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![Masahiro Yamada](/assets/img/avatar_default.png)
In short, the motivation of this commit is to build a source package without cleaning the source tree. The deb-pkg and (src)rpm-pkg targets first run 'make clean' before creating a source tarball. Otherwise build artifacts such as *.o, *.a, etc. would be included in the tarball. Yet, the tarball ends up containing several garbage files since 'make clean' does not clean everything. Cleaning the tree every time is annoying since it makes the incremental build impossible. It is desirable to create a source tarball without cleaning the tree. In fact, there are some ways to achieve this. The easiest solution is 'git archive'. 'make perf-tar*-src-pkg' uses it, but I do not like it because it works only when the source tree is managed by git, and all files you want in the tarball must be committed in advance. I want to make it work without relying on git. We can do this. Files that are ignored by git are generated files, so should be excluded from the source tarball. We can list them out by parsing the .gitignore files. Of course, .gitignore does not cover all the cases, but it works well enough. tar(1) claims to support it: --exclude-vcs-ignores Exclude files that match patterns read from VCS-specific ignore files. Supported files are: .cvsignore, .gitignore, .bzrignore, and .hgignore. The best scenario would be to use 'tar --exclude-vcs-ignores', but this option does not work. --exclude-vcs-ignore does not understand any of the negation (!), preceding slash, following slash, etc.. So, this option is just useless. Hence, I wrote this gitignore parser. The previous version [1], written in Python, was so slow. This version is implemented in C, so it works much faster. I imported the code from git (commit: 23c56f7bd5f1), so we get the same result. This tool traverses the source tree, parsing all .gitignore files, and prints file paths that are ignored by git. The output is similar to 'git ls-files --ignored --directory --others --exclude-per-directory=.gitignore', except [1] Not sorted [2] No trailing slash for directories [2] is intentional because tar's --exclude-from option cannot handle trailing slashes. [How to test this tool] $ git clean -dfx $ make -s -j$(nproc) defconfig all # or allmodconifg or whatever $ git archive -o ../linux1.tar --prefix=./ HEAD $ tar tf ../linux1.tar | LANG=C sort > ../file-list1 # files emitted by 'git archive' $ make scripts_package HOSTCC scripts/list-gitignored $ scripts/list-gitignored --prefix=./ -o ../exclude-list $ tar cf ../linux2.tar --exclude-from=../exclude-list . $ tar tf ../linux2.tar | LANG=C sort > ../file-list2 # files emitted by 'tar' $ diff ../file-list1 ../file-list2 | grep -E '^(<|>)' < ./Documentation/devicetree/bindings/.yamllint < ./drivers/clk/.kunitconfig < ./drivers/gpu/drm/tests/.kunitconfig < ./drivers/hid/.kunitconfig < ./fs/ext4/.kunitconfig < ./fs/fat/.kunitconfig < ./kernel/kcsan/.kunitconfig < ./lib/kunit/.kunitconfig < ./mm/kfence/.kunitconfig < ./tools/testing/selftests/arm64/tags/ < ./tools/testing/selftests/arm64/tags/.gitignore < ./tools/testing/selftests/arm64/tags/Makefile < ./tools/testing/selftests/arm64/tags/run_tags_test.sh < ./tools/testing/selftests/arm64/tags/tags_test.c < ./tools/testing/selftests/kvm/.gitignore < ./tools/testing/selftests/kvm/Makefile < ./tools/testing/selftests/kvm/config < ./tools/testing/selftests/kvm/settings The source tarball contains most of files that are tracked by git. You see some diffs, but it is just because some .gitignore files are wrong. $ git ls-files -i -c --exclude-per-directory=.gitignore Documentation/devicetree/bindings/.yamllint drivers/clk/.kunitconfig drivers/gpu/drm/tests/.kunitconfig drivers/hid/.kunitconfig fs/ext4/.kunitconfig fs/fat/.kunitconfig kernel/kcsan/.kunitconfig lib/kunit/.kunitconfig mm/kfence/.kunitconfig tools/testing/selftests/arm64/tags/.gitignore tools/testing/selftests/arm64/tags/Makefile tools/testing/selftests/arm64/tags/run_tags_test.sh tools/testing/selftests/arm64/tags/tags_test.c tools/testing/selftests/kvm/.gitignore tools/testing/selftests/kvm/Makefile tools/testing/selftests/kvm/config tools/testing/selftests/kvm/settings [1]: https://lore.kernel.org/all/20230128173843.765212-1-masahiroy@kernel.org/ Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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191 B
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12 lines
191 B
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# SPDX-License-Identifier: GPL-2.0-only
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/asn1_compiler
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/generate_rust_target
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/insert-sys-cert
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/kallsyms
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/list-gitignored
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/module.lds
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/recordmcount
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/sign-file
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/sorttable
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/target.json
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/unifdef
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