update_commit_id.sh

#!/bin/bash
# ============================================================================
# update_commit_id.sh - Generate version identifier from git repository
# ============================================================================
# This script generates commit_id.inc with CURRENT_GAMECORE_VERSION
# Used to identify DLL version in crash dumps and debugging
# Linux/Mac equivalent of update_commit_id.bat
# ============================================================================

set -e

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
OUTPUT_FILE="${SCRIPT_DIR}/commit_id.inc"

# Check if git is available
if ! command -v git &> /dev/null; then
    echo "ERROR: git command not found. Cannot generate version identifier."
    echo 'const char CURRENT_GAMECORE_VERSION[] = "Unknown - Git Not Found"; //autogenerated' > "$OUTPUT_FILE"
    exit 1
fi

# Check working tree status
STATUS="Clean"
if [ -n "$(git status --untracked-files=no --porcelain 2>/dev/null)" ]; then
    STATUS="Dirty"
    echo "Uncommitted changes detected:"
    git status --untracked-files=no --porcelain
fi

if [ "$STATUS" == "Clean" ]; then
    echo "Nothing to commit, working tree clean."
fi

# Get current commit hash (always available)
HEADCOMMIT=$(git rev-list --abbrev-commit -n 1 HEAD 2>/dev/null)

if [ -z "$HEADCOMMIT" ]; then
    echo "ERROR: Could not determine HEAD commit. Not in a git repository?"
    echo 'const char CURRENT_GAMECORE_VERSION[] = "Unknown - Not Git Repo"; //autogenerated' > "$OUTPUT_FILE"
    exit 1
fi

# Try to get tag information using git describe
DESCRIBE_OUTPUT=$(git describe --tags HEAD 2>/dev/null || true)

if [ -z "$DESCRIBE_OUTPUT" ]; then
    # No tags found at all - use commit hash only
    echo "WARNING: No git tags found. Using commit hash only."
    echo "const char CURRENT_GAMECORE_VERSION[] = \"No-Tag $HEADCOMMIT $STATUS\"; //autogenerated, do not commit this file!" > "$OUTPUT_FILE"
    echo "Version identifier will be \"No-Tag $HEADCOMMIT $STATUS\""
    exit 0
fi

echo "Git describe output: $DESCRIBE_OUTPUT"

# Use git describe output directly - it contains all needed info
# Formats:
#   "Release-5.1"                  (exactly on tag)
#   "Release-5.1-3-gadd24e8ef"     (3 commits after tag, at commit add24e8ef)

echo "const char CURRENT_GAMECORE_VERSION[] = \"$DESCRIBE_OUTPUT $STATUS\"; //autogenerated, do not commit this file!" > "$OUTPUT_FILE"
echo "Version identifier will be \"$DESCRIBE_OUTPUT $STATUS\""

echo "Generated $OUTPUT_FILE successfully."