feat: add chars method for builtin str #51

	name: Build and Test Musl
	on:
	pull_request:
	branches:
	- main
	push:
	branches:
	- main
	jobs:
	build-and-test-musl:
	name: Build and Test on Alpine Linux (musl)
	runs-on: ubuntu-latest
	steps:
	- name: Check out code
	uses: actions/checkout@v3
	with:
	submodules: "true"
	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v2
	- name: Pull Alpine Linux Docker image
	run: \|
	docker pull alpine:latest
	- name: Build in Docker
	run: \|
	docker run --rm \
	-v ${{ github.workspace }}:/workspace -w /workspace \
	alpine:latest \
	/bin/sh -c "
	apk add --no-cache \
	bash \
	git \
	make \
	gcc \
	musl-dev \
	python3 \
	python3-dev \
	py3-pip \
	rust \
	cargo \
	&& \
	export KCL_BUILD_GIT_SHA=$(git rev-parse HEAD) && \
	git config --global --add safe.directory /workspace && \
	git config --global user.name 'GitHub Action' && \
	git config --global user.email '[email protected]' && \
	make && \
	make release && \
	_build/dist/linux/kclvm/bin/kclvm_cli version"
	- name: Read VERSION file
	id: read_version
	run: \|
	VERSION=$(cat VERSION)
	echo "VERSION=v${VERSION}" >> $GITHUB_ENV
	- name: Upload Artifact
	uses: actions/upload-artifact@v4
	with:
	name: kcl-${{ env.VERSION }}-linux-musl
	if-no-files-found: error
	path: _build/kclvm-${{ env.VERSION }}-linux-amd64.tar.gz

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