winedll/tools/diff-wine.sh

#!/bin/bash
# Diff msvcrt source and include files against the original Wine tree.
#
# Usage:
#   ./tools/diff-wine.sh [WINE_DIR]
#
# Defaults to ~/Development/wine if WINE_DIR is not provided.
# Pass --stat for a summary-only view, or --name-only for just filenames.

set -euo pipefail

REPO_DIR="$(cd "$(dirname "$0")/.." && pwd)"
WINE_DIR="${1:-$HOME/Development/wine}"
shift 2>/dev/null || true
DIFF_ARGS="${*:---unified=5 --color=auto}"

if [ ! -d "$WINE_DIR" ]; then
    echo "Error: Wine directory not found at $WINE_DIR" >&2
    exit 1
fi

found=0
missing_wine=0
missing_repo=0

diff_tree() {
    local repo_subdir="$1"
    local wine_subdir="$2"
    local label="$3"

    local repo_path="$REPO_DIR/$repo_subdir"
    local wine_path="$WINE_DIR/$wine_subdir"

    if [ ! -d "$wine_path" ]; then
        echo "# WARNING: Wine path not found: $wine_path" >&2
        return
    fi

    echo "############################################################"
    echo "# $label"
    echo "# repo: $repo_subdir"
    echo "# wine: $wine_subdir"
    echo "############################################################"
    echo

    # Files present in both trees
    if [ -d "$repo_path" ]; then
        while IFS= read -r -d '' rel; do
            local wine_file="$wine_path/$rel"
            local repo_file="$repo_path/$rel"
            if [ -f "$wine_file" ]; then
                if ! diff -q "$wine_file" "$repo_file" >/dev/null 2>&1; then
                    echo "=== MODIFIED: $rel ==="
                    colordiff $DIFF_ARGS "$wine_file" "$repo_file" || true
                    echo
                    ((found++)) || true
                fi
            else
                echo "=== REPO-ONLY (not in Wine): $rel ==="
                ((missing_wine++)) || true
            fi
        done < <(find "$repo_path" -type f \( -name '*.c' -o -name '*.h' -o -name '*.spec' \) -printf '%P\0' | sort -z)
    fi

    # Files in Wine but missing from repo
    if [ -d "$repo_path" ]; then
        while IFS= read -r -d '' rel; do
            local repo_file="$repo_path/$rel"
            if [ ! -f "$repo_file" ]; then
                echo "=== WINE-ONLY (not in repo): $rel ==="
                ((missing_repo++)) || true
            fi
        done < <(find "$wine_path" -type f \( -name '*.c' -o -name '*.h' -o -name '*.spec' \) -printf '%P\0' | sort -z)
    fi
}

# Include headers: include/msvcrt/
diff_tree "include/msvcrt" "include/msvcrt" "msvcrt public headers (include/msvcrt/)"

# msvcrt dll source
diff_tree "dlls/msvcrt" "dlls/msvcrt" "msvcrt dll source (dlls/msvcrt/)"

# Versioned CRT dlls that exist in both trees
for dll in "$REPO_DIR"/dlls/msvcr* "$REPO_DIR"/dlls/ucrtbase; do
    name="$(basename "$dll")"
    if [ -d "$WINE_DIR/dlls/$name" ]; then
        diff_tree "dlls/$name" "dlls/$name" "$name dll source (dlls/$name/)"
    fi
done

echo "############################################################"
echo "# Summary"
echo "#   Modified files: $found"
echo "#   Repo-only files: $missing_wine"
echo "#   Wine-only files: $missing_repo"
echo "############################################################"