ci: automatically use latest imagemagick minor version in bundle

The archives of deprecated minor versions tend to disappear from the
website. This patch makes the CI locate and fetch the latest minor
version automatically for inclusion in the bundle archive.

GitHub: closes #281

1 files changed, 13 insertions, 9 deletions

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d877ffc..48b0819 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -102,7 +102,7 @@ jobs:
       - name: Install build dependencies
         run: |
           sudo apt-get update -qq
-          sudo apt-get install -y pandoc wget p7zip-full
+          sudo apt-get install -y pandoc wget curl html-xml-utils p7zip-full
       - name: Copy scripts
         run: |
           mkdir dist/scripts
@@ -114,16 +114,20 @@ jobs:
           pandoc --standalone --to html viewer/ldgallery-viewer.7.md --output dist/ldgallery-viewer.7.html
           pandoc --standalone --to html changelog.md --output dist/changelog.html
           pandoc --standalone --to html license.md --output dist/license.html
-      # TODO: automatically get the latest imagemagick version, since old archives disappear from the website
-      # See https://github.com/ldgallery/ldgallery/issues/281
       - name: Bundle ImageMagick
         run: |
-          wget -O magick.zip \
-            https://download.imagemagick.org/ImageMagick/download/binaries/ImageMagick-7.1.0-2-portable-Q16-x64.zip
-          7z e magick.zip -odist/ magick.exe
-          7z e magick.zip -so LICENSE.txt > dist/magick.license.txt
-          7z e magick.zip -so NOTICE.txt > dist/magick.notice.txt
-          7z e magick.zip -so README.txt > dist/magick.readme.txt
+          MAGICK_ARCHIVES="https://download.imagemagick.org/ImageMagick/download/binaries/"
+          MAGICK_LATEST=$( \
+            curl --silent "$MAGICK_ARCHIVES" \
+            | hxclean \
+            | hxselect 'a::attr(href)' -c -s '\n' \
+            | grep -m1 '^ImageMagick-7.*portable-Q16-x64.zip$' )
+          mkdir -p ~/downloads
+          wget --timestamping --directory-prefix ~/downloads "$MAGICK_ARCHIVES/$MAGICK_LATEST"
+          7z e ~/downloads/"$MAGICK_LATEST" -odist/ magick.exe
+          7z e ~/downloads/"$MAGICK_LATEST" -so LICENSE.txt > dist/magick.license.txt
+          7z e ~/downloads/"$MAGICK_LATEST" -so NOTICE.txt > dist/magick.notice.txt
+          7z e ~/downloads/"$MAGICK_LATEST" -so README.txt > dist/magick.readme.txt
       - uses: actions/upload-artifact@v2
         with:
           name: archive-win64