ci: extract publish workflow for manual releases (#60)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: FBumann

.github/workflows/publish.yml

@@ -0,0 +1,43 @@
+name: Publish
+
+on:
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: 'Release tag to publish (e.g. v0.0.15)'
+        required: true
+        type: string
+  workflow_call:
+    inputs:
+      tag:
+        required: true
+        type: string
+
+jobs:
+  publish:
+    name: Build & publish to PyPI
+    runs-on: ubuntu-24.04
+    timeout-minutes: 10
+    environment:
+      name: pypi
+      url: https://pypi.org/project/xarray_plotly
+    permissions:
+      id-token: write
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          ref: ${{ inputs.tag }}
+          fetch-depth: 0
+
+      - uses: astral-sh/setup-uv@v7
+        with:
+          enable-cache: true
+
+      - uses: actions/setup-python@v6
+        with:
+          python-version: "3.12"
+
+      - name: Build
+        run: uv build
+
+      - uses: pypa/gh-action-pypi-publish@release/v1

.github/workflows/release.yml

@@ -42,31 +42,10 @@ jobs:
           prerelease: ${{ inputs.prerelease }}
 
   publish:
-    name: Build & publish to PyPI
     needs: [release-please]
     if: needs.release-please.outputs.release_created
-    runs-on: ubuntu-24.04
-    timeout-minutes: 10
-    environment:
-      name: pypi
-      url: https://pypi.org/project/xarray_plotly
     permissions:
       id-token: write
-    steps:
-      - uses: actions/checkout@v6
-        with:
-          ref: ${{ needs.release-please.outputs.tag_name }}
-          fetch-depth: 0
-
-      - uses: astral-sh/setup-uv@v7
-        with:
-          enable-cache: true
-
-      - uses: actions/setup-python@v6
-        with:
-          python-version: "3.12"
-
-      - name: Build
-        run: uv build
-
-      - uses: pypa/gh-action-pypi-publish@release/v1
+    uses: ./.github/workflows/publish.yml
+    with:
+      tag: ${{ needs.release-please.outputs.tag_name }}