Alpine package builder action

Signed-off-by: Vasiliy Doylov <nekocwd@mainlining.org>

action.yaml

@@ -0,0 +1,61 @@
+name: "Build alpine package"
+description: "Build alpine package using pmbootstrap"
+inputs:
+  name:
+    description: "aport name to build"
+    required: true
+  aports:
+    description: "directory containing the APKBUILD file"
+    required: true
+  arch:
+    description: "arch to build"
+    required: true
+    default: aarch64
+  src:
+    description: "source dir"
+    required: true
+
+outputs:
+  packages:
+    description: "Built files"
+    value: ${{steps.built-packages.outputs.packages}}
+
+runs:
+  using: "composite"
+  steps:
+    - name: Set up dirrectories
+      shell: sh
+      run: >
+        mkdir -p {{env.PMB_WORK}}/packages/edge/${{inputs.arch}} &&
+        mkdir -p ${{env.PMB_PMAPORTS}}/nekocwd &&
+        rm -rf ${{env.PMB_PMAPORTS}}/nekocwd/${{inputs.name}}
+
+    - name: List packages
+      id: old-packages
+      shell: sh
+      run: ${{ github.action_path }}/get_packages
+      env:
+        PKGDIR: ${{env.PMB_WORK}}/packages/edge/${{inputs.arch}}
+
+    - name: Copy APKBUILD to this dir
+      run: cp -rfpv ${{inputs.aports}} ${{env.PMB_PMAPORTS}}/nekocwd/${{inputs.name}}
+      shell: sh
+
+    - name: Run PostmarketOS build
+      run: pmbootstrap build --force ${{inputs.name}} --src ${{inputs.src}} --arch ${{inputs.arch}}
+      shell: sh
+
+    - name: List packages
+      id: new-packages
+      shell: sh
+      run: ${{ github.action_path }}/get_packages
+      env:
+        PKGDIR: ${{env.PMB_WORK}}/packages/edge/${{inputs.arch}}
+
+    - name: Get built packages
+      id: built-packages
+      shell: sh
+      run: ${{ github.action_path }}/get_exclusive
+      env:
+        OLD_PACKAGES: ${{steps.old-packages.outputs.packages}}
+        NEW_PACKAGES: ${{steps.new-packages.outputs.packages}}

get_exclusive

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+main_list=($NEW_PACKAGES)
+remove_list=($OLD_PACKAGES)
+
+temp_file=$(mktemp)
+
+for line in "${main_list[@]}"; do
+    if ! printf '%s\n' "${remove_list[@]}" | grep -qx "$line"; then
+        echo "$line" >> "$temp_file"
+    fi
+done
+
+echo packages=$(cat $temp_file) >> $GITHUB_OUTPUT
+rm "$temp_file"

get_packages

@@ -0,0 +1 @@
+echo packages=$(ls ${PKGDIR}/*.apk 2> /dev/null || true) >> $GITHUB_OUTPUT