From 66c00f08dca62cf0a8cfe96f38c80e45a72b11d0 Mon Sep 17 00:00:00 2001
From: Akira Matsuda <ronnie@dio.jp>
Date: Sun, 16 Feb 2025 22:40:31 +0900
Subject: [PATCH 1/4] Configure preview action

copied from README at https://github.com/rossjrw/pr-preview-action
and configured to build jekyll
---
 .github/workflows/preview.yml | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 .github/workflows/preview.yml

diff --git a/.github/workflows/preview.yml b/.github/workflows/preview.yml
new file mode 100644
index 000000000..f60ca4f99
--- /dev/null
+++ b/.github/workflows/preview.yml
@@ -0,0 +1,33 @@
+name: Deploy PR previews
+
+on:
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+      - closed
+
+concurrency: preview-${{ github.ref }}
+
+jobs:
+  deploy-preview:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "3.3"
+          bundler-cache: true
+
+      - name: Build with Jekyll
+        run: bundle exec jekyll build
+        env:
+          JEKYLL_ENV: production
+
+      - name: Deploy preview
+        uses: rossjrw/pr-preview-action@v1
+        with:
+          source-dir: ./_site/

From 62b997ddf463bf7cfcf7b80c4e8c85f80ea00331 Mon Sep 17 00:00:00 2001
From: Akira Matsuda <ronnie@dio.jp>
Date: Sun, 16 Feb 2025 22:44:12 +0900
Subject: [PATCH 2/4] Deploy previews to rubima/rubima-preview

---
 .github/workflows/preview.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.github/workflows/preview.yml b/.github/workflows/preview.yml
index f60ca4f99..06e559e1e 100644
--- a/.github/workflows/preview.yml
+++ b/.github/workflows/preview.yml
@@ -31,3 +31,5 @@ jobs:
         uses: rossjrw/pr-preview-action@v1
         with:
           source-dir: ./_site/
+          deploy-repository: rubima/rubima-preview
+          token: ${{ secrets.PREVIEW_TOKEN }}

From fd24e260af4246513ccd439ca6f1b432d095a411 Mon Sep 17 00:00:00 2001
From: Akira Matsuda <ronnie@dio.jp>
Date: Sun, 16 Feb 2025 22:44:36 +0900
Subject: [PATCH 3/4] Fetch origin/master after checking out the repo

so we can perform git-diff to know which files has been changed in the
patch.
---
 .github/workflows/preview.yml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/.github/workflows/preview.yml b/.github/workflows/preview.yml
index 06e559e1e..723ad8088 100644
--- a/.github/workflows/preview.yml
+++ b/.github/workflows/preview.yml
@@ -16,6 +16,13 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+      - name: Fetch master
+        run: |
+          commits=${{ github.event.pull_request.commits }}
+          if [[ -n "$commits" ]]; then
+            # Prepare enough depth for diffs with master
+            git fetch --depth="$(( commits + 1 ))"
+          fi
 
       - uses: ruby/setup-ruby@v1
         with:

From f0d0aa1c5786b10938f1bdc9d3cf59d7b3ed4b8e Mon Sep 17 00:00:00 2001
From: Akira Matsuda <ronnie@dio.jp>
Date: Sun, 16 Feb 2025 23:00:45 +0900
Subject: [PATCH 4/4] Remove unrelated images from _site before deploying to
 preview repo

because the whole build result for 20 years of Rubima is too huge, and
most of the size is taken up by images.
---
 .github/workflows/preview.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.github/workflows/preview.yml b/.github/workflows/preview.yml
index 723ad8088..73a4a9df5 100644
--- a/.github/workflows/preview.yml
+++ b/.github/workflows/preview.yml
@@ -34,6 +34,9 @@ jobs:
         env:
           JEKYLL_ENV: production
 
+      - name: Remove unrelated images
+        run: git diff --name-only origin/master --relative=articles | ruby -nle 'puts $_[%r([0-9]{4}-[0-9]{2}-[0-9]{2}-([0-9]{4}-.+)\.md), 1]' | tr '\n' ',' | ruby -rfileutils -nle 'Dir.chdir("_site/images") { Dir.glob("*").each { FileUtils.rm_r(_1) if File.directory?(_1) && !$_.split(",").include?(_1) } }'
+
       - name: Deploy preview
         uses: rossjrw/pr-preview-action@v1
         with: