snaprep

commit 3292774151bb3be7d89c00bde648c924323accbf
parent 1543c425e5abb5ab7de4eab8aa992f78827b7c2e
Author: Jan Pobrislo <ccx@webprojekty.cz>
Date:   Tue, 12 Aug 2014 19:06:09 +0200

add snap.marked for plain directory snapshotting
Diffstat:
A
bin/snap.marked
 | 
32
++++++++++++++++++++++++++++++++
M
bin/snap.push
 | 
2
+-

2 files changed, 33 insertions(+), 1 deletion(-)
diff --git a/bin/snap.marked b/bin/snap.marked
@@ -0,0 +1,32 @@
+#!/bin/sh
+
+usage() {
+	printf >&2 "Usage: %s: snapshot_dir program\n" $(basename "$0")
+	printf >&2 "Mark directory with a timestamp and run program"
+	printf >&2 "remove mark when program exits"
+	exit 2
+}
+
+die() {
+	printf "%s\n" "$*"
+	exit 1
+}
+
+test $# -gt 1 || usage
+SNAP_SRC="$1"
+export SNAP_SRC
+shift
+test -d "$SNAP_SRC" || die "not a directory: $SNAP_SRC"
+LOCKFILE="$SNAP_SRC/.snaprep"
+touch "$LOCKFILE" || exit $?
+flock -n 0 <"$LOCKFILE" || exit $?
+echo $$ >"$LOCKFILE" || exit $?
+rm -f "$SNAP_SRC"/.snapshot.[0-9]* 2>/dev/null
+mark="$SNAP_SRC/.snapshot.$(date +%s)"
+touch "$mark" || exit $?
+
+"$@"
+
+RETCODE=$?
+rm -f "$mark" "$LOCKFILE"
+exit $RETCODE
diff --git a/bin/snap.push b/bin/snap.push
@@ -7,7 +7,7 @@ usage() {
 }
 
 die() {
-	printf "%s" "$*"
+	printf "%s\n" "$*"
 	exit 1
 }