Log

Author Commit Date CI Message
Etienne Samson d3ef11e0 2017-03-19T03:31:41 clar: exit immediately on initialization failure
Etienne Samson 22317057 2017-03-21T00:36:32 https: Prevent OpenSSL from namespace-leaking
Etienne Samson 08c1b8fc 2017-08-28T21:24:13 cmake: simplify some HTTPS tests
Etienne Samson e9369856 2017-03-21T00:25:15 stream: Gather streams to src/streams
Edward Thomson 8f05d2d8 2017-10-20T12:29:53 Merge pull request #4382 from pks-t/pks/cmake-source-dir cmake: use project-relative binary and source directories
Patrick Steinhardt 4da74c83 2017-10-20T07:29:17 cmake: use project-relative binary and source directories Due to our split of CMake files into multiple modules, we had to replace some uses of the `${CMAKE_CURRENT_SOURCE_DIR}` and `${CMAKE_CURRENT_BINARY_DIR}` variables and replace them with `${CMAKE_SOURCE_DIR}` and `${CMAKE_BINARY_DIR}`. This enabled us to still be able to refer to top-level files when defining build instructions inside of a subdirectory. When replacing all variables, it was assumed that the absolute set of variables is always relative to the current project. But in fact, this is not the case, as these variables always point to the source and binary directory as given by the top-levl project. So the change actually broke the ability to include libgit2 directly as a subproject, as source files cannot be found anymore. Fix this by instead using project-specific source and binary directories with `${libgit2_SOURCE_DIR}` and `${libgit2_BINARY_DIR}`.
Patrick Steinhardt 661cf4d4 2017-10-19T08:16:36 Merge pull request #4375 from mhagger/cmake-version-3.0.x Fix compilation for CMake versions 3.0.x where x >= 1
Michael Haggerty 8bbee8f3 2017-10-14T08:36:54 Fix compilation for CMake versions 3.0.x where x >= 1 Apparently policy CMP0015 was added in CMake 3.1. With CMake 3.0.2, the build was failing with CMake Error at CMakeLists.txt:18 (CMAKE_POLICY): Policy "CMP0051" is not known to this version of CMake. This patch makes it work.
Edward Thomson 8ac8c78c 2017-10-09T15:15:08 Merge pull request #4356 from pks-t/pks/static-clar cmake: use static dependencies when building static libgit2
Edward Thomson 34ec6f3a 2017-10-09T15:01:29 Merge pull request #4372 from pks-t/pks/xcode-linking cmake: fix linking in Xcode with object libraries only
Edward Thomson 9840dad2 2017-10-09T14:57:33 Merge pull request #4368 from pks-t/pks/smart-negotiate-revwalk-memleak transports: smart: fix memory leak when skipping symbolic refs
Carlos Martín Nieto fb11544b 2017-10-09T11:59:19 Merge pull request #4371 from pks-t/pks/test-checkout-tree-refactoring tests: checkout::tree: verify status entrycount changes on chmod
Patrick Steinhardt 0e709032 2017-10-09T10:55:02 cmake: fix linking in Xcode with object libraries only CMake is unable to generate a correct Xcode project when trying to link libraries with only object libraries as its input. As our new build infrastructure makes heavy use of object libraries now, this affects our libgit2 library target, as well, leading to linking errors. Fix the issue by adding a dummy file to the libgit2 objects. As we always have the "features.h" header ready which contains defines only, we can simply link it into the resulting library without any effect whatsoever. This fixes building with Xcode.
Patrick Steinhardt 09c15a7f 2017-10-09T09:08:19 tests: checkout::tree: check that the status list catches mode changes While we verify that we have no mode changes after calling `git_checkout_tree`, we do not verify that the `p_chmod` calls actually resulted in a changed entry. While we should assume that this works due to separate tests for the status list, we should test for the change being listed to avoid programming errors in the test.
Patrick Steinhardt 880dfc50 2017-10-09T09:06:24 tests: checkout::tree: extract check for status entrycount There are multiple locations where we have the same code to check whether the count of status list entries of a repository matches an expected number. Extract that into a common function.
Patrick Steinhardt 38e769cb 2017-10-09T09:00:29 Merge pull request #4369 from libgit2/ethomson/checkout_typechange Checkout typechange-only deltas
Patrick Steinhardt 7cb705cb 2017-10-06T12:05:26 transports: smart: fix memory leak when skipping symbolic refs When we setup the revision walk for negotiating references with a remote, we iterate over all references, ignoring tags and symbolic references. While skipping over symbolic references, we forget to free the looked up reference, resulting in a memory leak when the next iteration simply overwrites the variable. Fix that issue by freeing the reference at the beginning of each iteration and collapsing return paths for error and success.
Edward Thomson 21e6a11a 2017-10-07T12:55:16 Merge pull request #4359 from libgit2/cmn/proxy-options-free Plug some leaks in curl's proxy handling
Edward Thomson 19e8faba 2016-06-15T01:59:56 checkout: test force checkout when mode changes Test that we can successfully force checkout a target when the file contents are identical, but the mode has changed.
Edward Thomson 128c5ca9 2017-10-07T12:23:33 checkout: do not test file mode on Windows On Windows, we do not support file mode changes, so do not test for type changes between the disk and tree being checked out. We could have false positives since the on-disk file can only have an (effective) mode of 0100644 since NTFS does not support executable files. If the tree being checked out did have an executable file, we would erroneously decide that the file on disk had been changed.
Carlos Martín Nieto 25fdb3f0 2017-10-07T11:25:12 proxy: rename the options freeing function
Edward Thomson 58deac77 2017-10-07T02:06:43 Merge pull request #4370 from libgit2/example_general Fix Issue #4047 Check return codes and free objects
Edward Thomson e523826c 2017-10-07T01:38:53 Merge pull request #4321 from libgit2/ethomson/libcurl_build travis: add custom apt sources
Douglas Swanson f4770e47 2017-01-01T09:28:39 Fix Issue #4047 Check return codes and free objects
Edward Thomson 668fa071 2017-10-07T00:26:21 Merge pull request #4363 from cjhoward92/typedef-push-update-reference remote: add typedef to normalize push_update_reference callback
Edward Thomson e2e3943d 2017-10-07T00:22:22 Merge pull request #4367 from pks-t/pks/peel-peeled-to-tag refs: do not use peeled OID if peeling to a tag
Edward Thomson 9dc21efd 2017-10-07T00:10:06 travis: add custom apt sources Move back to Travis's VM infrastructure for efficiency.
Edward Thomson 752b7c79 2016-06-15T02:00:35 checkout: treat files as modified if mode differs When performing a forced checkout, treat files as modified when the workdir or the index is identical except for the mode. This ensures that force checkout will update the mode to the target. (Apply this check for regular files only, if one of the items was a file and the other was another type of item then this would be a typechange and handled independently.)
Carson Howard 7138ce37 2017-10-06T07:16:26 remote: add typedef to normalize push_update_reference callback Very many callbacks in libgit2 have some sort of typedef to normalize the name at git_<name_of_operation>_cb. Add a typedef for push_update_references in the remote so the name follows the same conventions.
Patrick Steinhardt 62ac3931 2017-10-06T14:57:02 Merge pull request #4362 from jacwah/graphdoc Document that a commit is not a descendant of itself
Jacob Wahlgren 56ac6c0a 2017-09-30T17:23:11 graph: document that a commit isn't a descendant of itself
Patrick Steinhardt ec76cc48 2017-10-06T13:58:19 Merge pull request #4364 from andoma/master Use SOCK_CLOEXEC when creating sockets
Patrick Steinhardt b112b1e9 2017-10-06T11:24:11 refs: do not use peeled OID if peeling to a tag If a reference stored in a packed-refs file does not directly point to a commit, tree or blob, the packed-refs file will also will include a fully-peeled OID pointing to the first underlying object of that type. If we try to peel a reference to an object, we will use that peeled OID to speed up resolving the object. As a reference for an annotated tag does not directly point to a commit, tree or blob but instead to the tag object, the packed-refs file will have an accomodating fully-peeled OID pointing to the object referenced by that tag. When we use the fully-peeled OID pointing to the referenced object when peeling, we obviously cannot peel that to the tag anymore. Fix this issue by not using the fully-peeled OID whenever we want to peel to a tag. Note that this does not include the case where we want to resolve to _any_ object type. Existing code may make use from the fact that we resolve those to commit objects instead of tag objects, even though that behaviour is inconsistent between packed and loose references. Furthermore, some tests of ours make the assumption that we in fact resolve those references to a commit.
Andreas Smas 9fe70c9e 2017-01-20T23:14:19 Use SOCK_CLOEXEC when creating sockets
Carlos Martín Nieto c7c5f2c4 2017-09-28T18:28:37 Merge pull request #4339 from pks-t/pks/static-linking Static linking for bundled deps
Carlos Martín Nieto 366f4136 2017-09-28T17:19:56 travis: keep installing our custom libcurl build The block in the script installs the packages if we're _not_ on Precise. This was dropped in c17c3f8a ("travis: drop support for Ubuntu Precise") in error.
Carlos Martín Nieto 6f8d1eb9 2017-09-27T15:30:19 curl: free the user-provided proxy credentials
Carlos Martín Nieto 406b47bf 2017-09-27T15:27:32 curl: free the proxy options
Carlos Martín Nieto 44527f5c 2017-09-27T15:17:26 proxy: add a free function for the options's pointers When we duplicate a user-provided options struct, we're stuck with freeing the url in it. In case we add stuff to the proxy struct, let's add a function in which to put the logic.
Patrick Steinhardt 49551254 2017-09-22T09:34:37 cmake: use static dependencies when building static libgit2 CMake allows us to build a static library by simply setting the variable `BUILD_SHARED_LIBS` to `OFF`. While this causes us to create a static libgit2.a archive, it will not automatically cause CMake to only locate static archives when searching for dependencies. This does no harm in case of building our libgit2.a, as we do not want to include all required dependencies in the resulting archive anyway. Instead, we ask users of a static libgit2.a to link against the required set of static archives themselves, typically aided by the libgit2.pc file. Where it does cause harm, though, is when we build the libgit2_clar test suite. CMake has happily populated our LIBGIT2_LIBS variable with shared libraries, and so linking the final libgit2_clar test does not do the right thing. It will simply ignore those shared libraries, we end up with a test suite with undefined symbols. To fix the issue, we can instruct CMake to only locate libraries with a certain suffix. As static libraries are typically identifiable by their ".a" suffix on Unix-based systems, we can instruct CMake to only locate libraries with this suffix to restrict it from finding any shared libraries. This fixes building a static libgit2_clar test suite. Note that this ignores the problem on Windows. The problem here is that we cannot even distinguish static and dynamic libraries by only inspecting their suffix. So we just ignore the problem on Windows, for now.
Patrick Steinhardt 8c19969a 2017-09-06T07:38:48 cmake: fix static linking for bundled deps Our bundled deps are being built as simple static libraries which are then linked into the libgit2 library via `TARGET_LINK_LIBRARIES`. While this works for a dynamically built libgit2 library, using this function to link two static libraries does not have the expected outcome of merging those static libraries into one big library. This leads to symbols of our bundled deps being undefined in the resulting libgit2 archive. As we have bumped our minimum CMake version to 2.8.11, we can now easily make use of object libraries for our bundled dependencies. So build instructions are still self-contained inside of the dependency directories and the resulting object libraries can just be added to the LIBGIT2_OBJECTS list, which will cause them to be linked into the final resulting static library. This fixes the issue of undefined symbols.
Patrick Steinhardt d8d2f21e 2017-09-06T07:52:12 cmake: unify version check for target include directories There are two locations where we check whether CMake supports `TARGET_INCLUDE_DIRECTORIES`. While the first one uses `VERSION_LESS 2.8.12`, the second one uses `VERSION_GREATER 2.8.11`, which are obviously equivalent to each other. It'd still be easier to grep for specific CMake versions being required for some features if both used the same conditional mentioning the actual target version required. So this commit refactors these conditions to make them equal.
Patrick Steinhardt 172a585f 2017-09-05T15:09:34 cmake: always use object library for git2internal As we have bumped our minimum CMake version to 2.8.11, we can now unconditionally make use of object libraries. So remove the version check for the git2internal object library and always use it.
Patrick Steinhardt cf9f3452 2017-09-06T07:38:32 cmake: bump minimum version to 2.8.11 Our current minimum CMake version is 2.8. This version does not yet allow us to use object libraries (introduced in 2.8.8) and target include directories (introduced in 2.8.12), which are both mechanisms we want to use to fix some specific problems. We previously were not able to bump our CMake version to a version supporting object libraries because Ubuntu Precise only had CMake version 2.8.7 in its repositories. But due to Precise being end of life now, we shouldn't need to honor it anymore. A current survey of some of the more conservative distributions brings up the following versions of CMake: - CentOS 5: 2.6.2 - CentOS 6: 2.8.12.2 - Debian 7: 2.8.11 - Fedora 23: 3.3.2 - OpenSUSE 13.2: 3.0.2 - Ubuntu Precise: 2.8.7 - Ubuntu Trusty: 2.8.12 The only two outliers here are CentOS 5 and Ubuntu Precise. CentOS is currently unsupported due to our minimum version being 2.8 and Ubuntu Precise is not maintained anymore. So the next smallest version supported by all major distributions is 2.8.11. While this does not yet support target include directories, it at least enables us to use object libraries. So this becomes our new minimum required version.
Patrick Steinhardt 1d9dd882 2017-09-05T15:06:29 cmake: distinguish libgit2 objects and sources Distinguish variables keeping track of our internal libgit2 sources and the final objects which shall be linked into the library. This will ease the transition to use object libraries for our bundled dependencies instead of linking them in.
Patrick Steinhardt c17c3f8a 2017-09-06T08:04:19 travis: drop support for Ubuntu Precise Ubuntu Precise is end of life since April 2017. At that point in time, Precise was still the main distro on which Travis CI built upon, with the Trusty-based images still being in a beta state. But since June 21st, Trusty has officially moved out of beta and is now the default image for all new builds. Right now, we build on both old and new images to assure we support both. Unfortunately, this leaves us with the highest minimum version for CMake being 2.8.7, as Precise has no greater version in its repositories. And because of this limitation, we cannot actually use object libraries in our build instructions. But considering Precise is end of life and Trusty is now the new default for Travis, we can and should drop support for this old and unmaintained distribution. And so we do.
Edward Thomson 524c1d3c 2017-09-20T07:48:19 Merge pull request #4334 from pks-t/pks/reproducible-builds Reproducible builds
Edward Thomson 212da30d 2017-09-16T19:49:04 Merge pull request #4348 from pks-t/pks/win32-hash-memleak diff: cleanup hash ctx in `git_diff_patchid`
Edward Thomson d378e384 2017-09-15T17:53:01 Merge pull request #4347 from pks-t/pks/appveyor-vs2015 Fix AppVeyor build failures due to CRTDBG linking issue
Patrick Steinhardt 03a95bc5 2017-09-15T11:32:46 appveyor: add jobs to also build on Visual Studio 2015 In order to cover a wider range of build environments, add two more jobs which build and test libgit2 on Visual Studio 14 2015.
Patrick Steinhardt e1076dbf 2017-09-15T10:01:36 appveyor: explicitly specify build images AppVeyor currently does provide three standard build worker images with VS2013, VS2015 and VS2017. Right now, we are using the implicitly, which is the VS2015 one. We want to be more explicit about this, so that we can easily switch build images based on the job. So starting from this commit, we explicitly set the `APPVEYOR_BUILD_WORKER_IMAGE` variable per job, which enables us to choose different images. To be able to test a wider range of build configurations, this commit also switches the jobs for VC2010 over to use the older, VS2013 based images. As the next commit will introduce two new jobs for building with VS2015, we have then covered both build environments. Also, let us be a bit more explicit regarding the CMake generator. Instead of only saying "Visual Studio 10", use the more descriptive value "Visual Studio 10 2010" to at least avoid some confusion surrounding the versioning scheme of Visual Studio.
Patrick Steinhardt 54214d61 2017-09-15T10:28:32 cmake: fix linker error with dbghelper library When the MSVC_CRTDBG option is set by the developer, we will link in the dbghelper library to enable memory lead detection in MSVC projects. We are doing so by adding it to the variable `CMAKE_C_STANDARD_LIBRARIES`, so that it is linked for every library and executable built by CMake. But this causes our builds to fail with a linker error: ``` LINK: fatal error LNK1104: cannot open file 'advapi32.lib;Dbghelp.lib' ``` The issue here is that we are treating the variable as if it were an array of libraries by setting it via the following command: ``` SET(CMAKE_C_STANDARD_LIBRARIES "${CMAKE_C_STANDARD_LIBRARIES}" "Dbghelp.lib") ``` The generated build commands will then simply stringify the variable, concatenating all the contained libraries with a ";". This causes the observed linking failure. To fix the issue, we should just treat the variabable as a simple string. So instead of adding multiple members, we just add the "Dbghelp.lib" library to the existing string, separated by a space character.
Patrick Steinhardt 046b081a 2017-09-15T10:46:26 diff: cleanup hash ctx in `git_diff_patchid` After initializing the hash context in `git_diff_patchid`, we never proceed to call `git_hash_ctx_cleanup` on it. While this doesn't really matter on most hash implementations, this causes a memory leak on Win32 due to CNG system requiring a `malloc` call. Fix the memory leak by always calling `git_hash_ctx_cleanup` before exiting.
Patrick Steinhardt d630887b 2017-08-30T21:47:12 cmake: enable reproducible static linking By default, both ar(1) and ranlib(1) will insert additional information like timestamps into generated static archives and indices. As a consequence, generated static archives are not deterministic when created with default parameters. Both programs do support a deterministic mode, which will simply zero out undeterministic information with `ar D` and `ranlib -D`. Unfortunately, CMake does not provide an easy knob to add these command line parameters. Instead, we have to redefine the complete command definitons stored in the variables CMAKE_C_ARCHIVE_CREATE, CMAKE_C_ARCHIVE_APPEND and CMAKE_C_ARCHIVE_FINISH. Introduce a new build option `ENABLE_REPRODUCIBLE_BUILDS`. This option is available on Unix-like systems with the exception of macOS, which does not have support for the required flags. If the option is being enabled, we add those flags to the invocation of both `ar` and `ranlib` to enable deterministically building the static archive.
Edward Thomson e098b5f5 2017-09-12T20:21:27 Merge pull request #4344 from slavikus/fix-dirty-buffer-in-git-push-update-tips Clear the remote_ref_name buffer in git_push_update_tips()
Edward Thomson 71a8204d 2017-09-12T20:20:48 Merge pull request #4346 from pks-t/pks/wo-features-header features.h: allow building without CMake-generated feature header
Patrick Steinhardt 26f531d3 2017-09-12T13:35:18 features.h: allow building without CMake-generated feature header In commit a390a8464 (cmake: move defines into "features.h" header, 2017-07-01), we have introduced a new "features.h" header. This file is being generated by the CMake build system based on how the libgit2 build has been configured, replacing the preexisting method of simply setting the defines inside of the CMake build system. This was done to help splitting up the build instructions into multiple separate subdirectories. An overlooked shortcoming of this approach is that some projects making use of libgit2 build the library with custom build systems, without making use of CMake. For those users, the introduction of the "features.h" file makes their life harder as they would have to also generate this file. Fix this issue by guarding all inclusions of the generated header file by the `LIBGIT2_NO_FEATURES_H` define. Like this, other build systems can skip the feature header and simply define all used features by specifying `-D` flags for the compiler again.
Slava Karpenko b34fc3fd 2017-09-11T21:34:41 Clear the remote_ref_name buffer in git_push_update_tips() If fetch_spec was a non-pattern, and it is not the first iteration of push_status vector, then git_refspec_transform would result in the new value appended via git_buf_puts to the previous iteration value. Forcibly clearing the buffer on each iteration to prevent this behavior.
Carlos Martín Nieto 5b947b62 2017-09-10T14:47:04 Merge pull request #4342 from mothacehe/master README: Mention Guile-Git bindings.
Mathieu Othacehe b4e0d293 2017-09-09T09:54:58 README: Mention Guile-Git bindings.
Patrick Steinhardt 583e4141 2017-08-30T14:35:57 tests: deterministically generate test suite definitions The script "generate.py" is used to parse all test source files for unit tests. These are then written into a "clar.suite" file, which can be included by the main test executable to make available all test suites and unit tests. Our current algorithm simply collects all test suites inside of a dict, iterates through its items and dumps them in a special format into the file. As the order is not guaranteed to be deterministic for Python dictionaries, this may result in arbitrarily ordered C structs. This obviously defeats the purpose of reproducible builds, where the same input should always result in the exact same output. Fix this issue by sorting the test suites by name previous to dumping them as structs. This enables reproducible builds for the libgit2_clar file.
Edward Thomson 3c216453 2017-08-25T21:06:46 Merge pull request #4296 from pks-t/pks/pattern-based-gitignore Fix negative ignore rules with patterns
Edward Thomson 4b000fc0 2017-08-25T21:05:20 Merge pull request #4305 from pks-t/pks/submodule-with-bare-repo Submodules with bare repo
Edward Thomson bcb7e92d 2017-08-25T21:04:04 Merge pull request #4279 from pks-t/pks/error-builds -Werror builds for Travis
Patrick Steinhardt 477b3e04 2017-07-10T12:25:43 submodule: refuse lookup in bare repositories While it is technically possible to look up submodules inside of a bare repository by reading the submodule configuration of a specific commit, we do not offer this functionality right now. As such, calling both `git_submodule_lookup` and `git_submodule_foreach` should error out early when these functions encounter a bare repository. While `git_submodule_lookup` already does return an error due to not being able to parse the configuration, `git_submodule_foreach` simply returns success and never invokes the callback function. Fix the issue by having both functions check whether the repository is bare and returning an error in that case.
Patrick Steinhardt a889c05f 2017-07-10T11:55:33 tests: submodule: add explicit cleanup function in lookup tests
Patrick Steinhardt 64d1e0b3 2017-07-10T11:52:08 tests: submodule: fix declaration of test The testcase "submodule::lookup::cached" was declared with a single underscore separating the test suide and test name, only. As the clar parser only catches tests with two underscores, it was never executed. Add in the second underscore to actually have it detected and executed.
Patrick Steinhardt 2d9ff8f5 2017-07-10T09:36:19 ignore: honor case insensitivity for negative ignores When computing negative ignores, we throw away any rule which does not undo a previous rule to optimize. But on case insensitive file systems, we need to keep in mind that a negative ignore can also undo a previous rule with different case, which we did not yet honor while determining whether a rule undoes a previous one. So in the following example, we fail to unignore the "/Case" directory: /case !/Case Make both paths checking whether a plain- or wildcard-based rule undo a previous rule aware of case-insensitivity. This fixes the described issue.
Patrick Steinhardt 38b44c3b 2017-07-07T17:10:57 tests: status: additional test for negative ignores with pattern This test is by Carlos Martín Nieto.
Patrick Steinhardt b8922fc8 2017-07-07T13:27:27 ignore: keep negative rules containing wildcards Ignore rules allow for reverting a previously ignored rule by prefixing it with an exclamation mark. As such, a negative rule can only override previously ignored files. While computing all ignore patterns, we try to use this fact to optimize away some negative rules which do not override any previous patterns, as they won't change the outcome anyway. In some cases, though, this optimization causes us to get the actual ignores wrong for some files. This may happen whenever the pattern contains a wildcard, as we are unable to reason about whether a pattern overrides a previous pattern in a sane way. This happens for example in the case where a gitignore file contains "*.c" and "!src/*.c", where we wouldn't un-ignore files inside of the "src/" subdirectory. In this case, the first solution coming to mind may be to just strip the "src/" prefix and simply compare the basenames. While that would work here, it would stop working as soon as the basename pattern itself is different, like for example with "*x.c" and "!src/*.c. As such, we settle for the easier fix of just not optimizing away rules that contain a wildcard.
Patrick Steinhardt 4467543e 2017-07-07T12:27:43 ignore: return early to avoid useless indentation
Patrick Steinhardt 9bd83622 2017-07-07T12:27:18 ignore: fix indentation of comment block
Patrick Steinhardt 414a3384 2017-08-25T17:36:59 travis: error on compiler warnings One of our goals is to have our code free of any warnings. Due to the recent switch to Ubuntu 14.04 on Travis, the last warning regarding some preprocessor-magic in the curl-headers has been fixed and as such, the goal of zero warnings is now reached for Travis CI. In order to avoid introducing new warnings via pull requests, we can now enable building with `-Werror` and turn compiler warnings into errors instead, causing the CI jobs to fail. This build does so by passing the newly introdcued `-DENABLE_WERROR` flag to CMake for all Travis jobs.
Patrick Steinhardt 175ab8e7 2017-08-25T17:36:24 cmake: add switch to build with -Werror Add a simple switch to enable building with "-Werror=<warning>" instead of "-W<warning". Due to the encapsulated `ENABLE_WARNINGS` macro, this is as simple as adding a new variable "ENABLE_WERROR`, which can be passed on the command line via `-DENABLE_WERROR=ON`. The variable defaults to NO to not bother developers in their day to day work.
Patrick Steinhardt 4a46a8c1 2017-08-25T17:32:54 cmake: encapsulate enabling/disabling compiler warnings There are multiple sites where we enable or disable compiler warning via "-W<warning>" or "-Wno-<warning>". As we want to extend this mechanism later on to conditionally switch these over to "-Werror=<warning>", we encapsulate the logic into its their own macros `ENABLE_WARNINGS` and `DISABLE_WARNINGS`. Note that we in fact have to use a macro here. Using a function would not modify the CFLAGS inside of the callers scope, but in the function's scope only.
Edward Thomson 0a93ded1 2017-08-24T21:23:58 Merge pull request #4282 from pks-t/pks/remove-unused-clar-fixtures Split up CMakeLists.txt build instructions
Patrick Steinhardt a3a35473 2017-08-17T08:38:47 cmake: fix output location of import libraries and DLLs As observed by Edward Thomson, the libgit2 DLL built by Windows will not end up in the top-level build directory but instead inside of the 'src/' subdirectory. While confusing at first because we are actually setting the LIBRARY_OUTPUT_DIRECTORY to the project's binary directory, the manual page of LIBRARY_OUTPUT_DIRECTORY clears this up: There are three kinds of target files that may be built: archive, library, and runtime. Executables are always treated as runtime targets. Static libraries are always treated as archive targets. Module libraries are always treated as library targets. For non-DLL platforms shared libraries are treated as library targets. For DLL platforms the DLL part of a shared library is treated as a runtime target and the corresponding import library is treated as an archive target. All Windows-based systems including Cygwin are DLL platforms. So in fact, DLLs and import libraries are not treated as libraries at all by CMake but instead as runtime and archive targets. To fix the issue, we can thus simply set the variables RUNTIME_OUTPUT_DIRECTORY and ARCHIVE_OUTPUT_DIRECTORY to the project's root binary directory.
Patrick Steinhardt 8a43161b 2017-07-05T12:18:17 cmake: always include our own headers first With c26ce7840 (Merge branch 'AndreyG/cmake/modernization', 2017-06-28), we have recently introduced a regression in the way we are searching for headers. We have made sure to always include our own headers first, but due to the changes in c26ce7840 this is no longer guaranteed. In fact, this already leads the compiler into picking "config.h" from the "deps/regex" dependency, if it is used. Fix the issue by declaring our internal include directories up front, before any of the other search directories is added.
Patrick Steinhardt e5c9723d 2017-06-30T18:12:02 cmake: move library build instructions into subdirectory To fix leaking build instructions into different targets and to make the build instructions easier to handle, create a new CMakeLists.txt file containing build instructions for the libgit2 target. By now, the split is rather easy to achieve. Due to the preparatory steps, we can now simply move over all related build instructions, only needing to remove the "src/" prefix from some files.
Patrick Steinhardt 72f27cb6 2017-06-30T17:02:00 cmake: fix up source and binary directory paths There are quite some uses of the variables "${CMAKE_CURRENT_SOURCE_DIR}" and "${CMAKE_CURRENT_BINARY_DIR}" where they are not appropriate. Convert these sites to instead use the variables "${CMAKE_SOURCE_DIR}" and "${CMAKE_BINARY_DIR}", which instead point to the project's root directory. This will ease splitting up the library build instructions into its own subdirectory.
Patrick Steinhardt 1f43a43d 2017-06-28T13:28:33 cmake: move zlib build instructions into subdirectory Extract code required to build the zlib library into its own CMakeLists.txt, which is included as required.
Patrick Steinhardt b7514554 2017-06-28T13:25:09 cmake: move http-parser build instructions into subdirectory Extract code required to build the http-parser library into its own CMakeLists.txt, which is included as required.
Patrick Steinhardt 9e449e52 2017-06-28T13:23:45 cmake: move regex build instructions into subdirectory Extract code required to build the regex library into its own CMakeLists.txt, which is included as required.
Patrick Steinhardt 43248500 2017-06-28T13:21:09 cmake: move winhttp build instructions into subdirectory Extract code required to build the winhttp library into its own CMakeLists.txt, which is included as required.
Patrick Steinhardt bed7ca3a 2017-06-30T16:57:16 cmake: define WIN_RC with other platform sources This makes splitting up the library build instructions later on more obvious and easier to achieve.
Patrick Steinhardt 8ee90c39 2017-06-28T13:16:38 cmake: find dependencies after setting build flags This makes splitting up the library build instructions later on more obvious and easier to achieve.
Patrick Steinhardt c3635130 2017-06-28T13:14:23 cmake: move definition of Win32 flags together This makes splitting up the library build instructions later on more obvious and easier to achieve.
Patrick Steinhardt 32a2e500 2017-07-01T13:41:36 cmake: inline TARGET_OS_LIBRARIES function Previous to keeping track of libraries and linking directories via variables, we had two call sites of the `TARGET_OS_LIBRARIES` function to avoid duplicating knowledge on required operating system library dependencies. But as the libgit2_clar target now re-uses defined variables to link against these libraries, we can simply inline the function.
Patrick Steinhardt 8e31cc25 2017-06-28T12:51:14 cmake: keep track of libraries and includes via lists Later on, we will move detection of required libraries, library directories as well as include directories into a separate CMakeLists.txt file inside of the source directory. Obviously, we want to avoid duplication here regarding these parameters. To prepare for the split, put the parameters into three variables LIBGIT2_LIBS, LIBGIT2_LIBDIRS and LIBGIT2_INCLUDES, tracking the required libraries, linking directory as well as include directories. These variables can later be exported into the parent scope from inside of the source build instructions, making them readily available for the other subdirectories.
Patrick Steinhardt dd332e2a 2017-06-23T20:42:41 cmake: use absolute path to deps When refering to files and directories inside of the top-level "deps/" directory, we're being inconsistent in using relative or absolute paths. To enable splitting out parts of the top-level CMakeLists.txt into an own file in the "src/" directory, consistently switch over to use absolute paths to avoid errors when converting.
Patrick Steinhardt 8341d6cf 2017-07-04T10:57:28 cmake: move regcomp and futimens checks to "features.h" In our CMakeLists.txt, we have to check multiple functions in order to determine if we have to use our own or whether we can use the platform-provided one. For two of these functions, namely `regcomp_l()` and `futimens`, the defined macro is actually used inside of the header file "src/unix/posix.h". As such, these macros are not only required by the library, but also by our test suite, which is makes use of internal headers. To prepare for the CMakeLists.txt split, move these two defines inside of the "features.h" header.
Patrick Steinhardt a390a846 2017-07-01T13:06:00 cmake: move defines into "features.h" header In a future commit, we will split out the build instructions for our library directory and move them into a subdirectory. One of the benefits is fixing scoping issues, where e.g. defines do not leak to build targets where they do not belong to. But unfortunately, this does also pose the problem of how to propagate some defines which are required by both the library and the test suite. One way would be to create another variable keeping track of all added defines and declare it inside of the parent scope. While this is the most obvious and simplest way of going ahead, it is kind of unfortunate. The main reason to not use this is that these defines become implicit dependencies between the build targets. By simply observing a define inside of the CMakeLists.txt file, one cannot reason whether this define is only required by the current target or whether it is required by different targets, as well. Another approach would be to use an internal header file keeping track of all defines shared between targets. While configuring the library, we will set various variables and let CMake configure the file, adding or removing defines based on what has been configured. Like this, one can easily keep track of the current environment by simply inspecting the header file. Furthermore, these dependencies are becoming clear inside the CMakeLists.txt, as instead of simply adding a define, we now call e.g. `SET(GIT_THREADSAFE 1)`. Having this header file though requires us to make sure it is always included before any "#ifdef"-preprocessor checks are executed. As we have already refactored code to always include the "common.h" header file before any statement inside of a file, this becomes easy: just make sure "common.h" includes the new "features.h" header file first.
Patrick Steinhardt 35087f0e 2017-06-28T15:42:54 cmake: create separate CMakeLists.txt for tests Our CMakeLists.txt is very unwieldy in its current size, spanning more than 700 lines of code. Furthermore, it has several issues regarding scoping, where for example some defines, includes, etc. from our test suite are also applied to our normal library code. To fix this, we can separate out build instructions for our tests and move them into their own CMakeLists.txt in the "tests" directory. This reduced complexity of the root CMakeLists.txt file and fixes the issues regarding leaking build context from tests into the library.
Patrick Steinhardt 3267115f 2017-06-28T15:41:15 cmake: create own precompiled headers for tests As soon as we split up our CMakeBuild.txt build instructions, we will be unable to simply link against the git2 library's precompiled header from other targets. To avoid this future breakage, create a new precompiled header for our test suite. Next to being compatible with the split, this enables us to also include additional files like the clar headers, which may help speeding up compilation of the test suite.
Patrick Steinhardt caab8270 2017-06-23T19:07:01 cmake: create object library target Currently, we're compiling our library code twice, once as part of the libgit2 library and once for the libgit2_clar executable. Since CMake 2.8.8, there exists a new library type OBJECT, which represents an intermediate target which can then subsequently be used when linking several targets against the same set of objects. Use an OBJECT library to create an internal library for linking. This new target is only used on CMake v2.8.8 or newer. As CMake 3.0 changed the way how generator expressions are evaluated when accessing properties, we need to enable CMake policy 0051 to keep `IDE_SPLIT_SOURCES` functioning.
Patrick Steinhardt f33911e5 2017-06-23T18:32:48 cmake: remove unused variable "CLAR_RESOURCES" Once upon a time, the `CLAR_RESOURCES` variable was intended to set the `CLAR_RESOURCES` define. But actually, the define uses a wrong variable name by accident, hinting that its value cannot actually be used at all, as it is empty. Searching through the code base confirms the guess that the define is not used at all. Remove both the variable and definition.
Patrick Steinhardt 096a49c0 2017-07-03T08:45:57 cmake: try to detect threads library While we already make use of the variable `${CMAKE_THREAD_LIBS_INIT}`, it is actually undefined due to us never including the "FindThreads" module in the CMakeLists.txt. It is rather curious as to why this has never triggered any error up to now, but it does in fact result in linking errors on some Unix platforms as soon as we split up our build instructions into multiple files. Fix the issue now to avoid future breakage by including the "FindThreads" module.
Edward Thomson 1560b580 2017-08-15T10:35:47 Merge pull request #4288 from pks-t/pks/include-fixups Include fixups
Edward Thomson 6be167f1 2017-08-14T22:04:29 Merge pull request #4330 from alpha0010/patch-1 Docs: Fix inline comments for git_diff_hunk
Edward Thomson 577aeef7 2017-08-14T22:02:26 Merge pull request #4328 from libgit2/peff/hashcmp-is-memcmp oid: use memcmp in git_oid__hashcmp