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231b63163a36a71179431da9cbed445f8225caf5
[code/myrepos.git] / lib / git-fake-bare
1 # An example of how to add a new revision control system type to mr.
2 # git fake bare repositories have a detached workspace. One potential
3 # application is storing dotfiles in git, keeping them checked out in
4 # one $HOME, but checked into different git repositories. This file adds
5 # support for them, separate from the normal git support.
6
7 # To make mr use this file, add a line like this inside the [DEFAULT]
8 # section of your ~/.mrconfig
9 #include = cat /usr/share/mr/git-fake-bare
10
11 # And an example repo using it would look something like:
12 #[.dotfiles]
13 #lib = git_fake_bare_worktree $HOME
14 #checkout = git_fake_bare_checkout git://... .dotfiles
15
16 lib =
17         # called to tell git where the worktree is
18         git_fake_bare_worktree() {
19                 GIT_WORK_TREE="$1"; export GIT_WORK_TREE
20         }
21         # git doesn't have an easy way to check out such a repo, so
22         # do it by hand
23         git_fake_bare_checkout() {
24                 url="$1"
25                 repo="$2"
26                 GIT_WORK_TREE= git clone --no-checkout "$url" "$repo"
27                 cd "$repo"
28                 mkdir -p "$GIT_WORK_TREE"
29                 git read-tree HEAD
30                 git config core.worktree "$GIT_WORK_TREE"
31                 git checkout-index -a --prefix="$worktree" || true
32                 mv .git/* .
33                 rmdir .git
34         }
35
36 git_fake_bare_test = 
37         test -d "$MR_REPO"/refs/heads && test -d "$MR_REPO"/refs/tags &&
38         test -d "$MR_REPO"/objects && test -f "$MR_REPO"/config &&
39         test "$(GIT_CONFIG="$MR_REPO"/config git-config --get core.bare)" = false
40
41 git_fake_bare_update =
42         # all this is because of a bug in git-fetch, which requires GIT_DIR set
43         local git_dir_override; git_dir_override=.git
44         case "$(get_git_repo_type "$MR_REPO")" in
45                 fake-bare) git_dir_override="$MR_REPO";;
46         esac
47         args="$@"
48         [ -z "$args" ] && args="-t origin master"
49         eval GIT_DIR="$git_dir_override" git pull "$args"
50
51 git_fake_bare_status = git status "$@" || true
52
53 git_fake_bare_commit = error "commit does not work for fake bare git repositories (yet)."
54
55 git_fake_bare_diff = error "diff does not work for fake bare git repositories (yet)."
56
57 git_fake_bare_log = git log "$@"
58
59 git_fake_bare_register = 
60         url="$(LANG=C GIT_CONFIG=config git-config --get remote.origin.url)" || true
61         if [ -z "$url" ]; then
62                 error "cannot determine git url"
63         fi
64         worktree="$(git-config --get core.worktree)" || true
65         if [ -z "$worktree" ]; then
66                 error "git worktree is not set"
67         fi
68         worktree="${worktree%%/}/"
69         if [ ! -d "$worktree" ]; then
70                 error "git worktree $worktree does not exist"
71         fi
72         mr -c "$MR_CONFIG" config "`pwd`" lib="git_fake_bare_worktree '$worktree'"
73         echo "Registering git url: $url in $MR_CONFIG (with worktree $worktree)"
74         mr -c "$MR_CONFIG" config "`pwd`" checkout="git_fake_bare_checkout '$url' '$MR_REPO'"