Rename git-init-shared(1) to git-init-acl(1)

We have always felt that the name of this program was too close to the
invocation of 'git init --shared' which does something similar. Make it
clear in the name that we're working with POSIX ACLs instead of normal
permission sets as 'git init --shared' does.

1 files changed, 36 insertions, 0 deletions

diff --git a/git-init-acl b/git-init-acl
new file mode 100755
index 0000000..50950b5
--- /dev/null
+++ b/git-init-acl
@@ -0,0 +1,36 @@
+#!/bin/sh
+
+set -e
+
+usage() {
+	printf "usage: git init-acl directory [user...]\n" >&2
+	exit 1
+}
+
+acl_mask() {
+	# Set the ACL mask for the directory. The default mask will be inherited by
+	# new directories and files (where it will correctly be set to rw-)
+	setfacl -m "d:m:rwx,m:rwx" "$1"
+}
+
+add_to_acl() {
+	# Recursively apply all necessary ACL settings as we may be reinitializing
+	# the git repository with additional authorised users.
+	# Take care *not* to recalculate the ACL mask (-n), since rwX translates to
+	# a mask of rwx even on non-directory files.
+	setfacl -Rnm "d:u:$2:rwX,u:$2:rwX" "$1"
+}
+
+test $# -ge 1 || usage
+dir=$1
+shift
+
+mkdir -p "$dir"
+
+acl_mask "$dir"
+
+for user in "$(id -un)" "$@"; do
+	add_to_acl "$dir" "$user"
+done
+
+exec git init --bare "$dir"