SM-26 synthesizer: initial implementation

tools/gen_buildinfo.sh

@@ -0,0 +1,41 @@
+#!/bin/sh
+set -u
+
+SRC_DIR="$1"
+OUT_FILE="$2"
+
+git_ver="unknown"
+git_branch="unknown"
+
+if command -v git >/dev/null 2>&1 && [ -d "$SRC_DIR/.git" ]; then
+    ver=$(git -C "$SRC_DIR" describe --always --dirty --tags 2>/dev/null | tr -d '\n\r')
+    if [ $? -eq 0 ] && [ -n "$ver" ]; then
+        git_ver="$ver"
+    fi
+
+    branch=$(git -C "$SRC_DIR" symbolic-ref --short -q HEAD 2>/dev/null | tr -d '\n\r')
+    if [ -z "$branch" ]; then
+        branch="detached"
+    fi
+    git_branch="$branch"
+fi
+
+build_time=$(date '+%Y-%m-%d %H:%M:%S %Z' 2>/dev/null || date '+%Y-%m-%d %H:%M:%S')
+
+mkdir -p "$(dirname "$OUT_FILE")"
+TMP="$OUT_FILE.tmp.$$"
+
+cat > "$TMP" <<EOF
+#pragma once
+static constexpr const char* const SM26_GIT_VERSION = "$git_ver";
+static constexpr const char* const SM26_GIT_BRANCH  = "$git_branch";
+static constexpr const char* const SM26_BUILD_TIME  = "$build_time";
+EOF
+
+if [ ! -f "$OUT_FILE" ] || ! cmp -s "$TMP" "$OUT_FILE"; then
+    mv "$TMP" "$OUT_FILE"
+else
+    rm -f "$TMP"
+fi
+
+echo "buildinfo: v$git_ver ($git_branch) @ $build_time"