Automatic build versioning

1 files changed, 40 insertions, 0 deletions

diff --git a/scripts/gen-version.sh b/scripts/gen-version.sh
new file mode 100755
index 0000000..ffe7f43
--- /dev/null
+++ b/scripts/gen-version.sh
@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+cd "$(dirname "$0")/.."
+
+build_type="${1:-release}"
+out="src/version_gen.h"
+tmp="$(mktemp)"
+
+tag=$(git describe --tags --abbrev=0 2>/dev/null || echo "v0.0.0")
+version="${tag#v}"
+major="${version%%.*}"
+rest="${version#*.}"
+minor="${rest%%.*}"
+patch="${rest#*.}"
+patch="${patch%%-*}"
+
+commit=$(git rev-parse --short HEAD 2>/dev/null || echo "unknown")
+if ! git diff --quiet 2>/dev/null || ! git diff --cached --quiet 2>/dev/null; then
+    commit="${commit}-dirty"
+fi
+
+cat > "$tmp" <<EOF
+#pragma once
+
+#define STEEZ_VERSION_MAJOR $major
+#define STEEZ_VERSION_MINOR $minor
+#define STEEZ_VERSION_PATCH $patch
+#define STEEZ_VERSION_STRING "$version"
+#define STEEZ_GIT_COMMIT "$commit"
+#define STEEZ_BUILD_DATE "$(date +%Y-%m-%d)"
+#define STEEZ_BUILD_TIME "$(date +%H:%M:%S)"
+#define STEEZ_BUILD_TYPE "$build_type"
+EOF
+
+if ! cmp -s "$tmp" "$out" 2>/dev/null; then
+    mv "$tmp" "$out"
+else
+    rm "$tmp"
+fi