ci: convert GitLab variables to Github actions

.gitlab/bin/apkbuild-shellcheck

@@ -13,4 +13,4 @@ shellcheck -s ash \
         -e SC2030 \
         -e SC2031 \
         -e SC1090 \
-        -xa $CI_PROJECT_DIR/.gitlab/bin/APKBUILD_SHIM
+        -xa $GITHUB_WORKSPACE/.gitlab/bin/APKBUILD_SHIM

.gitlab/bin/build.sh

@@ -1,23 +1,23 @@
 #!/bin/sh
 # shellcheck disable=SC3043
 
-. $CI_PROJECT_DIR/.gitlab/bin/functions.sh
+. $GITHUB_WORKSPACE/.gitlab/bin/functions.sh
 
 # shellcheck disable=SC3040
 set -eu -o pipefail
 
-readonly APORTSDIR=$CI_PROJECT_DIR
+readonly APORTSDIR=$GITHUB_WORKSPACE
 readonly REPOS="cross backports user testing community"
 readonly ALPINE_REPOS="main community"
 readonly ARCH=$(apk --print-arch)
 # gitlab variables
-readonly BASEBRANCH=$CI_MERGE_REQUEST_TARGET_BRANCH_NAME
+readonly BASEBRANCH=$GITHUB_BASE_REF
 
 : "${REPODEST:=$HOME/packages}"
 : "${MIRROR:=https://lab.ilot.io/ayakael/repo-apk/-/raw}"
 : "${ALPINE_MIRROR:=http://dl-cdn.alpinelinux.org/alpine}"
 : "${MAX_ARTIFACT_SIZE:=300000000}" #300M
-: "${CI_DEBUG_BUILD:=}"
+: "${RUNNER_DEBUG:=}"
 
 : "${CI_ALPINE_BUILD_OFFSET:=0}"
 : "${CI_ALPINE_BUILD_LIMIT:=9999}"
@@ -42,7 +42,7 @@ verbose() {
 }
 
 debugging() {
-	[ -n "$CI_DEBUG_BUILD" ]
+	[ -n "$RUNNER_DEBUG" ]
 }
 
 debug() {
@@ -152,7 +152,7 @@ setup_system() {
 	sudo cp $HOME/.abuild/$ABUILD_KEY_NAME.rsa.pub /etc/apk/keys/$ABUILD_KEY_NAME.rsa.pub
 
 	# patch abuild for crosscompiling
-	sudo patch -p1 -d / -i $CI_PROJECT_DIR/.gitlab/patches/abuild-cross.patch
+	sudo patch -p1 -d / -i $GITHUB_WORKSPACE/.gitlab/patches/abuild-cross.patch
 
 	sudo sed -i -E 's/export JOBS=[0-9]+$/export JOBS=$(nproc)/' /etc/abuild.conf
 	( . /etc/abuild.conf && echo "Building with $JOBS jobs" )
@@ -208,7 +208,7 @@ sudo chown -R $USER: .
 fetch_flags="-qn"
 debugging && fetch_flags="-v"
 
-git fetch $fetch_flags "$CI_MERGE_REQUEST_PROJECT_URL" \
+git fetch $fetch_flags "$GITHUB_SERVER_URL/$GITHUB_REPOSITORY" \
 	"+refs/heads/$BASEBRANCH:refs/heads/$BASEBRANCH"
 
 if debugging; then

.gitlab/bin/changed-aports

@@ -14,7 +14,7 @@ basebranch=$1
 
 if ! git rev-parse --verify --quiet $basebranch >/dev/null; then
     # The base branch does not eixst, probably due to a shallow clone
-    git fetch -v $CI_MERGE_REQUEST_PROJECT_URL.git +refs/heads/$basebranch:refs/heads/$basebranch
+    git fetch -v $GITHUB_SERVER_URL/$GITHUB_REPOSITORY.git +refs/heads/$basebranch:refs/heads/$basebranch
 fi
 
 git --no-pager diff --diff-filter=ACMR --name-only $basebranch...HEAD -- "*/APKBUILD" | xargs -r -n1 dirname

.gitlab/bin/lint

@@ -4,7 +4,7 @@ BLUE="\e[34m"
 MAGENTA="\e[35m"
 RESET="\e[0m"
 
-readonly BASEBRANCH=$CI_MERGE_REQUEST_TARGET_BRANCH_NAME
+readonly BASEBRANCH=$GITHUB_BASE_REF
 
 verbose() {
     echo "> " "$@"
@@ -13,7 +13,7 @@ verbose() {
 }
 
 debugging() {
-    [ -n "$CI_DEBUG_BUILD" ]
+    [ -n "$RUNNER_DEBUG" ]
 }
 
 debug() {
@@ -28,7 +28,7 @@ sudo chown -R gitlab-runner: .
 fetch_flags="-qn"
 debugging && fetch_flags="-v"
 
-git fetch $fetch_flags "$CI_MERGE_REQUEST_PROJECT_URL" \
+git fetch $fetch_flags "$GITHUB_SERVER_URL/$GITHUB_REPOSITORY" \
 	"+refs/heads/$BASEBRANCH:refs/heads/$BASEBRANCH"
 
 if debugging; then

.gitlab/bin/push.sh

@@ -2,14 +2,14 @@
 
 # shellcheck disable=SC3043
 
-. $CI_PROJECT_DIR/.gitlab/bin/functions.sh
+. $GITHUB_WORKSPACE/.gitlab/bin/functions.sh
 
 # shellcheck disable=SC3040
 set -eu -o pipefail
 
-readonly APORTSDIR=$CI_PROJECT_DIR
+readonly APORTSDIR=$GITHUB_WORKSPACE
 readonly REPOS="backports user"
-readonly BASEBRANCH=$CI_MERGE_REQUEST_TARGET_BRANCH_NAME
+readonly BASEBRANCH=$GITHUB_BASE_REF
 
 export GIT_SSH_COMMAND="ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no"
 
@@ -38,7 +38,7 @@ for i in $(find packages -type f -name "*.apk"); do
 done
 
 fetch_flags="-qn"
-git fetch $fetch_flags "$CI_MERGE_REQUEST_PROJECT_URL" \
+git fetch $fetch_flags "$GITHUB_SERVER_URL/$GITHUB_REPOSITORY" \
 	"+refs/heads/$BASEBRANCH:refs/heads/$BASEBRANCH"
 
 for repo in $(changed_repos); do
@@ -49,10 +49,9 @@ for repo in $(changed_repos); do
 	for i in $(find $HOME/repo-apk/$repo -maxdepth 1 -mindepth 1 -printf '%P '); do
 		CHOST=$i abuild index
 	done
-	cd "$CI_PROJECT_DIR"
+	cd "$GITHUB_WORKSPACE"
 	rm -R $repo/DUMMY
 done
-
 git -C $HOME/repo-apk add .
 git -C $HOME/repo-apk commit -m "Update from $CI_MERGE_REQUEST_IID - $CI_MERGE_REQUEST_TITLE"
 git -C $HOME/repo-apk annex sync --content