import s6-rc-compile wrapper

Signed-off-by: Robert Günzler <r@gnzler.io>

1 files changed, 30 insertions, 0 deletions

diff --git a/bin/svtree-compile b/bin/svtree-compile
new file mode 100755
index 0000000..3e8e63c
--- /dev/null
+++ b/bin/svtree-compile
@@ -0,0 +1,30 @@
+#!/bin/sh
+set -eu
+
+LIVE_DIR=${LIVE_DIR:-/run/s6-rc}
+STATE_DIR=${STATE_DIR:-/etc/s6-rc}
+SOURCE_DIR=${SOURCE_DIR:-/etc/s6-rc/src}
+
+new_dir="$STATE_DIR"/"_$(date +%s)"
+
+main() {
+        local old
+        old="$(find "$STATE_DIR" -maxdepth 1 -name '_[0-9]*' -print)"
+
+        # compile new db
+        s6-rc-compile "$new_dir" "$SOURCE_DIR"
+
+        # switch to new db (if there's an active tree)
+        test -e "$LIVE_DIR" && s6-rc-update -v2 -l "$LIVE_DIR" -b "$new_dir"
+
+        # swap current db
+        s6-ln -snf "$new_dir" "$STATE_DIR"/compiled
+
+        # cleanup old db
+        # NOTE: needs to be unquoted for expansion to work
+        rm -rf -- $old
+}
+
+command -v s6-ln >/dev/null 2>&1 || exit 1
+
+main || rm -rf "$new_dir"