1 files changed, 71 insertions, 0 deletions
diff --git a/cgit-chroot b/cgit-chroot
new file mode 100755
index 0000000..1828ee5
--- /dev/null
+++ b/cgit-chroot
@@ -0,0 +1,71 @@
+#!/bin/sh
+
+set -e
+
+CGIT_CHROOT=${CGIT_CHROOT:-/srv/cgit}
+CGIT_GIT_ROOT=${CGIT_GIT_ROOT:-/srv/git}
+
+log() {
+	printf ' %s %s\n' "$1" "$2"
+}
+
+ladd() {
+	log + "$1"
+}
+
+ldel() {
+	log - "$1"
+}
+
+remove_prefix() {
+	printf "%s" "${1#$CGIT_CHROOT/*}"
+}
+
+bind_mount() {
+	mkdir "$2"
+	mount --rbind "$1" "$2"
+	mount --make-rslave "$2"
+	ladd "$(remove_prefix "$2")"
+}
+
+bind_umount() {
+	umount "$i"
+	rmdir "$i"
+	ldel "$(remove_prefix "$i")"
+}
+
+setup() {
+	mkdir "$CGIT_CHROOT"/dev
+	mknod "$CGIT_CHROOT"/dev/null c 1 3
+	chmod 666 "$CGIT_CHROOT"/dev/null
+
+	for i in "$CGIT_CHROOT"/instances/*; do
+		test -d "$i" || continue
+		user=$(basename "$i")
+		id -ru "$user" >/dev/null || continue
+
+		git_repo_dir="${CGIT_GIT_ROOT}/$user"
+		test -d "$git_repo_dir" || continue
+
+		instance_repo_dir="$CGIT_CHROOT"/instances/$user/repos
+
+		bind_mount "$git_repo_dir" "$instance_repo_dir"
+		chmod 0701 "$instance_repo_dir"
+	done
+}
+
+teardown() {
+	rm "$CGIT_CHROOT"/dev/null
+	rmdir "$CGIT_CHROOT"/dev
+
+	for i in "$CGIT_CHROOT"/instances/*/repos; do
+		bind_umount "$i"
+	done
+}
+
+test $# -eq 1 || exit 1
+
+case $1 in
+	setup) setup;;
+	teardown) teardown;;
+esac