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Diffstat (limited to 'git-submodule.sh')
| -rwxr-xr-x | git-submodule.sh | 194 |
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 |