feat: add post-create init workflow for placeholder substitution and context sync

.gitea/workflows/init.yml

@@ -0,0 +1,105 @@
+name: Init
+
+# One-shot bootstrap — runs on first push to main, skips if already initialised.
+# Substitutes all __PROJECT_NAME__ / __MODULE_PATH__ placeholders (file contents
+# and directory names), then runs context:sync to generate CLAUDE.md and friends.
+# Deletes itself on completion so it never runs again.
+
+on:
+  push:
+    branches: [main]
+
+jobs:
+  init:
+    name: Bootstrap project from template
+    runs-on: self-hosted
+
+    # One-shot guard: skip entirely if CLAUDE.md already exists
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.GITEA_TOKEN }}
+          fetch-depth: 0
+
+      - name: Check if already initialised
+        id: guard
+        run: |
+          if [ -f CLAUDE.md ]; then
+            echo "skip=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "skip=false" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Derive project variables
+        if: steps.guard.outputs.skip == 'false'
+        id: vars
+        run: |
+          # Repo name from git remote (e.g. macro-research)
+          PROJECT_NAME=$(basename "$(git rev-parse --show-toplevel)")
+          # Module path: gitea hostname + owner + project name
+          GITEA_HOST=$(git remote get-url origin | sed 's|http://||;s|https://||;s|/.*||')
+          OWNER=$(git remote get-url origin | sed 's|.*/\([^/]*\)/[^/]*\.git|\1|')
+          MODULE_PATH="${GITEA_HOST}/${OWNER}/${PROJECT_NAME}"
+          echo "project_name=${PROJECT_NAME}" >> "$GITHUB_OUTPUT"
+          echo "module_path=${MODULE_PATH}"   >> "$GITHUB_OUTPUT"
+          echo "owner=${OWNER}"               >> "$GITHUB_OUTPUT"
+          echo "→ PROJECT_NAME=${PROJECT_NAME}"
+          echo "→ MODULE_PATH=${MODULE_PATH}"
+
+      - name: Substitute placeholders in file contents
+        if: steps.guard.outputs.skip == 'false'
+        env:
+          PROJECT_NAME: ${{ steps.vars.outputs.project_name }}
+          MODULE_PATH:  ${{ steps.vars.outputs.module_path }}
+        run: |
+          set -euo pipefail
+          # Files to substitute (relative paths, including templated dir names)
+          FILES=$(git ls-files | grep -v '^\.gitea/workflows/init\.yml$')
+          for f in $FILES; do
+            if grep -qF '__PROJECT_NAME__\|__MODULE_PATH__' "$f" 2>/dev/null; then
+              sed -i \
+                -e "s|__PROJECT_NAME__|${PROJECT_NAME}|g" \
+                -e "s|__MODULE_PATH__|${MODULE_PATH}|g" \
+                "$f"
+              echo "  substituted: $f"
+            fi
+          done
+
+      - name: Rename templated directories
+        if: steps.guard.outputs.skip == 'false'
+        env:
+          PROJECT_NAME: ${{ steps.vars.outputs.project_name }}
+        run: |
+          set -euo pipefail
+          # Rename cmd/__PROJECT_NAME__ → cmd/$PROJECT_NAME
+          if [ -d "cmd/__PROJECT_NAME__" ]; then
+            git mv "cmd/__PROJECT_NAME__" "cmd/${PROJECT_NAME}"
+            echo "  renamed: cmd/__PROJECT_NAME__ → cmd/${PROJECT_NAME}"
+          fi
+
+      - name: Install toolchain for context:sync
+        if: steps.guard.outputs.skip == 'false'
+        run: |
+          which task || go install github.com/go-task/task/v3/cmd/task@latest
+
+      - name: Run context:sync
+        if: steps.guard.outputs.skip == 'false'
+        run: task context:sync
+
+      - name: Remove this init workflow
+        if: steps.guard.outputs.skip == 'false'
+        run: |
+          git rm .gitea/workflows/init.yml
+          echo "  removed: .gitea/workflows/init.yml"
+
+      - name: Commit and push
+        if: steps.guard.outputs.skip == 'false'
+        env:
+          PROJECT_NAME: ${{ steps.vars.outputs.project_name }}
+        run: |
+          git config user.name  "gitea-actions[bot]"
+          git config user.email "gitea-actions[bot]@noreply.local"
+          git add -A
+          git commit -m "chore: bootstrap ${PROJECT_NAME} from template"
+          git push origin main
+          echo "✓ project initialised"