kmx git

Commit	Date	Message
f0e693b1	2021-09-07T17:53:49	str: introduce `git_str` for internal, `git_buf` is external libgit2 has two distinct requirements that were previously solved by `git_buf`. We require: 1. A general purpose string class that provides a number of utility APIs for manipulating data (eg, concatenating, truncating, etc). 2. A structure that we can use to return strings to callers that they can take ownership of. By using a single class (`git_buf`) for both of these purposes, we have confused the API to the point that refactorings are difficult and reasoning about correctness is also difficult. Move the utility class `git_buf` to be called `git_str`: this represents its general purpose, as an internal string buffer class. The name also is an homage to Junio Hamano ("gitstr"). The public API remains `git_buf`, and has a much smaller footprint. It is generally only used as an "out" param with strict requirements that follow the documentation. (Exceptions exist for some legacy APIs to avoid breaking callers unnecessarily.) Utility functions exist to convert a user-specified `git_buf` to a `git_str` so that we can call internal functions, then converting it back again.
2d24690c	2021-04-15T07:48:43	Add testcase
d525e063	2021-05-10T23:04:59	buf: remove internal `git_buf_text` namespace The `git_buf_text` namespace is unnecessary and strange. Remove it, just keep the functions prefixed with `git_buf`.
f673e232	2018-12-27T13:47:34	git_error: use new names in internal APIs and usage Move to the `git_error` name in the internal API for error-related functions.
168fe39b	2018-11-28T14:26:57	object_type: use new enumeration names Use the new object_type enumeration names within the codebase.
ecf4f33a	2018-02-08T11:14:48	Convert usage of `git_buf_free` to new `git_buf_dispose`
ce7080a0	2018-02-20T10:38:27	diff_tform: fix rename detection with rewrite/delete pair A rewritten file can either be classified as a modification of its contents or of a delete of the complete file followed by an addition of the new content. This distinction becomes important when we want to detect renames for rewrites. Given a scenario where a file "a" has been deleted and another file "b" has been renamed to "a", this should be detected as a deletion of "a" followed by a rename of "a" -> "b". Thus, splitting of the original rewrite into a delete/add pair is important here. This splitting is represented by a flag we can set at the current delta. While the flag is already being set in case we want to break rewrites, we do not do so in case where the `GIT_DIFF_FIND_RENAMES_FROM_REWRITES` flag is set. This can trigger an assert when we try to match the source and target deltas. Fix the issue by setting the `GIT_DIFF_FLAG__TO_SPLIT` flag at the delta when it is a rename target and `GIT_DIFF_FIND_RENAMES_FROM_REWRITES` is set.
80e77b87	2018-02-20T10:03:48	tests: add rename-rewrite scenarios to "renames" repository Add two more scenarios to the "renames" repository. The first scenario has a major rewrite of a file and a delete of another file, the second scenario has a deletion of a file and rename of another file to the deleted file. Both scenarios will be used in the following commit.
d91da1da	2018-02-20T09:54:58	tests: diff::rename: use defines for commit OIDs While we frequently reuse commit OIDs throughout the file, we do not have any constants to refer to these commits. Make this a bit easier to read by giving the commit OIDs somewhat descriptive names of what kind of commit they refer to.
1a79cd95	2016-04-26T01:18:01	patch: show copy information for identical copies When showing copy information because we are duplicating contents, for example, when performing a `diff --find-copies-harder -M100 -B100`, then show copy from/to lines in a patch, and do not show context. Ensure that we can also parse such patches.
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.
f78d9b6c	2015-03-03T23:56:54	diff_tform: account for whitespace options When comparing seemingly blank files, take whitespace options into account.
a212716f	2015-03-03T18:19:42	diff_tform: don't compare empty hashsig_heaps Don't try to compare two empty hashsig_heaps.
659cf202	2015-01-07T12:23:05	Remove the signature from ref-modifying functions The signature for the reflog is not something which changes dynamically. Almost all uses will be NULL, since we want for the repository's default identity to be used, making it noise. In order to allow for changing the identity, we instead provide git_repository_set_ident() and git_repository_ident() which allow a user to override the choice of signature.
36fc5497	2014-12-02T05:11:12	Added GIT_HASHSIG_ALLOW_SMALL_FILES to allow computing signatures for small files The implementation of the hashsig API disallows computing a signature on small files containing only a few lines. This new flag disables this behavior. git_diff_find_similar() sets this flag by default which means that rename / copy detection of small files will now work. This in turn affects the behavior of the git_status and git_blame APIs which will now detect rename of small files assuming the right options are passed.
6affd71f	2014-01-03T17:38:34	git_checkout_opts -> git_checkout_options
c05cd792	2014-01-22T17:51:32	Drop git_patch_to_str It's hard or even impossible to correctly free the string buffer allocated by git_patch_to_str in some circumstances. Drop the function so people have to use git_patch_to_buf instead - git_buf has a dedicated destructor.
0b28217b	2014-01-15T12:51:31	refs: remove the _with_log differentiation Any well-behaved program should write a descriptive message to the reflog whenever it updates a reference. Let's make this more prominent by removing the version without the reflog parameters.
25e0b157	2013-12-06T15:07:57	Remove converting user error to GIT_EUSER This changes the behavior of callbacks so that the callback error code is not converted into GIT_EUSER and instead we propagate the return value through to the caller. Instead of using the giterr_capture and giterr_restore functions, we now rely on all functions to pass back the return value from a callback. To avoid having a return value with no error message, the user can call the public giterr_set_str or some such function to set an error message. There is a new helper 'giterr_set_callback' that functions can invoke after making a callback which ensures that some error message was set in case the callback did not set one. In places where the sign of the callback return value is meaningful (e.g. positive to skip, negative to abort), only the negative values are returned back to the caller, obviously, since the other values allow for continuing the loop. The hardest parts of this were in the checkout code where positive return values were overloaded as meaningful values for checkout. I fixed this by adding an output parameter to many of the internal checkout functions and removing the overload. This added some code, but it is probably a better implementation. There is some funkiness in the network code where user provided callbacks could be returning a positive or a negative value and we want to rely on that to cancel the loop. There are still a couple places where an user error might get turned into GIT_EUSER there, I think, though none exercised by the tests.
7fb4147f	2013-12-06T13:38:59	Don't clobber whitespace settings
628e92cd	2013-12-05T14:47:04	Don't use weird return codes
c56c6d69	2013-12-05T14:13:46	Implement 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.
2123a17f	2013-12-02T13:27:06	Fix bug making split deltas a COPIED targets When FIND_COPIES is used in combination with BREAK_REWRITES for rename detection, there was a bug where the split MODIFIED delta was only used as a target for RENAME records and not for COPIED records. This fixes that, converting the split into a pair of DELETED and COPIED deltas when that circumstance arises.
17820381	2013-11-14T14:05:52	Rename tests-clar to tests

f0e693b1

2021-09-07T17:53:49

str: introduce `git_str` for internal, `git_buf` is external libgit2 has two distinct requirements that were previously solved by `git_buf`. We require: 1. A general purpose string class that provides a number of utility APIs for manipulating data (eg, concatenating, truncating, etc). 2. A structure that we can use to return strings to callers that they can take ownership of. By using a single class (`git_buf`) for both of these purposes, we have confused the API to the point that refactorings are difficult and reasoning about correctness is also difficult. Move the utility class `git_buf` to be called `git_str`: this represents its general purpose, as an internal string buffer class. The name also is an homage to Junio Hamano ("gitstr"). The public API remains `git_buf`, and has a much smaller footprint. It is generally only used as an "out" param with strict requirements that follow the documentation. (Exceptions exist for some legacy APIs to avoid breaking callers unnecessarily.) Utility functions exist to convert a user-specified `git_buf` to a `git_str` so that we can call internal functions, then converting it back again.

2d24690c

2021-04-15T07:48:43

Add testcase

d525e063

2021-05-10T23:04:59

buf: remove internal `git_buf_text` namespace The `git_buf_text` namespace is unnecessary and strange. Remove it, just keep the functions prefixed with `git_buf`.

f673e232

2018-12-27T13:47:34

git_error: use new names in internal APIs and usage Move to the `git_error` name in the internal API for error-related functions.

168fe39b

2018-11-28T14:26:57

object_type: use new enumeration names Use the new object_type enumeration names within the codebase.

ecf4f33a

2018-02-08T11:14:48

Convert usage of `git_buf_free` to new `git_buf_dispose`

ce7080a0

2018-02-20T10:38:27

diff_tform: fix rename detection with rewrite/delete pair A rewritten file can either be classified as a modification of its contents or of a delete of the complete file followed by an addition of the new content. This distinction becomes important when we want to detect renames for rewrites. Given a scenario where a file "a" has been deleted and another file "b" has been renamed to "a", this should be detected as a deletion of "a" followed by a rename of "a" -> "b". Thus, splitting of the original rewrite into a delete/add pair is important here. This splitting is represented by a flag we can set at the current delta. While the flag is already being set in case we want to break rewrites, we do not do so in case where the `GIT_DIFF_FIND_RENAMES_FROM_REWRITES` flag is set. This can trigger an assert when we try to match the source and target deltas. Fix the issue by setting the `GIT_DIFF_FLAG__TO_SPLIT` flag at the delta when it is a rename target and `GIT_DIFF_FIND_RENAMES_FROM_REWRITES` is set.

80e77b87

2018-02-20T10:03:48

tests: add rename-rewrite scenarios to "renames" repository Add two more scenarios to the "renames" repository. The first scenario has a major rewrite of a file and a delete of another file, the second scenario has a deletion of a file and rename of another file to the deleted file. Both scenarios will be used in the following commit.

d91da1da

2018-02-20T09:54:58

tests: diff::rename: use defines for commit OIDs While we frequently reuse commit OIDs throughout the file, we do not have any constants to refer to these commits. Make this a bit easier to read by giving the commit OIDs somewhat descriptive names of what kind of commit they refer to.

1a79cd95

2016-04-26T01:18:01

patch: show copy information for identical copies When showing copy information because we are duplicating contents, for example, when performing a `diff --find-copies-harder -M100 -B100`, then show copy from/to lines in a patch, and do not show context. Ensure that we can also parse such patches.

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.

f78d9b6c

2015-03-03T23:56:54

diff_tform: account for whitespace options When comparing seemingly blank files, take whitespace options into account.

a212716f

2015-03-03T18:19:42

diff_tform: don't compare empty hashsig_heaps Don't try to compare two empty hashsig_heaps.

659cf202

2015-01-07T12:23:05

Remove the signature from ref-modifying functions The signature for the reflog is not something which changes dynamically. Almost all uses will be NULL, since we want for the repository's default identity to be used, making it noise. In order to allow for changing the identity, we instead provide git_repository_set_ident() and git_repository_ident() which allow a user to override the choice of signature.

36fc5497

2014-12-02T05:11:12

Added GIT_HASHSIG_ALLOW_SMALL_FILES to allow computing signatures for small files The implementation of the hashsig API disallows computing a signature on small files containing only a few lines. This new flag disables this behavior. git_diff_find_similar() sets this flag by default which means that rename / copy detection of small files will now work. This in turn affects the behavior of the git_status and git_blame APIs which will now detect rename of small files assuming the right options are passed.

6affd71f

2014-01-03T17:38:34

git_checkout_opts -> git_checkout_options

c05cd792

2014-01-22T17:51:32

Drop git_patch_to_str It's hard or even impossible to correctly free the string buffer allocated by git_patch_to_str in some circumstances. Drop the function so people have to use git_patch_to_buf instead - git_buf has a dedicated destructor.

0b28217b

2014-01-15T12:51:31

refs: remove the _with_log differentiation Any well-behaved program should write a descriptive message to the reflog whenever it updates a reference. Let's make this more prominent by removing the version without the reflog parameters.

25e0b157

2013-12-06T15:07:57

Remove converting user error to GIT_EUSER This changes the behavior of callbacks so that the callback error code is not converted into GIT_EUSER and instead we propagate the return value through to the caller. Instead of using the giterr_capture and giterr_restore functions, we now rely on all functions to pass back the return value from a callback. To avoid having a return value with no error message, the user can call the public giterr_set_str or some such function to set an error message. There is a new helper 'giterr_set_callback' that functions can invoke after making a callback which ensures that some error message was set in case the callback did not set one. In places where the sign of the callback return value is meaningful (e.g. positive to skip, negative to abort), only the negative values are returned back to the caller, obviously, since the other values allow for continuing the loop. The hardest parts of this were in the checkout code where positive return values were overloaded as meaningful values for checkout. I fixed this by adding an output parameter to many of the internal checkout functions and removing the overload. This added some code, but it is probably a better implementation. There is some funkiness in the network code where user provided callbacks could be returning a positive or a negative value and we want to rely on that to cancel the loop. There are still a couple places where an user error might get turned into GIT_EUSER there, I think, though none exercised by the tests.

7fb4147f

2013-12-06T13:38:59

Don't clobber whitespace settings

628e92cd

2013-12-05T14:47:04

Don't use weird return codes

c56c6d69

2013-12-05T14:13:46

Implement 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.

2123a17f

2013-12-02T13:27:06

Fix bug making split deltas a COPIED targets When FIND_COPIES is used in combination with BREAK_REWRITES for rename detection, there was a bug where the split MODIFIED delta was only used as a target for RENAME records and not for COPIED records. This fixes that, converting the split into a pair of DELETED and COPIED deltas when that circumstance arises.

17820381

2013-11-14T14:05:52

Rename tests-clar to tests

thodg/libgit2/tests/diff/rename.c

tests/diff/rename.c

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