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-rwxr-xr-xsubmodules.sh181
1 files changed, 181 insertions, 0 deletions
diff --git a/submodules.sh b/submodules.sh
new file mode 100755
index 0000000..1d7b13f
--- /dev/null
+++ b/submodules.sh
@@ -0,0 +1,181 @@
+#!/bin/sh
+#
+# submodules.sh: init, update or list git submodules
+#
+# Copyright (C) 2006 Lars Hjemli
+#
+# Licensed under GNU General Public License v2
+# (see COPYING for full license text)
+#
+
+
+usage="submodules.sh [-i | -u] [-q] [--cached] [path...]"
+init=
+update=
+quiet=
+cached=
+
+
+say()
+{
+ if test -z "$quiet"
+ then
+ echo -e "$@"
+ fi
+}
+
+
+die()
+{
+ echo >&2 -e "$@"
+ exit 1
+}
+
+
+
+#
+# Silently checkout specified submodule revision, return exit status of git-checkout
+#
+# $1 = local path
+# $2 = requested sha1
+#
+module_checkout()
+{
+ $(cd "$1" && git checkout "$2" 1>/dev/null 2>/dev/null)
+}
+
+
+#
+# Find all (requested) submodules, run clone + checkout on missing paths
+#
+# $@ = requested paths (default to all)
+#
+modules_init()
+{
+ git ls-files --stage -- $@ | grep -e '^160000 ' |
+ while read mode sha1 stage path
+ do
+ test -d "$path/.git" && continue
+
+ if test -d "$path"
+ then
+ rmdir "$path" 2>/dev/null ||
+ die "Directory '$path' exist, but not as a submodule"
+ fi
+
+ test -e "$path" && die "A file already exist at path '$path'"
+
+ url=$(sed -nre "s/^$path[ \t]+//p" .gitmodules)
+ test -z "$url" && die "No url found for $path in .gitmodules"
+
+ git clone "$url" "$path" || die "Clone of submodule '$path' failed"
+ module_checkout "$path" "$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
+ say "Submodule '$path' not initialized"
+ continue;
+ fi
+ subsha1=$(cd "$path" && git rev-parse --verify HEAD) ||
+ die "Unable to find current revision of submodule '$path'"
+ if test "$subsha1" != "$sha1"
+ then
+ module_checkout "$path" "$sha1" ||
+ die "Unable to checkout revision $sha1 of submodule '$path'"
+ say "Submodule '$path' reset to revision $sha1"
+ fi
+ done
+}
+
+#
+# List all registered submodules, prefixed with:
+# - submodule not initialized
+# + different version 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 $path"
+ continue;
+ fi
+ revname=$(cd "$path" && git describe $sha1)
+ if git diff-files --quiet -- "$path"
+ then
+ say " $sha1 $path\t($revname)"
+ else
+ if test -z "$cached"
+ then
+ sha1=$(cd "$path" && git rev-parse HEAD)
+ revname=$(cd "$path" && git describe HEAD)
+ fi
+ say "+$sha1 $path\t($revname)"
+ fi
+ done
+}
+
+
+while case "$#" in 0) break ;; esac
+do
+ case "$1" in
+ -i)
+ init=1
+ ;;
+ -u)
+ update=1
+ ;;
+ -q)
+ quiet=1
+ ;;
+ --cached)
+ cached=1
+ ;;
+ --)
+ break
+ ;;
+ -*)
+ echo "Usage: $usage"
+ exit 1
+ ;;
+ --*)
+ echo "Usage: $usage"
+ exit 1
+ ;;
+ *)
+ break
+ ;;
+ esac
+ shift
+done
+
+
+if test "$init" = "1"
+then
+ modules_init $@
+elif test "$update" = "1"
+then
+ modules_update $@
+else
+ modules_list $@
+fi