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authorLars Hjemli <hjemli@gmail.com>2007-05-26 15:56:40 +0200
committerJunio C Hamano <junkio@cox.net>2007-05-26 20:24:07 -0700
commit70c7ac22de681a83621bda03e676348170c8d8a2 (patch)
tree604b5ea434354562c978a5ce479c95af0c147118 /git-submodule.sh
parent99b5a79e1329468bee26ae3bd9070c47418279d0 (diff)
downloadgit-70c7ac22de681a83621bda03e676348170c8d8a2.tar.gz
Add git-submodule command
This command can be used to initialize, update and inspect submodules. It uses a .gitmodules file, readable by git-config, in the top level directory of the 'superproject' to specify a mapping between submodule paths and repository url. Example .gitmodules layout: [module "git"] url = git://git.kernel.org/pub/scm/git/git.git With this entry in .gitmodules (and a commit reference in the index entry for the path "git"), the command 'git submodule init' will clone the repository at kernel.org into the directory "git". Known issues ============ There is currently no way to override the url found in the .gitmodules file, except by manually creating the subproject repository. The place to fix this in the script has a rather long comment about a possible plan. Funny paths will be quoted in the output from git-ls-files, but git-submodule does not attempt to unquote (or even detect the presence of) such paths. Signed-off-by: Lars Hjemli <hjemli@gmail.com> Signed-off-by: Junio C Hamano <junkio@cox.net>
Diffstat (limited to 'git-submodule.sh')
-rwxr-xr-xgit-submodule.sh194
1 files changed, 194 insertions, 0 deletions
diff --git a/git-submodule.sh b/git-submodule.sh
new file mode 100755
index 0000000000..6ed5a6ced2
--- /dev/null
+++ b/git-submodule.sh
@@ -0,0 +1,194 @@
+#!/bin/sh
+#
+# git-submodules.sh: init, update or list git submodules
+#
+# Copyright (c) 2007 Lars Hjemli
+
+USAGE='[--quiet] [--cached] [status|init|update] [--] [<path>...]'
+. git-sh-setup
+require_work_tree
+
+init=
+update=
+status=
+quiet=
+cached=
+
+#
+# print stuff on stdout unless -q was specified
+#
+say()
+{
+ if test -z "$quiet"
+ then
+ echo "$@"
+ fi
+}
+
+#
+# Run clone + checkout on missing submodules
+#
+# $@ = requested paths (default to all)
+#
+modules_init()
+{
+ git ls-files --stage -- "$@" | grep -e '^160000 ' |
+ while read mode sha1 stage path
+ do
+ # Skip submodule paths that already contain a .git directory.
+ # This will also trigger if $path is a symlink to a git
+ # repository
+ test -d "$path"/.git && continue
+
+ # If there already is a directory at the submodule path,
+ # expect it to be empty (since that is the default checkout
+ # action) and try to remove it.
+ # Note: if $path is a symlink to a directory the test will
+ # succeed but the rmdir will fail. We might want to fix this.
+ if test -d "$path"
+ then
+ rmdir "$path" 2>/dev/null ||
+ die "Directory '$path' exist, but is neither empty nor a git repository"
+ fi
+
+ test -e "$path" &&
+ die "A file already exist at path '$path'"
+
+ url=$(GIT_CONFIG=.gitmodules git-config module."$path".url)
+ test -z "$url" &&
+ die "No url found for submodule '$path' in .gitmodules"
+
+ # MAYBE FIXME: this would be the place to check GIT_CONFIG
+ # for a preferred url for this submodule, possibly like this:
+ #
+ # modname=$(GIT_CONFIG=.gitmodules git-config module."$path".name)
+ # alturl=$(git-config module."$modname".url)
+ #
+ # This would let the versioned .gitmodules file use the submodule
+ # path as key, while the unversioned GIT_CONFIG would use the
+ # logical modulename (if present) as key. But this would need
+ # another fallback mechanism if the module wasn't named.
+
+ git-clone -n "$url" "$path" ||
+ die "Clone of submodule '$path' failed"
+
+ (unset GIT_DIR && cd "$path" && git-checkout -q "$sha1") ||
+ die "Checkout of submodule '$path' failed"
+
+ say "Submodule '$path' initialized"
+ done
+}
+
+#
+# Checkout correct revision of each initialized submodule
+#
+# $@ = requested paths (default to all)
+#
+modules_update()
+{
+ git ls-files --stage -- "$@" | grep -e '^160000 ' |
+ while read mode sha1 stage path
+ do
+ if ! test -d "$path"/.git
+ then
+ # Only mention uninitialized submodules when its
+ # path have been specified
+ test "$#" != "0" &&
+ say "Submodule '$path' not initialized"
+ continue;
+ fi
+ subsha1=$(unset GIT_DIR && cd "$path" &&
+ git-rev-parse --verify HEAD) ||
+ die "Unable to find current revision of submodule '$path'"
+
+ if test "$subsha1" != "$sha1"
+ then
+ (unset GIT_DIR && cd "$path" && git-fetch &&
+ git-checkout -q "$sha1") ||
+ die "Unable to checkout '$sha1' in submodule '$path'"
+
+ say "Submodule '$path': checked out '$sha1'"
+ fi
+ done
+}
+
+#
+# List all registered submodules, prefixed with:
+# - submodule not initialized
+# + different revision checked out
+#
+# If --cached was specified the revision in the index will be printed
+# instead of the currently checked out revision.
+#
+# $@ = requested paths (default to all)
+#
+modules_list()
+{
+ git ls-files --stage -- "$@" | grep -e '^160000 ' |
+ while read mode sha1 stage path
+ do
+ if ! test -d "$path"/.git
+ then
+ say "-$sha1 $path"
+ continue;
+ fi
+ revname=$(unset GIT_DIR && cd "$path" && git-describe $sha1)
+ if git diff-files --quiet -- "$path"
+ then
+ say " $sha1 $path ($revname)"
+ else
+ if test -z "$cached"
+ then
+ sha1=$(unset GIT_DIR && cd "$path" && git-rev-parse --verify HEAD)
+ revname=$(unset GIT_DIR && cd "$path" && git-describe $sha1)
+ fi
+ say "+$sha1 $path ($revname)"
+ fi
+ done
+}
+
+while case "$#" in 0) break ;; esac
+do
+ case "$1" in
+ init)
+ init=1
+ ;;
+ update)
+ update=1
+ ;;
+ status)
+ status=1
+ ;;
+ -q|--quiet)
+ quiet=1
+ ;;
+ --cached)
+ cached=1
+ ;;
+ --)
+ break
+ ;;
+ -*)
+ usage
+ ;;
+ *)
+ break
+ ;;
+ esac
+ shift
+done
+
+case "$init,$update,$status,$cached" in
+1,,,)
+ modules_init "$@"
+ ;;
+,1,,)
+ modules_update "$@"
+ ;;
+,,*,*)
+ modules_list "$@"
+ ;;
+*)
+ usage
+ ;;
+esac