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Add option to skip downloading shellcheck on every run #108

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4 changes: 3 additions & 1 deletion README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -157,7 +157,7 @@ Shellcheck can print output in these formats: `checkstyle`, `diff`, `gcc`, `json

## Run a specific version of Shellcheck

If running the latest stable version of Shellcheck is not to your liking, you can specify a concrete version of Shellcheck to be used. When specifying a custom version, please use any of the released versions listed in the [Shellcheck repository](https://github.com/koalaman/shellcheck/tags).
If downloading the latest stable version of Shellcheck on each run is not to your liking, you can specify a concrete version of Shellcheck to be used, or skip downloading altogether in favor of pre-installed shellcheck in GitHub-hosted runners. When specifying a concrete version, please use any of the released versions listed in the [Shellcheck repository](https://github.com/koalaman/shellcheck/tags).

```yaml
...
Expand All @@ -166,3 +166,5 @@ If running the latest stable version of Shellcheck is not to your liking, you ca
with:
version: v0.9.0
```

To skip downloading shellcheck, use the special value `version: system`. Note that the version of Shellcheck [present in GitHub Actions runner images](https://github.com/actions/runner-images) might be behind the latest released version of Shellcheck.
30 changes: 16 additions & 14 deletions action.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -41,7 +41,7 @@ inputs:
required: false
default: "gcc"
version:
description: "Specify a concrete version of ShellCheck to use"
description: "The version of ShellCheck to download. Set to 'system' to use pre-installed shellcheck."
required: false
default: "stable"
outputs:
Expand All @@ -61,26 +61,30 @@ runs:
shell: bash
env:
INPUT_VERSION: ${{ inputs.version }}
OS_NAME: ${{ runner.os }}
run: |
if [[ "${{ runner.os }}" == "macOS" ]]; then
if [ "${INPUT_VERSION}" = "system" ]; then
echo "Using system shellcheck: $(command -v shellcheck)"
exit 0
fi

if [ "${OS_NAME}" = "macOS" ]; then
osvariant="darwin"
download_dir="$(mktemp -d -t shellcheck)"
else
osvariant="linux"
download_dir="$(mktemp -d --tmpdir shellcheck.XXX)"
fi

baseurl="https://github.com/koalaman/shellcheck/releases/download"

curl -Lso "${{ github.action_path }}/sc.tar.xz" \
"${baseurl}/${INPUT_VERSION}/shellcheck-${INPUT_VERSION}.${osvariant}.x86_64.tar.xz"
curl -fsSL "https://github.com/koalaman/shellcheck/releases/download/${INPUT_VERSION}/shellcheck-${INPUT_VERSION}.${osvariant}.x86_64.tar.xz" | \
tar -xz -C "${download_dir}" --strip-components 1 -- "shellcheck-${INPUT_VERSION}/shellcheck"

tar -xf "${{ github.action_path }}/sc.tar.xz" -C "${{ github.action_path }}"
mv "${{ github.action_path }}/shellcheck-${INPUT_VERSION}/shellcheck" \
"${{ github.action_path }}/shellcheck"
echo "${download_dir}" >> "$GITHUB_PATH"
Comment on lines +79 to +82
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⚠️ Potential issue

Verify shellcheck binary after extraction.

The download and extraction should be verified to ensure we have a working shellcheck binary.

 curl -fsSL "https://github.com/koalaman/shellcheck/releases/download/${INPUT_VERSION}/shellcheck-${INPUT_VERSION}.${osvariant}.x86_64.tar.xz" | \
   tar -xz -C "${download_dir}" --strip-components 1 -- "shellcheck-${INPUT_VERSION}/shellcheck"

+if [ ! -x "${download_dir}/shellcheck" ]; then
+  echo "::error::Failed to download or extract shellcheck"
+  exit 1
+fi
+
 echo "${download_dir}" >> "$GITHUB_PATH"
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
curl -fsSL "https://github.com/koalaman/shellcheck/releases/download/${INPUT_VERSION}/shellcheck-${INPUT_VERSION}.${osvariant}.x86_64.tar.xz" | \
tar -xz -C "${download_dir}" --strip-components 1 -- "shellcheck-${INPUT_VERSION}/shellcheck"
tar -xf "${{ github.action_path }}/sc.tar.xz" -C "${{ github.action_path }}"
mv "${{ github.action_path }}/shellcheck-${INPUT_VERSION}/shellcheck" \
"${{ github.action_path }}/shellcheck"
echo "${download_dir}" >> "$GITHUB_PATH"
curl -fsSL "https://github.com/koalaman/shellcheck/releases/download/${INPUT_VERSION}/shellcheck-${INPUT_VERSION}.${osvariant}.x86_64.tar.xz" | \
tar -xz -C "${download_dir}" --strip-components 1 -- "shellcheck-${INPUT_VERSION}/shellcheck"
if [ ! -x "${download_dir}/shellcheck" ]; then
echo "::error::Failed to download or extract shellcheck"
exit 1
fi
echo "${download_dir}" >> "$GITHUB_PATH"


- name: Display shellcheck version
shell: bash
run: |
"${{ github.action_path }}/shellcheck" --version
shellcheck --version

- name: Set options
shell: bash
Expand Down Expand Up @@ -204,13 +208,11 @@ runs:
-print0)

if [[ -n "${INPUT_CHECK_TOGETHER}" ]]; then
"${{ github.action_path }}/shellcheck" \
${INPUT_SHELLCHECK_OPTIONS} \
shellcheck ${INPUT_SHELLCHECK_OPTIONS} \
"${filepaths[@]}" || statuscode=$?
else
for file in "${filepaths[@]}"; do
"${{ github.action_path }}/shellcheck" \
${INPUT_SHELLCHECK_OPTIONS} \
shellcheck ${INPUT_SHELLCHECK_OPTIONS} \
"$file" || statuscode=$?
done
fi
Expand Down