1 files changed, 38 insertions, 0 deletions

diff --git a/src/xorriso-layer.sh b/src/xorriso-layer.sh
new file mode 100755
index 0000000..7ce4776
--- /dev/null
+++ b/src/xorriso-layer.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+
+outdev=debian-live-8.4.0-amd64-standard.btrfs.layered.iso
+indev=debian-live-8.4.0-amd64-standard.btrfs.iso
+volid=SamizdatLive
+btrfs_layer_iso_path=live/layer%s.btrfs
+btrfs_layer_filesystem="$1"
+
+die() { printf '%s\n' "$*"; exit 1; }
+
+[ -f "$btrfs_layer_filesystem" ] || die "Usage: $0 <layer.btrfs> [layer2.btrfs ...]"
+
+i=0
+while [ $i -lt $# ]; do
+    arg=$1
+    [ $i -eq 0 ] && n='' || n=$((i + 1))
+    arg=$(printf "${btrfs_layer_iso_path}=%s" "$n" "$arg")
+    shift
+    set -- "$@" "$arg"
+    i=$((i + 1))
+done
+
+for arg; do echo "a=$arg"; done; exit;
+
+set -ex
+
+cp --reflink "$indev" "$outdev"~
+time xorriso \
+        -drive_class clear_list all \
+        -outdev "$outdev"~ -indev "$outdev"~ \
+        -report_about mishap \
+        -volid "$volid" \
+        -return_with sorry 0 \
+        -pathspecs on -overwrite on \
+        -add_plainly any \
+        "$@"
+
+mv -f "$outdev"~ "$outdev"