Handle external commands directly rather than via renamed symlinks

[bup.git] / lib / cmd / bup-import-rdiff-backup

diff --git a/lib/cmd/bup-import-rdiff-backup b/lib/cmd/bup-import-rdiff-backup
new file mode 100755 (executable)
index 0000000..0bbf327
--- /dev/null
+++ b/lib/cmd/bup-import-rdiff-backup
@@ -0,0 +1,80 @@
+#!/usr/bin/env bash
+
+cmd_dir="$(cd "$(dirname "$0")" && pwd)" || exit $?
+
+set -o pipefail
+
+must() {
+    local file=${BASH_SOURCE[0]}
+    local line=${BASH_LINENO[0]}
+    "$@"
+    local rc=$?
+    if test $rc -ne 0; then
+        echo "Failed at line $line in $file" 1>&2
+        exit $rc
+    fi
+}
+
+usage() {
+    echo "Usage: bup import-rdiff-backup [-n]" \
+        "<path to rdiff-backup root> <backup name>"
+    echo "-n,--dry-run: just print what would be done"
+    exit 1
+}
+
+control_c() {
+    echo "bup import-rdiff-backup: signal 2 received" 1>&2
+    exit 128
+}
+
+must trap control_c INT
+
+dry_run=
+while [ "$1" = "-n" -o "$1" = "--dry-run" ]; do
+    dry_run=echo
+    shift
+done
+
+bup()
+{
+    $dry_run "$cmd_dir/bup" "$@"
+}
+
+snapshot_root="$1"
+branch="$2"
+
+[ -n "$snapshot_root" -a "$#" = 2 ] || usage
+
+if [ ! -e "$snapshot_root/." ]; then
+    echo "'$snapshot_root' isn't a directory!"
+    exit 1
+fi
+
+
+backups=$(must rdiff-backup --list-increments --parsable-output "$snapshot_root") \
+    || exit $?
+backups_count=$(echo "$backups" | must wc -l) || exit $?
+counter=1
+echo "$backups" |
+while read timestamp type; do
+    tmpdir=$(must mktemp -d import-rdiff-backup-XXXXXXX) || exit $?
+
+    echo "Importing backup from $(date -d @$timestamp +%c) " \
+        "($counter / $backups_count)" 1>&2
+    echo 1>&2
+
+    echo "Restoring from rdiff-backup..." 1>&2
+    must rdiff-backup -r $timestamp "$snapshot_root" "$tmpdir"
+    echo 1>&2
+
+    echo "Importing into bup..." 1>&2
+    tmpidx=$(must mktemp -u import-rdiff-backup-idx-XXXXXXX) || exit $?
+    must bup index -ux -f "$tmpidx" "$tmpdir"
+    must bup save --strip --date="$timestamp" -f "$tmpidx" -n "$branch" "$tmpdir"
+    must rm -f "$tmpidx"
+
+    must rm -rf "$tmpdir"
+    counter=$((counter+1))
+    echo 1>&2
+    echo 1>&2
+done