1 files changed, 32 insertions, 0 deletions
diff --git a/tools/find-build-dir.sh b/tools/find-build-dir.sh
new file mode 100755
index 0000000..fb8a1c1
--- /dev/null
+++ b/tools/find-build-dir.sh
@@ -0,0 +1,32 @@
+#!/bin/sh
+set -e
+
+# Try to guess the build directory:
+# we look for subdirectories of the parent directory that look like ninja build dirs.
+
+if [ -n "$BUILD_DIR" ]; then
+    echo "$(realpath "$BUILD_DIR")"
+    exit 0
+fi
+
+root="$(dirname "$(realpath "$0")")"
+
+found=
+for i in "$root"/../*/build.ninja; do
+    c="$(dirname $i)"
+    [ -d "$c" ] || continue
+    [ "$(basename "$c")" != mkosi.builddir ] || continue
+
+    if [ -n "$found" ]; then
+        echo 'Found multiple candidates, specify build directory with $BUILD_DIR' >&2
+        exit 2
+    fi
+    found="$c"
+done
+
+if [ -z "$found" ]; then
+    echo 'Specify build directory with $BUILD_DIR' >&2
+    exit 1
+fi
+
+echo "$(realpath $found)"