Git for Plan 9: git/fs ====================== All commits in this repository were made with git9 running on 9front. About ----- Plan 9 is a non-posix system. Upstream git has been ported, but feels distinctly un-plan9ish, and even in its native environment, has been justifiably tarred and feathered for its user experience. Git/fs implements a git client for plan 9. The intent is to support working with git repositories, without cloning the git interface directly. Git/fs is usable, but not battle tested. It works for me, and covers the features I need on a daily basis. Structure --------- The git/fs program provides a file system mounted on /mnt/git. It provides a read-only view into the repository contents to allow scripts to inspect the data. Surrounding scripts and binaries will manipulate the repository contents directly. These changes will be immediately mirrored in the file system. Scripts will generally mount git/fs as needed to do their work, but if you want to browse the repository manually, run it yourself. You'll get `/mnt/git` mounted, with the following contents: /mnt/git/object: The objects in the repo. /mnt/git/branch: The branches in the repo. /mnt/git/ctl: A file showing the status of the repo. Currently, it only shows the current branch. /mnt/git/HEAD An alias for the currently checked out commit directory. Visible Differences ------------------- The most obvious difference is that Git's index is a bit boneheaded, so I'm ignoring it. The index doesn't affect the wire protocol, so this isn't an interoperability issue, unless you share the same physical repository on both Plan 9 and Unix. If you do, expect them to disagree about the files that have been modified in the working copy. In fact, the entire concept of the staging area has been dropped, as it's both confusing and clunky. There are now only three states that files can be in: 'untracked', 'dirty', and 'committed'. Tracking is done with empty files under .git/index9/{removed,tracked}/path/to/file. It's implemented in Plan 9 flavor C, and provides tools for writing repository contents, and a file system for read-only access, which will mirror the current state of the repository. Installation ------------ Install with `mk install`. Examples -------- Some usage examples: git/clone git://git.eigenstate.org/ori/mc.git git/log cd subdir/name git/add foo.c diff bar.c /mnt/git/HEAD/ git/commit git/push Commits are presented as directories with the following contents: author: A file containing the author name hash: A file containing the commit hash parent: A file containing the commit parents, one per line. msg: A file containing the log message for that commit tree: A directory containing a view of the repository. So, for example: % ls /mnt/git/branch/heads/master /mnt/git/branch/heads/master/author /mnt/git/branch/heads/master/hash /mnt/git/branch/heads/master/msg /mnt/git/branch/heads/master/parent /mnt/git/branch/heads/master/tree % cat /mnt/git/branch/heads/master/hash 7d539a7c08aba3f31b3913e0efef11c43ea9 # This is the same commit, with the same contents. % ls /mnt/git/object/7d539a7c08aba3f31b3913e0efef11c43ea9f9ef /mnt/git/object/7d539a7c08aba3f31b3913e0efef11c43ea9f9ef/author /mnt/git/object/7d539a7c08aba3f31b3913e0efef11c43ea9f9ef/hash /mnt/git/object/7d539a7c08aba3f31b3913e0efef11c43ea9f9ef/msg /mnt/git/object/7d539a7c08aba3f31b3913e0efef11c43ea9f9ef/parent /mnt/git/object/7d539a7c08aba3f31b3913e0efef11c43ea9f9ef/tree # what git/diff will hopefully do more concisely soon, filtering # out the non-git files. ape/diff -ur /mnt/git/branch/heads/master/tree . Only in .: .git Only in .: debug diff -ur /mnt/git/branch/heads/master/tree/fold.myr ./fold.myr --- /mnt/git/branch/heads/master/tree/fold.myr Wed Dec 31 16:00:00 1969 +++ ./fold.myr Mon Apr 1 21:39:06 2019 @@ -6,6 +6,8 @@ const foldexpr : (e : expr# -> std.option(constval)) ;; +/* Look, diffing files just works, and I don't need any fancy glue! */ + const foldexpr = {e match e | &(`Eident &[.sc=`Sclassenum, .name=name, .ty=`Tyenum &(`Body enum)]): Only in .: refs The following utilities and binaries are provided: fs: The git filesystem. fetch: The protocol bits for getting data from a git server. send: The protocol bits for sending data to a git server. save: The gnarly bits for storing the files for a commit. conf: A program to extract information from a config file. clone: Clones a repository. commit: Commits a snapshot of the working directory. log: Prints the contents of a commmit log. add: Tells the repository to add a file to the next commit. walk: `du`, but for git status. Supported protocols: git:// and git+ssh://. If someone implements others, I'll gladly accept patches. TODOs ----- Documentation is sparse.