Use environment variable for filename

Author: PHPirates

.github/workflows/release-pdf-on-tag.yml

@@ -5,19 +5,22 @@ on:
     tags:
       - '*'
 
+env:
+  FILE: main
+
 jobs:
   build:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
         uses: actions/checkout@v1
       - name: Compile
-        run: docker run --mount src=$GITHUB_WORKSPACE/src,target=/usr/src/tex,type=bind dxjoke/tectonic-docker /bin/sh -c "tectonic main.tex"
+        run: docker run --mount src=$GITHUB_WORKSPACE/src,target=/usr/src/tex,type=bind dxjoke/tectonic-docker /bin/sh -c "tectonic $FILE.tex"
       - name: Upload pdf
         uses: actions/upload-artifact@v2
         with:
           name: main.zip
-          path: src/main.pdf
+          path: src/*.pdf
       - name: Create Release
         id: create_release
         uses: actions/create-release@v1
@@ -35,6 +38,6 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
           upload_url: ${{ steps.create_release.outputs.upload_url }}
-          asset_path: ./src/main.pdf
-          asset_name: main.pdf
+          asset_path: ./src/$FILE.pdf
+          asset_name: $FILE.pdf
           asset_content_type: application/pdf