feat: Add github action for docgen

.github/workflows/docgen.yml

@@ -0,0 +1,30 @@
+name: docgen
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  docgen:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-go@v2
+        with:
+          go-version: '^1.17.1'
+      - name: Install md2vim
+        run: go get github.com/FooSoft/md2vim
+      - name: Generate vim docs
+        run: make docs
+      - name: Commit changes
+        env:
+          COMMIT_MSG: |
+            [docgen] Update doc/neogen.txt
+            skip-checks: true
+        run: |
+          git config user.name github-actions
+          git config user.email github-actions@github.com
+          git add doc/neogen.txt
+          # Only commit and push if we have changes
+          git diff --quiet && git diff --staged --quiet || (git commit -m "${COMMIT_MSG}"; git push)

Makefile

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+docs:
+	md2vim -desc "*neogen* *neogen.nvim*\n* NOTE: This file is autogenerated from docs/DOCS.md file" docs/DOCS.md doc/neogen.txt

docs/DOCS.md

@@ -0,0 +1 @@
+salut