Use Rocky8-based Docker image for Linux builds (#100)

.github/build_linux.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+set -xe
+
+readonly build=$(git rev-list --abbrev-commit --max-count=1 HEAD)
+sed -i "s/@GIT_COMMIT@/$build/" buildinfo.pas
+
+pushd test
+lazbuild transguitest.lpi "--lazarusdir=${TRANSGUI_LAZARUS_DIR}"
+./units/transguitest -a
+popd
+
+lazbuild transgui.lpi --ws=qt5 --build-mode=Release "--lazarusdir=${TRANSGUI_LAZARUS_DIR}"
+cd units
+
+readonly app_ver=$(xmllint --xpath 'string(//StringTable/@ProductVersion)' ../transgui.lpi)
+LINUXDEPLOY_OUTPUT_VERSION=$app_ver linuxdeploy-x86_64.AppImage \
+  -e transgui --create-desktop-file --appdir AppDir \
+  --output appimage -i ../transgui.png --plugin qt
+sha256sum transgui-${app_ver}-x86_64.AppImage
+mv transgui-${app_ver}-x86_64.AppImage transgui-x86_64.AppImage

.github/workflows/ubuntu.yml → .github/workflows/linux.yml

@@ -1,4 +1,4 @@
-name: Ubuntu Build
+name: Linux Build
 
 on:
   push:
@@ -7,23 +7,21 @@ on:
     branches: [main, develop]
 
 jobs:
-  build-ubuntu:
+  build-linux:
 
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
+    container: lighterowl/transgui-sdk:1.0
 
     steps:
     - uses: actions/checkout@v1
       with:
         submodules: recursive
 
-    - uses: actions/cache@v4
-      with:
-        path: |
-          ~/.transgui_sdk/lazarus
-          ~/.transgui_sdk/fpc-3.2.4-rc1
-        key: ubuntu-fpc-lazarus
-
-    - run: .github/build_ubuntu.sh
+    - run: |
+        git config --global --add safe.directory /__w/transgui/transgui
+        export HOME=/root
+        source /root/.transgui_sdk/source.me
+        ./.github/build_linux.sh
 
     - uses: actions/upload-artifact@v4
       with:

README.md

@@ -14,7 +14,7 @@ cd transgui
 lazbuild transgui.lpi
 ```
 
-If you hit trouble, have a look at `build_` scripts in the `.github` folder. They are used to build the project for each of the supported platforms in GitHub Actions.
+If you hit trouble, have a look at `build_` scripts in the `.github` folder. They are used to build the project for each of the supported platforms in GitHub Actions. If you can run Docker containers, you might find it easier to just use [`lighterowl/transgui-sdk`](https://hub.docker.com/r/lighterowl/transgui-sdk/) which includes the proper versions of FPC and Lazarus.
 
 Due to issues with fpc 3.2.2 mentioned below, it is recommended to build transgui with a development version of the Free Pascal compiler. The `build_` scripts include necessary code that downloads and compiles the development version from source.