make lint job reusable

.github/workflows/build.yml

@@ -100,27 +100,10 @@ jobs:
     secrets: inherit
 
   lint:
-    runs-on: ubuntu-latest
+    uses: ./.github/workflows/lint.yml
-    steps:
-    - name: Install Lua
-      run: |
-        sudo apt-get update
-        sudo apt-get install lua5.3
-    - name: Clone DFHack
-      uses: actions/checkout@v3
     with:
-        submodules: true
+      dfhack_ref: ${{ github.ref }}
-    - name: Check whitespace
+    secrets: inherit
-      run: python ci/lint.py --git-only --github-actions
-    - name: Check Authors.rst
-      if: always()
-      run: python ci/authors-rst.py
-    - name: Check for missing documentation
-      if: always()
-      run: python ci/script-docs.py
-    - name: Check Lua syntax
-      if: always()
-      run: python ci/script-syntax.py --ext=lua --cmd="luac5.3 -p" --github-actions
 
   check-pr:
     runs-on: ubuntu-latest

.github/workflows/lint.yml

@@ -0,0 +1,45 @@
+name: Lint
+
+on:
+  workflow_call:
+    inputs:
+      dfhack_ref:
+        type: string
+        required: true
+      scripts_ref:
+        type: string
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Install Lua
+      run: |
+        sudo apt-get update
+        sudo apt-get install lua5.3
+    - name: Clone DFHack
+      uses: actions/checkout@v3
+      with:
+        repository: 'DFHack/dfhack'
+        ref: ${{ inputs.dfhack_ref }}
+    - name: Get scripts submodule ref
+      if: '!inputs.scripts_ref'
+      id: scriptssubmoduleref
+      run: echo ref=$(git submodule | fgrep scripts | cut -c2-41) >> $GITHUB_OUTPUT
+    - name: Clone scripts
+      uses: actions/checkout@v3
+      with:
+        repository: 'DFHack/scripts'
+        ref: ${{ inputs.scripts_ref || steps.scriptssubmoduleref.outputs.ref }}
+        path: scripts
+    - name: Check whitespace
+      run: python ci/lint.py --git-only --github-actions
+    - name: Check Authors.rst
+      if: always()
+      run: python ci/authors-rst.py
+    - name: Check for missing documentation
+      if: always()
+      run: python ci/script-docs.py
+    - name: Check Lua syntax
+      if: always()
+      run: python ci/script-syntax.py --ext=lua --cmd="luac5.3 -p" --github-actions