Added: Add support for TERMUX_APP_PACKAGE_MANAGER and TERMUX_APP_PACKAGE_VARIANT to build APKs with different package manager configurations

The `TermuxBootstrap` class has been added that defines the `PackageManager` and `PackageVariant` classes for the supported package manager configurations for the app. The variant is defined by the `project.ext.packageVariant` value in the `app/build.gradle` and its value is used by the `build.gradle` to pack its respective bootstrap zips in the app APK at build time and the value is used to set `TermuxBootstrap.TERMUX_APP_PACKAGE_MANAGER` and `TermuxBootstrap.TERMUX_APP_PACKAGE_VARIANT` static values that are used at runtime by the app to run variant specific code. The manager is automatically extracted from the variant as the substring before first dash `-`.

The default variant is `apt-android-7` and it can either be replaced in `app/build.gradle` manually or the `TERMUX_PACKAGE_VARIANT` env variable can be exported in which the build command is run.

The `TERMUX_APP_PACKAGE_MANAGER` and `TERMUX_APP_PACKAGE_VARIANT` environmental variables will be exported by the app and they will also be added in Termux app info in about page and reports, allowing users and devs to know which variant is currently installed.

Bootstrap of a different variant must not be manually installed by the user after app installation by replacing `$PREFIX` since app code is dependant on the variant used to build the APK.

Currently, `apt-android-7` and `apt-android-5` variants will be built for by the workflows but they will fail for `apt-android-5` since `build.gradle` support is currently not enabled and will be enabled by a pull request that adds support for Android 5. The workflow needs to try to build the `apt-android-5` variant so that pull request builds are generated.

.github/workflows/attach_debug_apks_to_release.yml

@@ -8,8 +8,13 @@ on:
 jobs:
   attach-apks:
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        package_variant: [ apt-android-7, apt-android-5 ]
     env:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
     steps:
       - name: Clone repository
         uses: actions/checkout@v2
@@ -18,6 +23,8 @@ jobs:
 
       - name: Build and attach APKs to release
         shell: bash {0}
+        env:
+          PACKAGE_VARIANT: ${{ matrix.package_variant }}
         run: |
           exit_on_error() {
               echo "$1"
@@ -34,13 +41,14 @@ jobs:
           fi
 
           APK_DIR_PATH="./app/build/outputs/apk/debug"
-          APK_VERSION_TAG="$RELEASE_VERSION_NAME+github-debug"
+          APK_VERSION_TAG="$RELEASE_VERSION_NAME+${{ env.PACKAGE_VARIANT }}-github-debug"
           APK_BASENAME_PREFIX="termux-app_$APK_VERSION_TAG"
 
-          echo "Building APKs for '$RELEASE_VERSION_NAME' release"
+          echo "Building APKs for 'APK_VERSION_TAG' release"
           export TERMUX_APK_VERSION_TAG="$APK_VERSION_TAG" # Used by app/build.gradle
+          export TERMUX_PACKAGE_VARIANT="${{ env.PACKAGE_VARIANT }}" # Used by app/build.gradle
           if ! ./gradlew assembleDebug; then
-            exit_on_error "Build failed for '$RELEASE_VERSION_NAME' release."
+            exit_on_error "Build failed for '$APK_VERSION_TAG' release."
           fi
 
           echo "Validating APKs"
@@ -58,8 +66,8 @@ jobs:
             "${APK_BASENAME_PREFIX}_armeabi-v7a.apk" \
             "${APK_BASENAME_PREFIX}_x86_64.apk" \
             "${APK_BASENAME_PREFIX}_x86.apk" \
-            > sha256sums); then
-            exit_on_error "Generate sha25sums failed for '$RELEASE_VERSION_NAME' release."
+            > "${APK_BASENAME_PREFIX}_sha256sums"); then
+            exit_on_error "Generate sha25sums failed for '$APK_VERSION_TAG' release."
           fi
 
           echo "Attaching APKs to github release"
@@ -70,7 +78,7 @@ jobs:
           -a "$APK_DIR_PATH/${APK_BASENAME_PREFIX}_armeabi-v7a.apk" \
           -a "$APK_DIR_PATH/${APK_BASENAME_PREFIX}_x86_64.apk" \
           -a "$APK_DIR_PATH/${APK_BASENAME_PREFIX}_x86.apk" \
-          -a "$APK_DIR_PATH/sha256sums" \
+          -a "$APK_DIR_PATH/${APK_BASENAME_PREFIX}_sha256sums" \
           "$RELEASE_VERSION_NAME"; then
-            exit_on_error "Attach APKs to release failed for '$RELEASE_VERSION_NAME' release."
+            exit_on_error "Attach APKs to release failed for '$APK_VERSION_TAG' release."
           fi

.github/workflows/debug_build.yml

@@ -11,12 +11,19 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        package_variant: [ apt-android-7, apt-android-5 ]
+
     steps:
       - name: Clone repository
         uses: actions/checkout@v2
 
       - name: Build APKs
         shell: bash {0}
+        env:
+          PACKAGE_VARIANT: ${{ matrix.package_variant }}
         run: |
           exit_on_error() { echo "$1"; exit 1; }
 
@@ -35,7 +42,7 @@ jobs:
           fi
 
           APK_DIR_PATH="./app/build/outputs/apk/debug"
-          APK_VERSION_TAG="$RELEASE_VERSION_NAME-github-debug" # Note the "-", GITHUB_SHA will already have "+" before it
+          APK_VERSION_TAG="$RELEASE_VERSION_NAME-${{ env.PACKAGE_VARIANT }}-github-debug" # Note the "-", GITHUB_SHA will already have "+" before it
           APK_BASENAME_PREFIX="termux-app_$APK_VERSION_TAG"
 
           # Used by attachment steps later
@@ -43,11 +50,12 @@ jobs:
           echo "APK_VERSION_TAG=$APK_VERSION_TAG" >> $GITHUB_ENV
           echo "APK_BASENAME_PREFIX=$APK_BASENAME_PREFIX" >> $GITHUB_ENV
 
-          echo "Building APKs for '$RELEASE_VERSION_NAME' build"
+          echo "Building APKs for 'APK_VERSION_TAG' build"
           export TERMUX_APP_VERSION_NAME="${RELEASE_VERSION_NAME/v/}" # Used by app/build.gradle
           export TERMUX_APK_VERSION_TAG="$APK_VERSION_TAG" # Used by app/build.gradle
+          export TERMUX_PACKAGE_VARIANT="${{ env.PACKAGE_VARIANT }}" # Used by app/build.gradle
           if ! ./gradlew assembleDebug; then
-            exit_on_error "Build failed for '$RELEASE_VERSION_NAME' build."
+            exit_on_error "Build failed for '$APK_VERSION_TAG' build."
           fi
 
           echo "Validating APKs"
@@ -65,8 +73,8 @@ jobs:
             "${APK_BASENAME_PREFIX}_armeabi-v7a.apk" \
             "${APK_BASENAME_PREFIX}_x86_64.apk" \
             "${APK_BASENAME_PREFIX}_x86.apk" \
-            > sha256sums); then
-            exit_on_error "Generate sha25sums failed for '$RELEASE_VERSION_NAME' release."
+            > "${APK_BASENAME_PREFIX}_sha256sums"); then
+            exit_on_error "Generate sha25sums failed for '$APK_VERSION_TAG' release."
           fi
 
       - name: Attach universal APK file
@@ -112,7 +120,7 @@ jobs:
       - name: Attach sha256sums file
         uses: actions/upload-artifact@v2
         with:
-          name: sha256sums
+          name: ${{ env.APK_BASENAME_PREFIX }}_sha256sums
           path: |
-            ${{ env.APK_DIR_PATH }}/sha256sums
+            ${{ env.APK_DIR_PATH }}/${{ env.APK_BASENAME_PREFIX }}_sha256sums
             ${{ env.APK_DIR_PATH }}/output-metadata.json