32-bit build for Linux (#14)

* Separated Linux build jobs from macOS and Windows build jobs.
  * 32-bit binaries for Linux must be built in a 32-bit container. I used Debian.
  * Hence, it made sense to use a 64-bit Debian container to build the 64-bit binaries, ditching Ubuntu.
* Used older versions of the checkout and upload actions for Linux builds.
  * The newer versions don't work in containers.
    * actions/runner#2115
    * actions/upload-artifact#361
    * actions/checkout#1681
  * Consequently, the an older version of the corresponding download action must be used.
  * The older upload action doesn't recognise wildcard patters, so specified the `bin` directory to upload.
  * Did the same for the newer upload action for consistency.
* Moved `env` next to the step which requires the token.
* Tried to build the binaries in ARM containers, but the Linux runner is an AMD64 machine, so it didn't work.
  * The macOS runner which is an ARM machine does not have Docker, so couldn't use it, either.

.github/workflows/package.yml

@@ -7,42 +7,65 @@ on:
   workflow_dispatch:
 
 jobs:
-  build:
+  build_macos_windows:
     name: build on ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-13, macos-14, ubuntu-22.04, windows-2022]
+        os: [macos-13, macos-14, windows-2022]
     steps:
       - uses: actions/checkout@v4
-      - if: runner.os == 'Linux'
-        run: sudo apt install libnotify-dev
       - run: make -j release CC=gcc
         working-directory: custom-prompt
       - uses: actions/upload-artifact@v4
         with:
           name: ${{ matrix.os }}
-          path: 'custom-prompt/bin/*'
+          path: 'custom-prompt/bin'
+
+  build_linux:
+    name: build on ${{ matrix.arch }}/debian:12
+    runs-on: ubuntu-22.04
+    container: ${{ matrix.arch }}/debian:12
+    strategy:
+      matrix:
+        arch: [amd64, i386]
+    steps:
+      - run: apt update && apt install -y build-essential git libnotify-dev libx11-dev
+      - uses: actions/checkout@v1
+      - run: make -j release
+        working-directory: custom-prompt
+      - uses: actions/upload-artifact@v1
+        with:
+          name: ${{ matrix.arch }}
+          path: 'custom-prompt/bin'
 
   release:
     if: github.ref_type == 'tag'
-    needs: build
+    needs: [build_macos_windows, build_linux]
     runs-on: ubuntu-22.04
-    env:
-      GH_TOKEN: ${{ github.token }}
     permissions: write-all
     steps:
       - uses: actions/checkout@v4
       - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v1
+        with:
+          name: amd64
+      - uses: actions/download-artifact@v1
+        with:
+          name: i386
       - run: chmod +x . -R
-      - run: tar czf custom-prompt-amd64-macos.tgz *
+      - run: tar vczf custom-prompt-amd64-macos.tgz *
         working-directory: macos-13
-      - run: tar czf custom-prompt-aarch64-macos.tgz *
+      - run: tar vczf custom-prompt-aarch64-macos.tgz *
         working-directory: macos-14
-      - run: tar czf custom-prompt-amd64-linux.tgz *
-        working-directory: ubuntu-22.04
-      - run: tar czf custom-prompt-amd64-windows.tgz *
+      - run: tar vczf custom-prompt-amd64-windows.tgz *
         working-directory: windows-2022
+      - run: tar vczf custom-prompt-amd64-linux.tgz *
+        working-directory: amd64
+      - run: tar vczf custom-prompt-i386-linux.tgz *
+        working-directory: i386
       - run: |
           gh release create ${{ github.ref_name }} -t ${{ github.ref_name }} -n 'Release intended as proof-of-concept. Binaries are dynamically-linked.'
           gh release upload ${{ github.ref_name }} */*.tgz
+        env:
+          GH_TOKEN: ${{ github.token }}