kmx git

Commit	Date	Message
131f0805	2021-06-16T17:45:01	Fix documentation formatting for git_diff_file
ed94f549	2021-05-01T20:26:49	diff:add option to ignore blank line changes
96585597	2021-04-12T23:52:03	Fix diff_entrycount -> diff_num_deltas doc typo This just fixes a typo in the documentation, actual rename change was done in 5f69a31f
fb439c97	2019-11-28T14:41:58	Merge pull request #5306 from herrerog/patchid diff: complete support for git patchid
4334b177	2019-06-23T15:43:38	blob: use `git_object_size_t` for object size Instead of using a signed type (`off_t`) use a new `git_object_size_t` for the sizes of objects.
b921964b	2019-11-07T13:08:51	diff_print: add support for GIT_DIFF_FORMAT_PATCH_ID. Git is generating patch-id using a stripped down version of a patch where hunk header and index information are not present. Signed-off-by: Gregory Herrero <gregory.herrero@oracle.com>
452b7f8f	2019-09-25T20:29:21	Don't use enum for flags Using an `enum` causes trouble when used with C++ as bitwise operations are not possible w/o casting (e.g., `opts.flags &= ~GIT_BLOB_FILTER_CHECK_FOR_BINARY;` is invalid as there is no `&=` operator for `enum`). Signed-off-by: Sven Strickroth <email@cs-ware.de>
0b5ba0d7	2019-06-06T16:36:23	Rename opt init functions to `options_init` In libgit2 nomenclature, when we need to verb a direct object, we name a function `git_directobject_verb`. Thus, if we need to init an options structure named `git_foo_options`, then the name of the function that does that should be `git_foo_options_init`. The previous names of `git_foo_init_options` is close - it _sounds_ as if it's initializing the options of a `foo`, but in fact `git_foo_options` is its own noun that should be respected. Deprecate the old names; they'll now call directly to the new ones.
22d2062d	2019-01-09T18:25:10	Introduce GIT_CALLBACK macro to enforce cdecl Since we now always build the library with cdecl calling conventions, our callbacks should be decorated as such so that users will not be able to provide callbacks defined with other calling conventions. The `GIT_CALLBACK` macro will inject the `__cdecl` attribute as appropriate.
a4a028be	2018-08-29T22:49:35	diff: documentation mashup
2d9d2464	2018-06-12T10:34:10	diff: fix enum value being out of allowed range The C89 standard states in §6.7.2.2 "Enumeration specifiers": > The expression that defines the value of an enumeration constant shall > be an integer constant expression that has a value representable as an > int. On most platforms, this effectively limits the range to a 32 bit signed integer. The enum `git_diff_option_t` though recently gained an entry `GIT_DIFF_INDENT_HEURISTIC = (1u << 31)`, which breaks this limit. Fix the issue by using a gap in `git_diff_option_t`'s enum values. While this has the benefit of retaining our API, it may break applications which do not get recompiled after upgrading libgit2. But as we are bumping the soversion on each release anyway and thus force a recompile of dependents, this is not a problem.
04c48afc	2018-04-20T21:07:17	docs: standardize struct git_*_options comments
ca5a15e5	2018-03-22T23:27:27	docs: standardize comment block for git_*_init_options functions
5f6383ca	2018-03-08T08:17:29	diff: ensure an unsigned number is shifted
7e3faf58	2017-10-29T15:05:28	diff: expose the "indent heuristic" in the diff options We default to off, but we might want to consider changing `GIT_DIFF_NORMAL` to include it.
2a3cfc23	2017-08-11T17:15:51	Docs: Fix inline comments for git_diff_hunk
89a34828	2017-06-16T13:34:43	diff: implement function to calculate patch ID The upstream git project provides the ability to calculate a so-called patch ID. Quoting from git-patch-id(1): A "patch ID" is nothing but a sum of SHA-1 of the file diffs associated with a patch, with whitespace and line numbers ignored." Patch IDs can be used to identify two patches which are probably the same thing, e.g. when a patch has been cherry-picked to another branch. This commit implements a new function `git_diff_patchid`, which gets a patch and derives an OID from the diff. Note the different terminology here: a patch in libgit2 are the differences in a single file and a diff can contain multiple patches for different files. The implementation matches the upstream implementation and should derive the same OID for the same diff. In fact, some code has been directly derived from the upstream implementation. The upstream implementation has two different modes to calculate patch IDs, which is the stable and unstable mode. The old way of calculating the patch IDs was unstable in a sense that a different ordering the diffs was leading to different results. This oversight was fixed in git 1.9, but as git tries hard to never break existing workflows, the old and unstable way is still default. The newer and stable way does not care for ordering of the diff hunks, and in fact it is the mode that should probably be used today. So right now, we only implement the stable way of generating the patch ID.
adedac5a	2016-09-02T02:03:45	diff: treat binary patches with no data special When creating and printing diffs, deal with binary deltas that have binary data specially, versus diffs that have a binary file but lack the actual binary data.
e2e7f31a	2016-08-05T20:00:22	diff: document `git_diff_from_buffer`
002c8e29	2016-08-03T17:09:41	git_diff_file: move `id_abbrev` Move `id_abbrev` to a more reasonable place where it packs more nicely (before anybody starts using it).
72827490	2016-04-25T12:40:19	Introduce `git_diff_to_buf` Like `git_patch_to_buf`, provide a simple helper method that can print an entire diff directory to a `git_buf`.
7166bb16	2016-04-25T00:35:48	introduce `git_diff_from_buffer` to parse diffs Parse diff files into a `git_diff` structure.
d68cb736	2015-09-22T18:25:03	diff: include oid length in deltas Now that `git_diff_delta` data can be produced by reading patch file data, which may have an abbreviated oid, allow consumers to know that the id is abbreviated.
d34f6826	2014-04-08T17:18:47	Patch parsing from patch files
804bcd6b	2016-02-05T01:59:07	Fix typo
254e0a33	2015-11-24T13:43:43	diff: include commit message when formatting patch When formatting a patch as email we do not include the commit's message in the formatted patch output. Implement this and add a test that verifies behavior.
3138ad93	2015-07-16T10:17:16	Add diff progress callback.
53c2296b	2015-08-31T19:41:43	iterator: better document GIT_DIFF_DISABLE_PATHSPEC_MATCH
56ed415a	2015-08-30T19:10:00	diff: drop `FILELIST_MATCH` Now that non-pathspec matching diffs are implemented at the iterator level, drop `FILELIST_MATCH`ing.
3273ab3f	2015-08-28T20:06:18	diff: better document GIT_DIFF_PATHSPEC_DISABLE Document that `GIT_DIFF_PATHSPEC_DISABLE` is not necessarily about explicit path matching, but also includes matching of directory names. Enforce this in a test.
ef206124	2015-07-28T19:55:37	Move filelist into the iterator handling itself.
ccef5adb	2015-06-30T09:30:20	Added git_diff_index_to_index()
c2418f46	2015-06-25T12:48:44	Rename FALLBACK to UNSPECIFIED Fallback describes the mechanism, while unspecified explains what the user is thinking.
c6f489c9	2015-05-04T17:29:12	submodule: add an ignore option to status This lets us specify in the status call which ignore rules we want to use (optionally falling back to whatever the submodule has in its configuration). This removes one of the reasons for having `_set_ignore()` set the value in-memory. We re-use the `IGNORE_RESET` value for this as it is no longer relevant but has a similar purpose to `IGNORE_FALLBACK`. Similarly, we remove `IGNORE_DEFAULT` which does not have use outside of initializers and move that to fall back to the configuration as well.
8147b1af	2015-05-25T20:03:59	diff: introduce binary diff callbacks Introduce a new binary diff callback to provide the actual binary delta contents to callers. Create this data from the diff contents (instead of directly from the ODB) to support binary diffs including the workdir, not just things coming out of the ODB.
10549a2d	2015-05-19T18:26:04	Introduce `GIT_DIFF_FLAG_EXISTS` Mark the `old_file` and `new_file` sides of a delta with a new bit, `GIT_DIFF_FLAG_EXISTS`, that introduces that a particular side of the delta exists in the diff. This is useful for indicating whether a working directory item exists or not, in the presence of a conflict. Diff users may have previously used DELETED to determine this information.
7c948014	2015-05-14T14:00:29	diff/status: introduce conflicts When diffing against an index, return a new `GIT_DELTA_CONFLICTED` delta type for items that are conflicted. For a single file path, only one delta will be produced (despite the fact that there are multiple entries in the index). Index iterators now have the (optional) ability to return conflicts in the index. Prior to this change, they would be omitted, and callers (like diff) would omit conflicted index entries entirely.
4beab1f8	2015-03-31T16:29:35	checkout: break case-changes into delete/add When checking out with a case-insensitive working directory, we want to change the case of items in the working directory to reflect changes that occured in the checkout target. Diff now has an option to break case-changing renames into delete/add.
3538f8f1	2015-02-03T13:41:35	diff docs: update `git_diff_delta` description
d88766c4	2014-10-26T10:40:46	Changed context_lines and interhunk_lines to uint32_t to match struct s_xdemitconf
12e18031	2014-10-17T22:22:59	Update some documentation
06280457	2014-09-18T11:53:24	Join typedef and struct definitions in single file.
35b1471f	2014-07-22T11:15:33	Move the UNREADABLE enums to the correct group.
dc49e1b5	2014-06-04T15:36:28	Merge remote-tracking branch 'origin/development' into fix-git-status-list-new-unreadable-folder Conflicts: include/git2/diff.h
7b491a7d	2014-06-03T17:50:00	GIT_DIFF_INCLUDE_UNREADABLE_AS_UNTRACKED
11e2665e	2014-06-02T18:53:32	Formatting fixes for the docs These are some issues I found while playing around with the new parser for docurium.
61bef72d	2014-05-20T23:57:40	Start adding GIT_DELTA_UNREADABLE and GIT_STATUS_WT_UNREADABLE.
9c8ed499	2014-04-29T15:05:58	Remove trace / add git_diff_perfdata struct + api
702efc89	2014-04-30T10:57:42	Make init_options fns use unsigned ints and macro Use an unsigned int for the version and add a helper macro so the code is simplified (and so the error message is a common string).
7a2e56a3	2014-04-29T14:30:15	Get rid of redundant git_diff_options_init fn Since git_diff_init_options was introduced, remove this old fn.
94fb4aad	2014-04-28T14:48:41	Add diff option to update index stat cache When diff is scanning the working directory, if it finds a file where it is not sure if the index entry matches the working dir, it will recalculate the OID (which is pretty expensive). This adds a new flag to diff so that if the OID calculation finds that the file actually has not changed (i.e. just the modified time was altered or such), then it will refresh the stat cache in the index so that future calls to diff will not have to check the oid again.
212b6205	2014-04-23T09:27:15	Merge pull request #2291 from ethomson/patch_binary patch: emit deflated binary patches (optionally)
e349ed50	2014-04-22T14:58:33	patch: emit binary patches (optionally)
8d09efa2	2014-04-22T12:33:27	Use git_diff_get_stats in example/diff + refactor This takes the `--stat` and related example options in the example diff.c program and converts them to use the `git_diff_get_stats` API which nicely formats stats for you. I went to add bar-graph scaling to the stats formatter and noticed that the `git_diff_stats` structure was holding on to all of the `git_patch` objects. Unfortunately, each of these objects keeps the full text of the diff in memory, so this is very expensive. I ended up modifying `git_diff_stats` to keep just the data that it needs to keep and allowed it to release the patches. Then, I added width scaling to the output on top of that. In making the diff example program match 'git diff' output, I ended up removing an newline from the sumamry output which I then had to compensate for in the email formatting to match the expectations. Lastly, I went through and refactored the tests to use a couple of helper functions and reduce the overall amount of code there.
12e422a0	2014-04-21T16:08:05	Some doc and examples/diff.c changes I was playing with "git diff-index" and wanted to be able to emulate that behavior a little more closely with the diff example. Also, I wanted to play with running `git_diff_tree_to_workdir` directly even though core Git doesn't exactly have the equivalent, so I added a command line option for that and tweaked some other things in the example code. This changes a minor output thing in that the "raw" print helper function will no longer add ellipses (...) if the OID is not actually abbreviated.
d8cc1fb6	2014-04-11T19:15:15	Introduce git_diff_format_email and git_diff_commit_as_email
360314c9	2014-04-11T19:03:29	Introduce git_diff_get_stats, git_diff_stats_files_changed, git_diff_stats_insertions, git_diff_stats_deletions and git_diff_stats_to_buf
b9f81997	2014-03-05T21:49:23	Added function-based initializers for every options struct. The basic structure of each function is courtesy of arrbee.
6789b7a7	2014-02-27T14:13:22	Add buffer to buffer diff and patch APIs This adds `git_diff_buffers` and `git_patch_from_buffers`. This also includes a bunch of internal refactoring to increase the shared code between these functions and the blob-to-blob and blob-to-buffer APIs, as well as some higher level assert helpers in the tests to also remove redundancy.
86bfc3e1	2014-01-24T20:30:10	diff: change id abbrev option's name to id_abbrev Same as the other commits in the series, we use 'id' when talking about thing rather than the datatype.
9950bb4e	2014-01-24T20:23:17	diff: rename the file's 'oid' to 'id' In the same vein as the previous commits in this series.
373cf6a9	2013-12-09T10:17:47	Update docs for new callback return value behavior
9f77b3f6	2013-11-25T14:21:34	Add config read fns with controlled error behavior This adds `git_config__lookup_entry` which will look up a key in a config and return either the entry or NULL if the key was not present. Optionally, it can either suppress all errors or can return them (although not finding the key is not an error for this function). Unlike other accessors, this does not normalize the config key string, so it must only be used when the key is known to be in normalized form (i.e. all lower-case before the first dot and after the last dot, with no invalid characters). This also adds three high-level helper functions to look up config values with no errors and a fallback value. The three functions are for string, bool, and int values, and will resort to the fallback value for any error that arises. They are: * `git_config__get_string_force` * `git_config__get_bool_force` * `git_config__get_int_force` None of them normalize the config `key` either, so they can only be used for internal cases where the key is known to be in normal format.
a7c83aec	2013-12-06T13:39:08	Clarify docs
710f3838	2013-12-06T09:32:09	Clarify default value and behavior
a6ebc2bd	2013-12-04T15:17:39	Introduce GIT_DIFF_FIND_BY_CONFIG
f62c174d	2013-12-02T13:49:58	GIT_DIFF_FIND_REMOVE_UNMODIFIED sounds better
97ad85b8	2013-12-02T13:30:05	Add GIT_DIFF_FIND_DELETE_UNMODIFIED flag When doing copy detection, it is often necessary to include UNMODIFIED records in the git_diff so they are available as source records for GIT_DIFF_FIND_COPIES_FROM_UNMODIFIED. Yet in the final diff, often you will not want to have these UNMODIFIED records. This adds a flag which marks these UNMODIFIED records for deletion from the diff list so they will be removed after the rename detect phase is over.
d8e7ffc2	2013-11-18T14:03:25	Add content offset to git_diff_line For additions and deletions, external consumers like subversion can make use of the content offset to generate diffs in their proprietary formats.
4bf630b6	2013-10-31T14:36:52	Make diff and status perform soft index reload This changes `git_index_read` to have two modes - a hard index reload that always resets the index to match the on-disk data (which was the old behavior) and a soft index reload that uses the timestamp / file size information and only replaces the index data if the file on disk has been modified. This then updates the git_status code to do a soft reload unless the new GIT_STATUS_OPT_NO_REFRESH flag is passed in. This also changes the behavior of the git_diff functions that use the index so that when an index is not explicitly passed in (i.e. when the functions call git_repository_index for you), they will also do a soft reload for you. This intentionally breaks the file signature of git_index_read because there has been some confusion about the behavior previously and it seems like all existing uses of the API should probably be examined to select the desired behavior.
a5c16f3c	2013-11-01T10:18:03	Add git_diff_options_init helper Sometimes the static initializer for git_diff_options cannot be used and since setting them to all zeroes doesn't actually work quite right, this adds a new helper for that situation. This also adds an explicit new value to the submodule settings options to be used when those enums need static initialization.
7ce60099	2013-10-22T11:12:44	Fix typo
5de4ec81	2013-10-21T15:36:38	Implement patience and minimal diff flags It seems that to implement these options, we just have to pass the appropriate flags through to the libxdiff code taken from core git. So let's do it (and add a test).
3b5f7954	2013-10-21T13:42:42	Create git_diff_line and extend git_diff_hunk Instead of having functions with so very many parameters to pass hunk and line data, this takes the existing git_diff_hunk struct and extends it with more hunk data, plus adds a git_diff_line. Those structs are used to pass back hunk and line data instead of the old APIs that took tons of parameters. Some work that was previously only being done for git_diff_patch creation (scanning the diff content for exact line counts) is now done for all callbacks, but the performance difference should not be noticable.
74a627f0	2013-10-21T09:07:19	Tweak to git_diff_delta structure for nfiles While the base git_diff_delta structure always contains two files, when we introduce conflict data, it will be helpful to have an indicator when an additional file is involved.
10672e3e	2013-10-15T15:10:07	Diff API cleanup This lays groundwork for separating formatting options from diff creation options. This groups the formatting flags separately from the diff list creation flags and reorders the options. This also tweaks some APIs to further separate code that uses patches from code that just looks at git_diffs.
3ff1d123	2013-10-11T14:51:54	Rename diff objects and split patch.h This makes no functional change to diff but renames a couple of the objects and splits the new git_patch (formerly git_diff_patch) into a new header file.
17c7fbf6	2013-08-21T14:07:53	Split rewrites, status doesn't return rewrites Ensure that we apply splits to rewrites, even if we're not interested in examining it closely for rename/copy detection. In keeping with core git, status should not display rewrites, it should simply show files as "modified".
eb1c1707	2013-07-23T15:45:58	Restore GIT_DIFF_LINE_BINARY usage This restores the usage of GIT_DIFF_LINE_BINARY for the diff output line that reads "Binary files x and y differ" so that it can be optionally colorized independently of the file header.
197b8966	2013-07-23T14:34:31	Add hunk/file headers to git_diff_patch_size This allows git_diff_patch_size to account for hunk headers and file headers in the returned size. This required some refactoring of the code that is used to print file headers so that it could be invoked by the git_diff_patch_size API. Also this increases the test coverage and fixes an off-by-one bug in the size calculation when newline changes happen at the end of the file.
b4a4cf24	2013-07-22T16:07:56	Add git_diff_patch_size() API This adds a new API to get the size in bytes of the diffs in a git_diff_patch object.
f9775a37	2013-06-29T23:22:31	Add ignore_submodules to diff options This adds correct support for an equivalent to --ignore-submodules in diff, where an actual ignore value can be passed to diff to override the per submodule settings in the configuration. This required tweaking the constants for ignore values so that zero would not be used and could represent an unset option to the diff. This was an opportunity to move the submodule values into include/git2/types.h and to rename the poorly named DEFAULT values for ignore and update constants to RESET instead. Now the GIT_DIFF_IGNORE_SUBMODULES flag is exactly the same as setting the ignore_submodules option to GIT_SUBMODULE_IGNORE_ALL (which is actually a minor change from the old behavior in that submodules will now be treated as UNMODIFIED deltas instead of being left out totally - if you set GIT_DIFF_INCLUDE_UNMODIFIED). This includes tests for the various new settings.
2b672d5b	2013-07-08T22:46:36	Add git_pathspec_match_diff API This adds an additional pathspec API that will match a pathspec against a diff object. This is convenient if you want to handle renames (so you need the whole diff and can't use the pathspec constraint built into the diff API) but still want to tell if the diff had any files that matched the pathspec. When the pathspec is matched against a diff, instead of keeping a list of filenames that matched, instead the API keeps the list of git_diff_deltas that matched and they can be retrieved via a new API git_pathspec_match_list_diff_entry. There are a couple of other minor API extensions here that were mostly for the sake of convenience and to reduce dependencies on knowing the internal data structure between files inside the library.
e1967164	2013-06-24T15:33:41	Fixed most documentation header bugs Fixed a few header @param and @return typos with the help of -Wdocumentation in Xcode. The following warnings have not been fixed: common.h:213 - Not sure how the documentation format is for '...' notes.h:102 - Correct @param name but empty text notes.h:111 - Correct @param name but empty text pack.h:140 - @return missing text pack.h:148 - @return missing text
74ded024	2013-06-17T17:03:34	Add "as_path" parameters to blob and buffer diffs This adds parameters to the four functions that allow for blob-to- blob and blob-to-buffer differencing (either via callbacks or by making a git_diff_patch object). These parameters let you say that filename we should pretend the blob has while doing the diff. If you pass NULL, there should be no change from the existing behavior, which is to skip using attributes for file type checks and just look at content. With the parameters, you can plug into the new diff driver functionality and get binary or non-binary behavior, plus function context regular expressions, etc. This commit also fixes things so that the git_diff_delta that is generated by these functions will actually be populated with the data that we know about the blobs (or buffers) so you can use it appropriately. It also fixes a bug in generating patches from the git_diff_patch objects created via these functions. Lastly, there is one other behavior change that may matter. If there is no difference between the two blobs, these functions no longer generate any diff callbacks / patches unless you have passed in GIT_DIFF_INCLUDE_UNMODIFIED. This is pretty natural, but could potentially change the behavior of existing usage.
f9c824c5	2013-06-12T11:55:27	Add patch from blobs API This adds two new public APIs: git_diff_patch_from_blobs and git_diff_patch_from_blob_and_buffer, plus it refactors the code for git_diff_blobs and git_diff_blob_to_buffer so that they code is almost entirely shared between these APIs, and adds tests for the new APIs.
5dc98298	2013-06-11T11:22:22	Implement regex pattern diff driver This implements the loading of regular expression pattern lists for diff drivers that search for function context in that way. This also changes the way that diff drivers update options and interface with xdiff APIs to make them a little more flexible.
d20b0449	2013-05-24T10:37:40	Clarify GIT_DIFF_INCLUDE_UNTRACKED_CONTENT option This improves the docs for GIT_DIFF_INCLUDE_UNTRACKED_CONTENT as well as the other flags related to UNTRACKED items in diff, plus it makes that flag now automatically turn on GIT_DIFF_INCLUDE_UNTRACKED which seems like a reasonable dwim type of change.
67db583d	2013-05-23T15:06:07	More diff rename tests; better split swap handling This adds a couple more tests of different rename scenarios. Also, this fixes a problem with the case where you have two "split" deltas and the left half of one matches the right half of the other. That case was already being handled, but in the wrong order in a way that could result in bad output. Also, if the swap also happened to put the other two halves into the correct place (i.e. two files exchanged places with each other), then the second delta was left with the SPLIT flag set when it really should be cleared.
a21cbb12	2013-05-22T10:37:12	Significant rename detection rewrite This flips rename detection around so instead of creating a forward mapping from deltas to possible rename targets, instead it creates a reverse mapping, looking at possible targets and trying to find a source that they could have been renamed or copied from. This is important because each output can only have a single source, but a given source could map to multiple outputs (in the form of COPIED records). Additionally, this makes a couple of tweaks to the public rename detection APIs, mostly renaming a couple of options that control the behavior to make more sense and to be more like core Git. I walked through the tests looking at the exact results and updated the expectations based on what I saw. The new code is different from the old because it cannot give some nonsense results (like A was renamed to both B and C) which were part of the outputs previously.
9be5be47	2013-05-20T13:37:21	More git_diff_find_similar improvements - Add new GIT_DIFF_FIND_EXACT_MATCH_ONLY flag to do similarity matching without using the similarity metric (i.e. only compare the SHA). - Clean up the similarity measurement code to more rigorously distinguish between files that are not similar and files that are not comparable (previously, a 0 could either mean that the files could not be compared or that they were totally different) - When splitting a MODIFIED file into a DELETE/ADD pair, actually make a DELETED/UNTRACKED pair if the right side of the diff is from the working directory. This prevents an odd mix of ADDED and UNTRACKED files on workdir diffs.
d958e37a	2013-05-17T17:21:45	Fix issues with git_diff_find_similar There are a number of bugs in the rename code that only were obvious when I started testing it against large old repos with more complex patterns. (The code to do that testing is not ready to merge with libgit2, but I do plan to add more thorough tests.) This contains a significant number of changes and also tweaks the public API slightly to make emulating core git easier. Most notably, this separates the GIT_DIFF_FIND_AND_BREAK_REWRITES flag into FIND_REWRITES (which adds a self-similarity score to every modified file) and BREAK_REWRITES (which splits the modified deltas into add/remove pairs in the diff list). When you do a raw output of core git, rewrites show up as M090 or such, not at A and D output, so I wanted to be able to emulate that. Publicly, this also changes the flags to be uint16_t since we don't need values out of that range. Internally, this contains significant changes from a number of small bug fixes (like using the wrong side of the diff to decide if the object could be found in the ODB vs the workdir) to larger issues about which files can and should be compared and how the various edge cases of similarity scores should be treated. Honestly, I don't think this is the last update that will have to be made to this code, but I think this moves us closer to correct behavior and I tried to document the code so it would be easier to follow..
aadfa85b	2013-05-17T16:41:15	Add git_diff_print_raw printing helper Makes it easier to emulate the --raw option
d63eec69	2013-05-07T04:44:08	Improve diff function docs
e35e2684	2013-05-07T04:32:17	Add GIT_DIFF_LINE_CONTEXT_EOFNL This adds a new line origin constant for the special line that is used when both files end without a newline. In the course of writing the tests for this, I was having problems with modifying a file but not having diff notice because it was the same size and modified less than one second from the start of the test, so I decided to start working on nanosecond timestamp support. This commit doesn't contain the nanosecond support, but it contains the reorganization of maybe_modified and the hooks so that if the nanosecond data were being read by stat() (or rather being copied by git_index_entry__init_from_stat), then the nsec would be taken into account. This new stuff could probably use some more tests, although there is some amount of it here.
61c00541	2013-04-29T06:21:56	Update comment for clarity
e26b14c0	2013-04-26T15:35:47	Update diff handling of untracked directories When diff encounters an untracked directory, there was a shortcut that it took which is not compatible with core git. This makes the default behavior no longer take that shortcut and instead look inside the untracked directory to see if there are any untracked files within it. If there are not, then the directory is treated as an ignore directory instead of an untracked directory. This has implications for the git_status APIs.
0c289dd7	2013-03-25T16:40:16	Recursing into ignored dirs for diff and status This implements working versions of GIT_DIFF_RECURSE_IGNORED_DIRS and GIT_STATUS_OPT_RECURSE_IGNORED_DIRS along with some tests for the newly available behaviors. This is not turned on by default for status, but can be accessed via the options to the extended version of the command.
1aa5318a	2013-03-09T16:04:34	diff: allow asking for diffs with no context Previously, 0 meant default. This is problematic, as asking for 0 context lines is a valid thing to do. Change GIT_DIFF_OPTIONS_INIT to default to three and stop treating 0 as a magic value. In case no options are provided, make sure the options in the diff object default to 3.
d4b747c1	2013-02-21T16:44:44	Add diff rename tests with partial similarity This adds some new tests that actually exercise the similarity metric between files to detect renames, copies, and split modified files that are too heavily modified. There is still more testing to do - these tests are just partially covering the cases. There is also one bug fix in this where a change set with only MODIFY being broken into ADD/DELETE (due to low self-similarity) without any additional RENAMED entries would end up not processing the split requests (because the num_rewrites counter got reset).

131f0805

2021-06-16T17:45:01

Fix documentation formatting for git_diff_file

ed94f549

2021-05-01T20:26:49

diff:add option to ignore blank line changes

96585597

2021-04-12T23:52:03

Fix diff_entrycount -> diff_num_deltas doc typo This just fixes a typo in the documentation, actual rename change was done in 5f69a31f

fb439c97

2019-11-28T14:41:58

Merge pull request #5306 from herrerog/patchid diff: complete support for git patchid

4334b177

2019-06-23T15:43:38

blob: use `git_object_size_t` for object size Instead of using a signed type (`off_t`) use a new `git_object_size_t` for the sizes of objects.

b921964b

2019-11-07T13:08:51

diff_print: add support for GIT_DIFF_FORMAT_PATCH_ID. Git is generating patch-id using a stripped down version of a patch where hunk header and index information are not present. Signed-off-by: Gregory Herrero <gregory.herrero@oracle.com>

452b7f8f

2019-09-25T20:29:21

Don't use enum for flags Using an `enum` causes trouble when used with C++ as bitwise operations are not possible w/o casting (e.g., `opts.flags &= ~GIT_BLOB_FILTER_CHECK_FOR_BINARY;` is invalid as there is no `&=` operator for `enum`). Signed-off-by: Sven Strickroth <email@cs-ware.de>

0b5ba0d7

2019-06-06T16:36:23

Rename opt init functions to `options_init` In libgit2 nomenclature, when we need to verb a direct object, we name a function `git_directobject_verb`. Thus, if we need to init an options structure named `git_foo_options`, then the name of the function that does that should be `git_foo_options_init`. The previous names of `git_foo_init_options` is close - it _sounds_ as if it's initializing the options of a `foo`, but in fact `git_foo_options` is its own noun that should be respected. Deprecate the old names; they'll now call directly to the new ones.

22d2062d

2019-01-09T18:25:10

Introduce GIT_CALLBACK macro to enforce cdecl Since we now always build the library with cdecl calling conventions, our callbacks should be decorated as such so that users will not be able to provide callbacks defined with other calling conventions. The `GIT_CALLBACK` macro will inject the `__cdecl` attribute as appropriate.

a4a028be

2018-08-29T22:49:35

diff: documentation mashup

2d9d2464

2018-06-12T10:34:10

diff: fix enum value being out of allowed range The C89 standard states in §6.7.2.2 "Enumeration specifiers": > The expression that defines the value of an enumeration constant shall > be an integer constant expression that has a value representable as an > int. On most platforms, this effectively limits the range to a 32 bit signed integer. The enum `git_diff_option_t` though recently gained an entry `GIT_DIFF_INDENT_HEURISTIC = (1u << 31)`, which breaks this limit. Fix the issue by using a gap in `git_diff_option_t`'s enum values. While this has the benefit of retaining our API, it may break applications which do not get recompiled after upgrading libgit2. But as we are bumping the soversion on each release anyway and thus force a recompile of dependents, this is not a problem.

04c48afc

2018-04-20T21:07:17

docs: standardize struct git_*_options comments

ca5a15e5

2018-03-22T23:27:27

docs: standardize comment block for git_*_init_options functions

5f6383ca

2018-03-08T08:17:29

diff: ensure an unsigned number is shifted

7e3faf58

2017-10-29T15:05:28

diff: expose the "indent heuristic" in the diff options We default to off, but we might want to consider changing `GIT_DIFF_NORMAL` to include it.

2a3cfc23

2017-08-11T17:15:51

Docs: Fix inline comments for git_diff_hunk

89a34828

2017-06-16T13:34:43

diff: implement function to calculate patch ID The upstream git project provides the ability to calculate a so-called patch ID. Quoting from git-patch-id(1): A "patch ID" is nothing but a sum of SHA-1 of the file diffs associated with a patch, with whitespace and line numbers ignored." Patch IDs can be used to identify two patches which are probably the same thing, e.g. when a patch has been cherry-picked to another branch. This commit implements a new function `git_diff_patchid`, which gets a patch and derives an OID from the diff. Note the different terminology here: a patch in libgit2 are the differences in a single file and a diff can contain multiple patches for different files. The implementation matches the upstream implementation and should derive the same OID for the same diff. In fact, some code has been directly derived from the upstream implementation. The upstream implementation has two different modes to calculate patch IDs, which is the stable and unstable mode. The old way of calculating the patch IDs was unstable in a sense that a different ordering the diffs was leading to different results. This oversight was fixed in git 1.9, but as git tries hard to never break existing workflows, the old and unstable way is still default. The newer and stable way does not care for ordering of the diff hunks, and in fact it is the mode that should probably be used today. So right now, we only implement the stable way of generating the patch ID.

adedac5a

2016-09-02T02:03:45

diff: treat binary patches with no data special When creating and printing diffs, deal with binary deltas that have binary data specially, versus diffs that have a binary file but lack the actual binary data.

e2e7f31a

2016-08-05T20:00:22

diff: document `git_diff_from_buffer`

002c8e29

2016-08-03T17:09:41

git_diff_file: move `id_abbrev` Move `id_abbrev` to a more reasonable place where it packs more nicely (before anybody starts using it).

72827490

2016-04-25T12:40:19

Introduce `git_diff_to_buf` Like `git_patch_to_buf`, provide a simple helper method that can print an entire diff directory to a `git_buf`.

7166bb16

2016-04-25T00:35:48

introduce `git_diff_from_buffer` to parse diffs Parse diff files into a `git_diff` structure.

d68cb736

2015-09-22T18:25:03

diff: include oid length in deltas Now that `git_diff_delta` data can be produced by reading patch file data, which may have an abbreviated oid, allow consumers to know that the id is abbreviated.

d34f6826

2014-04-08T17:18:47

Patch parsing from patch files

804bcd6b

2016-02-05T01:59:07

Fix typo

254e0a33

2015-11-24T13:43:43

diff: include commit message when formatting patch When formatting a patch as email we do not include the commit's message in the formatted patch output. Implement this and add a test that verifies behavior.

3138ad93

2015-07-16T10:17:16

Add diff progress callback.

53c2296b

2015-08-31T19:41:43

iterator: better document GIT_DIFF_DISABLE_PATHSPEC_MATCH

56ed415a

2015-08-30T19:10:00

diff: drop `FILELIST_MATCH` Now that non-pathspec matching diffs are implemented at the iterator level, drop `FILELIST_MATCH`ing.

3273ab3f

2015-08-28T20:06:18

diff: better document GIT_DIFF_PATHSPEC_DISABLE Document that `GIT_DIFF_PATHSPEC_DISABLE` is not necessarily about explicit path matching, but also includes matching of directory names. Enforce this in a test.

ef206124

2015-07-28T19:55:37

Move filelist into the iterator handling itself.

ccef5adb

2015-06-30T09:30:20

Added git_diff_index_to_index()

c2418f46

2015-06-25T12:48:44

Rename FALLBACK to UNSPECIFIED Fallback describes the mechanism, while unspecified explains what the user is thinking.

c6f489c9

2015-05-04T17:29:12

submodule: add an ignore option to status This lets us specify in the status call which ignore rules we want to use (optionally falling back to whatever the submodule has in its configuration). This removes one of the reasons for having `_set_ignore()` set the value in-memory. We re-use the `IGNORE_RESET` value for this as it is no longer relevant but has a similar purpose to `IGNORE_FALLBACK`. Similarly, we remove `IGNORE_DEFAULT` which does not have use outside of initializers and move that to fall back to the configuration as well.

8147b1af

2015-05-25T20:03:59

diff: introduce binary diff callbacks Introduce a new binary diff callback to provide the actual binary delta contents to callers. Create this data from the diff contents (instead of directly from the ODB) to support binary diffs including the workdir, not just things coming out of the ODB.

10549a2d

2015-05-19T18:26:04

Introduce `GIT_DIFF_FLAG_EXISTS` Mark the `old_file` and `new_file` sides of a delta with a new bit, `GIT_DIFF_FLAG_EXISTS`, that introduces that a particular side of the delta exists in the diff. This is useful for indicating whether a working directory item exists or not, in the presence of a conflict. Diff users may have previously used DELETED to determine this information.

7c948014

2015-05-14T14:00:29

diff/status: introduce conflicts When diffing against an index, return a new `GIT_DELTA_CONFLICTED` delta type for items that are conflicted. For a single file path, only one delta will be produced (despite the fact that there are multiple entries in the index). Index iterators now have the (optional) ability to return conflicts in the index. Prior to this change, they would be omitted, and callers (like diff) would omit conflicted index entries entirely.

4beab1f8

2015-03-31T16:29:35

checkout: break case-changes into delete/add When checking out with a case-insensitive working directory, we want to change the case of items in the working directory to reflect changes that occured in the checkout target. Diff now has an option to break case-changing renames into delete/add.

3538f8f1

2015-02-03T13:41:35

diff docs: update `git_diff_delta` description

d88766c4

2014-10-26T10:40:46

Changed context_lines and interhunk_lines to uint32_t to match struct s_xdemitconf

12e18031

2014-10-17T22:22:59

Update some documentation

06280457

2014-09-18T11:53:24

Join typedef and struct definitions in single file.

35b1471f

2014-07-22T11:15:33

Move the UNREADABLE enums to the correct group.

dc49e1b5

2014-06-04T15:36:28

Merge remote-tracking branch 'origin/development' into fix-git-status-list-new-unreadable-folder Conflicts: include/git2/diff.h

7b491a7d

2014-06-03T17:50:00

GIT_DIFF_INCLUDE_UNREADABLE_AS_UNTRACKED

11e2665e

2014-06-02T18:53:32

Formatting fixes for the docs These are some issues I found while playing around with the new parser for docurium.

61bef72d

2014-05-20T23:57:40

Start adding GIT_DELTA_UNREADABLE and GIT_STATUS_WT_UNREADABLE.

9c8ed499

2014-04-29T15:05:58

Remove trace / add git_diff_perfdata struct + api

702efc89

2014-04-30T10:57:42

Make init_options fns use unsigned ints and macro Use an unsigned int for the version and add a helper macro so the code is simplified (and so the error message is a common string).

7a2e56a3

2014-04-29T14:30:15

Get rid of redundant git_diff_options_init fn Since git_diff_init_options was introduced, remove this old fn.

94fb4aad

2014-04-28T14:48:41

Add diff option to update index stat cache When diff is scanning the working directory, if it finds a file where it is not sure if the index entry matches the working dir, it will recalculate the OID (which is pretty expensive). This adds a new flag to diff so that if the OID calculation finds that the file actually has not changed (i.e. just the modified time was altered or such), then it will refresh the stat cache in the index so that future calls to diff will not have to check the oid again.

212b6205

2014-04-23T09:27:15

Merge pull request #2291 from ethomson/patch_binary patch: emit deflated binary patches (optionally)

e349ed50

2014-04-22T14:58:33

patch: emit binary patches (optionally)

8d09efa2

2014-04-22T12:33:27

Use git_diff_get_stats in example/diff + refactor This takes the `--stat` and related example options in the example diff.c program and converts them to use the `git_diff_get_stats` API which nicely formats stats for you. I went to add bar-graph scaling to the stats formatter and noticed that the `git_diff_stats` structure was holding on to all of the `git_patch` objects. Unfortunately, each of these objects keeps the full text of the diff in memory, so this is very expensive. I ended up modifying `git_diff_stats` to keep just the data that it needs to keep and allowed it to release the patches. Then, I added width scaling to the output on top of that. In making the diff example program match 'git diff' output, I ended up removing an newline from the sumamry output which I then had to compensate for in the email formatting to match the expectations. Lastly, I went through and refactored the tests to use a couple of helper functions and reduce the overall amount of code there.

12e422a0

2014-04-21T16:08:05

Some doc and examples/diff.c changes I was playing with "git diff-index" and wanted to be able to emulate that behavior a little more closely with the diff example. Also, I wanted to play with running `git_diff_tree_to_workdir` directly even though core Git doesn't exactly have the equivalent, so I added a command line option for that and tweaked some other things in the example code. This changes a minor output thing in that the "raw" print helper function will no longer add ellipses (...) if the OID is not actually abbreviated.

d8cc1fb6

2014-04-11T19:15:15

Introduce git_diff_format_email and git_diff_commit_as_email

360314c9

2014-04-11T19:03:29

Introduce git_diff_get_stats, git_diff_stats_files_changed, git_diff_stats_insertions, git_diff_stats_deletions and git_diff_stats_to_buf

b9f81997

2014-03-05T21:49:23

Added function-based initializers for every options struct. The basic structure of each function is courtesy of arrbee.

6789b7a7

2014-02-27T14:13:22

Add buffer to buffer diff and patch APIs This adds `git_diff_buffers` and `git_patch_from_buffers`. This also includes a bunch of internal refactoring to increase the shared code between these functions and the blob-to-blob and blob-to-buffer APIs, as well as some higher level assert helpers in the tests to also remove redundancy.

86bfc3e1

2014-01-24T20:30:10

diff: change id abbrev option's name to id_abbrev Same as the other commits in the series, we use 'id' when talking about thing rather than the datatype.

9950bb4e

2014-01-24T20:23:17

diff: rename the file's 'oid' to 'id' In the same vein as the previous commits in this series.

373cf6a9

2013-12-09T10:17:47

Update docs for new callback return value behavior

9f77b3f6

2013-11-25T14:21:34

Add config read fns with controlled error behavior This adds `git_config__lookup_entry` which will look up a key in a config and return either the entry or NULL if the key was not present. Optionally, it can either suppress all errors or can return them (although not finding the key is not an error for this function). Unlike other accessors, this does not normalize the config key string, so it must only be used when the key is known to be in normalized form (i.e. all lower-case before the first dot and after the last dot, with no invalid characters). This also adds three high-level helper functions to look up config values with no errors and a fallback value. The three functions are for string, bool, and int values, and will resort to the fallback value for any error that arises. They are: * `git_config__get_string_force` * `git_config__get_bool_force` * `git_config__get_int_force` None of them normalize the config `key` either, so they can only be used for internal cases where the key is known to be in normal format.

a7c83aec

2013-12-06T13:39:08

Clarify docs

710f3838

2013-12-06T09:32:09

Clarify default value and behavior

a6ebc2bd

2013-12-04T15:17:39

Introduce GIT_DIFF_FIND_BY_CONFIG

f62c174d

2013-12-02T13:49:58

GIT_DIFF_FIND_REMOVE_UNMODIFIED sounds better

97ad85b8

2013-12-02T13:30:05

Add GIT_DIFF_FIND_DELETE_UNMODIFIED flag When doing copy detection, it is often necessary to include UNMODIFIED records in the git_diff so they are available as source records for GIT_DIFF_FIND_COPIES_FROM_UNMODIFIED. Yet in the final diff, often you will not want to have these UNMODIFIED records. This adds a flag which marks these UNMODIFIED records for deletion from the diff list so they will be removed after the rename detect phase is over.

d8e7ffc2

2013-11-18T14:03:25

Add content offset to git_diff_line For additions and deletions, external consumers like subversion can make use of the content offset to generate diffs in their proprietary formats.

4bf630b6

2013-10-31T14:36:52

Make diff and status perform soft index reload This changes `git_index_read` to have two modes - a hard index reload that always resets the index to match the on-disk data (which was the old behavior) and a soft index reload that uses the timestamp / file size information and only replaces the index data if the file on disk has been modified. This then updates the git_status code to do a soft reload unless the new GIT_STATUS_OPT_NO_REFRESH flag is passed in. This also changes the behavior of the git_diff functions that use the index so that when an index is not explicitly passed in (i.e. when the functions call git_repository_index for you), they will also do a soft reload for you. This intentionally breaks the file signature of git_index_read because there has been some confusion about the behavior previously and it seems like all existing uses of the API should probably be examined to select the desired behavior.

a5c16f3c

2013-11-01T10:18:03

Add git_diff_options_init helper Sometimes the static initializer for git_diff_options cannot be used and since setting them to all zeroes doesn't actually work quite right, this adds a new helper for that situation. This also adds an explicit new value to the submodule settings options to be used when those enums need static initialization.

7ce60099

2013-10-22T11:12:44

Fix typo

5de4ec81

2013-10-21T15:36:38

Implement patience and minimal diff flags It seems that to implement these options, we just have to pass the appropriate flags through to the libxdiff code taken from core git. So let's do it (and add a test).

3b5f7954

2013-10-21T13:42:42

Create git_diff_line and extend git_diff_hunk Instead of having functions with so very many parameters to pass hunk and line data, this takes the existing git_diff_hunk struct and extends it with more hunk data, plus adds a git_diff_line. Those structs are used to pass back hunk and line data instead of the old APIs that took tons of parameters. Some work that was previously only being done for git_diff_patch creation (scanning the diff content for exact line counts) is now done for all callbacks, but the performance difference should not be noticable.

74a627f0

2013-10-21T09:07:19

Tweak to git_diff_delta structure for nfiles While the base git_diff_delta structure always contains two files, when we introduce conflict data, it will be helpful to have an indicator when an additional file is involved.

10672e3e

2013-10-15T15:10:07

Diff API cleanup This lays groundwork for separating formatting options from diff creation options. This groups the formatting flags separately from the diff list creation flags and reorders the options. This also tweaks some APIs to further separate code that uses patches from code that just looks at git_diffs.

3ff1d123

2013-10-11T14:51:54

Rename diff objects and split patch.h This makes no functional change to diff but renames a couple of the objects and splits the new git_patch (formerly git_diff_patch) into a new header file.

17c7fbf6

2013-08-21T14:07:53

Split rewrites, status doesn't return rewrites Ensure that we apply splits to rewrites, even if we're not interested in examining it closely for rename/copy detection. In keeping with core git, status should not display rewrites, it should simply show files as "modified".

eb1c1707

2013-07-23T15:45:58

Restore GIT_DIFF_LINE_BINARY usage This restores the usage of GIT_DIFF_LINE_BINARY for the diff output line that reads "Binary files x and y differ" so that it can be optionally colorized independently of the file header.

197b8966

2013-07-23T14:34:31

Add hunk/file headers to git_diff_patch_size This allows git_diff_patch_size to account for hunk headers and file headers in the returned size. This required some refactoring of the code that is used to print file headers so that it could be invoked by the git_diff_patch_size API. Also this increases the test coverage and fixes an off-by-one bug in the size calculation when newline changes happen at the end of the file.

b4a4cf24

2013-07-22T16:07:56

Add git_diff_patch_size() API This adds a new API to get the size in bytes of the diffs in a git_diff_patch object.

f9775a37

2013-06-29T23:22:31

Add ignore_submodules to diff options This adds correct support for an equivalent to --ignore-submodules in diff, where an actual ignore value can be passed to diff to override the per submodule settings in the configuration. This required tweaking the constants for ignore values so that zero would not be used and could represent an unset option to the diff. This was an opportunity to move the submodule values into include/git2/types.h and to rename the poorly named DEFAULT values for ignore and update constants to RESET instead. Now the GIT_DIFF_IGNORE_SUBMODULES flag is exactly the same as setting the ignore_submodules option to GIT_SUBMODULE_IGNORE_ALL (which is actually a minor change from the old behavior in that submodules will now be treated as UNMODIFIED deltas instead of being left out totally - if you set GIT_DIFF_INCLUDE_UNMODIFIED). This includes tests for the various new settings.

2b672d5b

2013-07-08T22:46:36

Add git_pathspec_match_diff API This adds an additional pathspec API that will match a pathspec against a diff object. This is convenient if you want to handle renames (so you need the whole diff and can't use the pathspec constraint built into the diff API) but still want to tell if the diff had any files that matched the pathspec. When the pathspec is matched against a diff, instead of keeping a list of filenames that matched, instead the API keeps the list of git_diff_deltas that matched and they can be retrieved via a new API git_pathspec_match_list_diff_entry. There are a couple of other minor API extensions here that were mostly for the sake of convenience and to reduce dependencies on knowing the internal data structure between files inside the library.

e1967164

2013-06-24T15:33:41

Fixed most documentation header bugs Fixed a few header @param and @return typos with the help of -Wdocumentation in Xcode. The following warnings have not been fixed: common.h:213 - Not sure how the documentation format is for '...' notes.h:102 - Correct @param name but empty text notes.h:111 - Correct @param name but empty text pack.h:140 - @return missing text pack.h:148 - @return missing text

74ded024

2013-06-17T17:03:34

Add "as_path" parameters to blob and buffer diffs This adds parameters to the four functions that allow for blob-to- blob and blob-to-buffer differencing (either via callbacks or by making a git_diff_patch object). These parameters let you say that filename we should pretend the blob has while doing the diff. If you pass NULL, there should be no change from the existing behavior, which is to skip using attributes for file type checks and just look at content. With the parameters, you can plug into the new diff driver functionality and get binary or non-binary behavior, plus function context regular expressions, etc. This commit also fixes things so that the git_diff_delta that is generated by these functions will actually be populated with the data that we know about the blobs (or buffers) so you can use it appropriately. It also fixes a bug in generating patches from the git_diff_patch objects created via these functions. Lastly, there is one other behavior change that may matter. If there is no difference between the two blobs, these functions no longer generate any diff callbacks / patches unless you have passed in GIT_DIFF_INCLUDE_UNMODIFIED. This is pretty natural, but could potentially change the behavior of existing usage.

f9c824c5

2013-06-12T11:55:27

Add patch from blobs API This adds two new public APIs: git_diff_patch_from_blobs and git_diff_patch_from_blob_and_buffer, plus it refactors the code for git_diff_blobs and git_diff_blob_to_buffer so that they code is almost entirely shared between these APIs, and adds tests for the new APIs.

5dc98298

2013-06-11T11:22:22

Implement regex pattern diff driver This implements the loading of regular expression pattern lists for diff drivers that search for function context in that way. This also changes the way that diff drivers update options and interface with xdiff APIs to make them a little more flexible.

d20b0449

2013-05-24T10:37:40

Clarify GIT_DIFF_INCLUDE_UNTRACKED_CONTENT option This improves the docs for GIT_DIFF_INCLUDE_UNTRACKED_CONTENT as well as the other flags related to UNTRACKED items in diff, plus it makes that flag now automatically turn on GIT_DIFF_INCLUDE_UNTRACKED which seems like a reasonable dwim type of change.

67db583d

2013-05-23T15:06:07

More diff rename tests; better split swap handling This adds a couple more tests of different rename scenarios. Also, this fixes a problem with the case where you have two "split" deltas and the left half of one matches the right half of the other. That case was already being handled, but in the wrong order in a way that could result in bad output. Also, if the swap also happened to put the other two halves into the correct place (i.e. two files exchanged places with each other), then the second delta was left with the SPLIT flag set when it really should be cleared.

a21cbb12

2013-05-22T10:37:12

Significant rename detection rewrite This flips rename detection around so instead of creating a forward mapping from deltas to possible rename targets, instead it creates a reverse mapping, looking at possible targets and trying to find a source that they could have been renamed or copied from. This is important because each output can only have a single source, but a given source could map to multiple outputs (in the form of COPIED records). Additionally, this makes a couple of tweaks to the public rename detection APIs, mostly renaming a couple of options that control the behavior to make more sense and to be more like core Git. I walked through the tests looking at the exact results and updated the expectations based on what I saw. The new code is different from the old because it cannot give some nonsense results (like A was renamed to both B and C) which were part of the outputs previously.

9be5be47

2013-05-20T13:37:21

More git_diff_find_similar improvements - Add new GIT_DIFF_FIND_EXACT_MATCH_ONLY flag to do similarity matching without using the similarity metric (i.e. only compare the SHA). - Clean up the similarity measurement code to more rigorously distinguish between files that are not similar and files that are not comparable (previously, a 0 could either mean that the files could not be compared or that they were totally different) - When splitting a MODIFIED file into a DELETE/ADD pair, actually make a DELETED/UNTRACKED pair if the right side of the diff is from the working directory. This prevents an odd mix of ADDED and UNTRACKED files on workdir diffs.

d958e37a

2013-05-17T17:21:45

Fix issues with git_diff_find_similar There are a number of bugs in the rename code that only were obvious when I started testing it against large old repos with more complex patterns. (The code to do that testing is not ready to merge with libgit2, but I do plan to add more thorough tests.) This contains a significant number of changes and also tweaks the public API slightly to make emulating core git easier. Most notably, this separates the GIT_DIFF_FIND_AND_BREAK_REWRITES flag into FIND_REWRITES (which adds a self-similarity score to every modified file) and BREAK_REWRITES (which splits the modified deltas into add/remove pairs in the diff list). When you do a raw output of core git, rewrites show up as M090 or such, not at A and D output, so I wanted to be able to emulate that. Publicly, this also changes the flags to be uint16_t since we don't need values out of that range. Internally, this contains significant changes from a number of small bug fixes (like using the wrong side of the diff to decide if the object could be found in the ODB vs the workdir) to larger issues about which files can and should be compared and how the various edge cases of similarity scores should be treated. Honestly, I don't think this is the last update that will have to be made to this code, but I think this moves us closer to correct behavior and I tried to document the code so it would be easier to follow..

aadfa85b

2013-05-17T16:41:15

Add git_diff_print_raw printing helper Makes it easier to emulate the --raw option

d63eec69

2013-05-07T04:44:08

Improve diff function docs

e35e2684

2013-05-07T04:32:17

Add GIT_DIFF_LINE_CONTEXT_EOFNL This adds a new line origin constant for the special line that is used when both files end without a newline. In the course of writing the tests for this, I was having problems with modifying a file but not having diff notice because it was the same size and modified less than one second from the start of the test, so I decided to start working on nanosecond timestamp support. This commit doesn't contain the nanosecond support, but it contains the reorganization of maybe_modified and the hooks so that if the nanosecond data were being read by stat() (or rather being copied by git_index_entry__init_from_stat), then the nsec would be taken into account. This new stuff could probably use some more tests, although there is some amount of it here.

61c00541

2013-04-29T06:21:56

Update comment for clarity

e26b14c0

2013-04-26T15:35:47

Update diff handling of untracked directories When diff encounters an untracked directory, there was a shortcut that it took which is not compatible with core git. This makes the default behavior no longer take that shortcut and instead look inside the untracked directory to see if there are any untracked files within it. If there are not, then the directory is treated as an ignore directory instead of an untracked directory. This has implications for the git_status APIs.

0c289dd7

2013-03-25T16:40:16

Recursing into ignored dirs for diff and status This implements working versions of GIT_DIFF_RECURSE_IGNORED_DIRS and GIT_STATUS_OPT_RECURSE_IGNORED_DIRS along with some tests for the newly available behaviors. This is not turned on by default for status, but can be accessed via the options to the extended version of the command.

1aa5318a

2013-03-09T16:04:34

diff: allow asking for diffs with no context Previously, 0 meant default. This is problematic, as asking for 0 context lines is a valid thing to do. Change GIT_DIFF_OPTIONS_INIT to default to three and stop treating 0 as a magic value. In case no options are provided, make sure the options in the diff object default to 3.

d4b747c1

2013-02-21T16:44:44

Add diff rename tests with partial similarity This adds some new tests that actually exercise the similarity metric between files to detect renames, copies, and split modified files that are too heavily modified. There is still more testing to do - these tests are just partially covering the cases. There is also one bug fix in this where a change set with only MODIFY being broken into ADD/DELETE (due to low self-similarity) without any additional RENAMED entries would end up not processing the split requests (because the num_rewrites counter got reset).

thodg/libgit2/include/git2/diff.h

include/git2/diff.h

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