fix: embed version at release time for correct --version output

Previously --version used git describe at runtime, which only works
inside a git repo. When installed via Homebrew, it showed only the SHA.

Now the version is embedded during CI release, and the script falls
back to git describe for local development.

Also fixed upgrade message to show brew instead of npm.

Co-Authored-By: Claude Code (User Settings, in: ${CLAUDE_PROJECT_DIR}) <noreply@anthropic.com>

Author: nsheaps

.github/workflows/release.yaml

@@ -53,6 +53,11 @@ jobs:
             echo "released=false" >> "$GITHUB_OUTPUT"
           fi
 
+      - name: Embed version in script
+        if: steps.release.outputs.released == 'true'
+        run: |
+          sed -i 's/__VERSION__/${{ steps.release.outputs.tag }}/' bin/git-wt
+
       - name: Create GitHub release
         if: steps.release.outputs.released == 'true'
         run: |

bin/git-wt

@@ -19,6 +19,18 @@
 
 set -euo pipefail
 
+# Version is replaced at release time by CI. For local dev, falls back to git describe.
+GIT_WT_VERSION="__VERSION__"
+
+# Get version: use embedded version if set, otherwise fall back to git describe for local dev
+get_version() {
+  if [[ "$GIT_WT_VERSION" != __"VERSION"__ ]]; then
+    echo "$GIT_WT_VERSION"
+  else
+    git describe --tags --always 2>/dev/null || echo 'dev'
+  fi
+}
+
 SCAN_DIR="${HOME}/src"
 TARGET_BRANCH=""
 UPDATE_CHECK_FILE="/tmp/git-wt-update-check-$$"
@@ -52,7 +64,7 @@ check_for_updates() {
 }
 
 # Start background update check
-CURRENT_VERSION=$(git describe --tags --always 2>/dev/null || echo 'dev')
+CURRENT_VERSION=$(get_version)
 check_for_updates "$CURRENT_VERSION" &
 UPDATE_CHECK_PID=$!
 
@@ -71,7 +83,7 @@ show_update_notification() {
       local new_version="${update_info#UPDATE_AVAILABLE=}"
       echo ""
       gum style --foreground 214 "A new release of git-wt is available: ${CURRENT_VERSION#v} → $new_version"
-      echo "To upgrade, run: npm update -g git-wt"
+      echo "To upgrade, run: brew upgrade git-wt"
     fi
   fi
 }
@@ -86,7 +98,7 @@ while [[ $# -gt 0 ]]; do
   case "$1" in
     --scan-dir) SCAN_DIR="$2"; shift 2 ;;
     -h|--help) show_help ;;
-    -v|--version) echo "git-wt $(git describe --tags --always 2>/dev/null || echo 'dev')"; exit 0 ;;
+    -v|--version) echo "git-wt $(get_version)"; exit 0 ;;
     -*) echo "Unknown option: $1" >&2; show_help ;;
     *) TARGET_BRANCH="$1"; shift ;;
   esac