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Diffstat (limited to 'doc/treepkg.md')
| -rw-r--r-- | doc/treepkg.md | 57 |
1 files changed, 28 insertions, 29 deletions
diff --git a/doc/treepkg.md b/doc/treepkg.md index aca7f2a..b701aa1 100644 --- a/doc/treepkg.md +++ b/doc/treepkg.md @@ -1,48 +1,47 @@ # TreePKG -`treepkg` is a tool for recursively building packages from an ABS tree. It has +`treepkg` is a tool for recursively building packages from an ABS tree. It has been tested while building packages for the mips64el port and it has proven to be useful. It was written having in mind the experience of `fullpkg`, which converted to -`fullpkg-ng` and then splitted into `fullpkg-build` and `fullpkg-find`. It's +`fullpkg-ng` and then splitted into `fullpkg-build` and `fullpkg-find`. It's aim is to simplify algorithms implemented on the fullpkg family, while solving some design issues that made fullpkg miss some packages sometimes. ## Requirements -`treepkg` needs the help of `toru-path` for "indexing" an ABS tree. `toru-path` +`treepkg` needs the help of `toru-path` for "indexing" an ABS tree. `toru-path` stores a tokyocabinet database of "pkgname" => "path" pairs, where pkgname is replaced by the "pkgbase", "pkgname", and "provides" fields of a PKGBUILD, followed by the path of the current PKGBUILD. -This information is then used by `treepkg` to know where to find the PKGBUILD -of a package. The fullpkg family needed to guess this by traversing the full -ABS tree, and therefore it was unable to find pkgnames that differ from -pkgbase. +This information is then used by `treepkg` to know where to find the PKGBUILD of +a package. The fullpkg family needed to guess this by traversing the full ABS +tree, and therefore it was unable to find pkgnames that differ from pkgbase. So, to use `treepkg` you need to run `toru-path` after the ABS tree update. > Split PKGBUILDs make it difficult to extract metadata if it's stored inside -> package() functions. This will happen with the provides field and `treepkg` +> package() functions. This will happen with the provides field and `treepkg` > won't find that linux-libre-headers provides linux-headers, for instance. ## How does it work `treepkg` must be run from the path of the PKGBUILD you're going to build (this -may change over time). This will be DEPTH=0 and it will create a temporary -directory to work on in the format /tmp/pkgbase-treepkg-random-string. Inside +may change over time). This will be DEPTH=0 and it will create a temporary +directory to work on in the format /tmp/pkgbase-treepkg-random-string. Inside this directory, it will copy the needed PKGBUILDs prefixed with their depth -number. The first package will always be copied to 000\_pkgbase. +number. The first package will always be copied to 000\_pkgbase. From then on, treepkg sources the PKGBUILD and runs itself over all pkgnames on the depends and makedepends array, only if it detects their versions aren't already built or deprecated by newer ones, using the `is_built` utility. -While processing this info, it will increase the depth of the packages. It'll +While processing this info, it will increase the depth of the packages. It'll also write a CSV file with the knowledge it acquires from the ABS tree (useful -for debugging). This file is called BUILDORDER. +for debugging). This file is called BUILDORDER. When this process ends (no more needed dependencies are found), the temporary work dir is traversed in inverse order (from higher depths to 0) running the @@ -87,8 +86,8 @@ Your HOOKLOCALRELEASE script should look like this: > Note the first HOOKLOCALRELEASE argument is the remote repository name (core, > extra, etc.) -There's a special case when a dependency depends on another that was put on -a depth level lower than itself. In this case the build order will be wrongly +There's a special case when a dependency depends on another that was put on a +depth level lower than itself. In this case the build order will be wrongly assumed and you may end up with broken packages. To explain it with an example: @@ -96,35 +95,35 @@ To explain it with an example: ghostscript (0) - fontconfig (1) \ cups (1) - fontconfig (ignored) -The second time fontconfig appears, it will be ignored. In this case cups will +The second time fontconfig appears, it will be ignored. In this case cups will build against an fontconfig version that will be outdated by the fontconfig -version at depth 1. In this cases, `treepkg` will detect it cached the +version at depth 1. In this cases, `treepkg` will detect it cached the dependency on a lower depth, and will "bury" it to a depth higher than the -current one. Thus this will become the build path: +current one. Thus this will become the build path: ghostscript (0) - fontconfig (buried) \ cups (1) - fontconfig (2) -> Note: currently, `treepkg` doesn't perform recursive burying, so if you hit -> a really long build tree with some circular dependencies you may find -> packages buried several times and queued to build before their actuals deps. +> Note: currently, `treepkg` doesn't perform recursive burying, so if you hit a +> really long build tree with some circular dependencies you may find packages +> buried several times and queued to build before their actuals deps. ## Tips -`treepkg` accepts two arguments: 1) the temporary work dir and 2) the next -depth level it should use (if current equals 0, it'll pass 1). You don't need -to pass this arguments when running it manually, they're used internally to +`treepkg` accepts two arguments: 1) the temporary work dir and 2) the next depth +level it should use (if current equals 0, it'll pass 1). You don't need to pass +this arguments when running it manually, they're used internally to automatically construct the build path. But if a build failed, `treepkg` will cancel itself immediately informing you -where the leftovers files were left. If you pass this path to `treepkg` as the +where the leftovers files were left. If you pass this path to `treepkg` as the first argument, it will resume the build, skipping to the last package being packaged. You can take the opportunity given by this to modify the build path or the -PKGBUILDs, without having to run `treepkg` twice. For instance you can remove -a package from the build order, or move it manually, or update the PKGBUILD -that made `treepkg` fail in the first place. You can force a skipped package -(after building it manually) by using `touch built_ok` on the PKGBUILD dir. +PKGBUILDs, without having to run `treepkg` twice. For instance you can remove a +package from the build order, or move it manually, or update the PKGBUILD that +made `treepkg` fail in the first place. You can force a skipped package (after +building it manually) by using `touch built_ok` on the PKGBUILD dir. You don't probably want to mess with the second argument though. |