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Custom Analysis Configuration

You don't need to do any special configuration for Sider to start analyzing your code. However, Sider also offers advanced settings for special cases via the sider.yml file.

sideci.yml is still supported for the backward compatibility, but Sider recognizes sider.yml if both exist.

Configuration via sider.yml

First, add a file named sider.yml in your project's root directory.

linter:
  rubocop:
    config: "lint_yml/.myrubocop.yml"

  eslint:
    root_dir: "frontend"
    npm_install: false
    config: "frontend/.eslintrc"
    ext: "js,jsx"

  stylelint:
    root_dir: "app/assets/stylesheets"
    glob: "**/*.{css,scss}"

The options you can specify in sider.yml are grouped into two categories:

  1. Analyzer specific options
  2. Common options available to all analyzers

Currently, root_dir is the only common option.

Analysis tool specific configuration

You can use sider.yml to configure each analyzer's vendor-supplied settings. Sider also provides extra options for some analyzers that configure how Sider runs the analyzer (for example, some tools might need to run npm install before beginning analysis). The tools documentation has more information about which options are available for each tool.

root_dir option

Type: string

This is a common option available to all analyzers. This option specifies a directory in your repository from which Sider should run the analyzer in. For example, if you have all your JavaScript files in the ./frontend directory, you could configure sider.yml like this:

linter:
  eslint:
    root_dir: "frontend"

Sider will run ESLint analysis in ./frontend directory.

gems option

Type: string[], hash[]

Some analyzers written in Ruby can be customized with third-party gems. With Sider, you can use Bundler to install any gem. The following is an example of installing RuboCop plugins or configuration gems:

linter:
  rubocop:
    gems:
      - name: "meowcop"
        version: "1.17.0"

You can also set the version of the analyzer you want to use. However, the version must meet Sider's constraints. Please refer to each analyzer page.

linter:
  rubocop:
    gems:
      - name: "rubocop"
        version: "0.66.0"

Understanding the analyzer version

Sider decides the analyzer version in the following order:

  1. gems option in sider.yml
  2. Gemfile.lock
  3. The default version

However, if the version written in Gemfile.lock does not satisfy our constraints, that version is skipped.

Install gems from Gemfile.lock

If you want to additionally install a specific gem written in Gemfile.lock, you can omit the version as follows:

linter:
  rubocop:
    gems:
      - "rubocop-rspec"

If the gem is not found in Gemfile.lock, the latest version is installed.

Install gems from third-party RubyGems repository

You can select an alternate RubyGems repository as a gem source via the source option:

linter:
  rubocop:
    gems:
      - name: "rubocop-mycompany"
        version: "0.63.0"
        source: "https://gems.mycompany.com"

Install gems from git repositories

You can also install a gem in a git repository. Please note that the git option cannot be specified with version or source.

linter:
  rubocop:
    gems:
      - name: "rubocop-mycompany-standard"
        git:
          repo: "https://github.com/mycompany/rubocop-mycompany-standard.git"
          branch: "master"
      - name: "rubocop-mycompany-extensions"
        git:
          repo: "git@github.com/mycomapny/rubocop-mycompany-extensions.git"
          tag: "v0.63.0"

git option has options below:

NameTypeDescription
repostringGit repository location. The repository can be accessed via HTTP(S)/SSH protocols.
branchstringBranch name.
tagstringTag name.
refstringRef name.

If you would like to install a gem located in a private git repository, see private dependencies guide and configure SSH key.

npm_install option

Type: boolean, string

For npm-published analyzers such as ESLint or stylelint, you can use the npm_install option to configure the behavior of npm dependencies installation. This option has the following values:

ValueDescription
true (default)Install dependencies via npm or Yarn.
falseDo not install any dependencies.
"production"Install only dependencies for production.
"development"Install only dependencies for development.
OthersFail analysis.

For example:

linter:
  eslint:
    npm_install: "development"
  stylelint:
    npm_install: false

When the npm_install option is not false, Sider will try as follows:

  1. Check if package.json exists. If not present, Sider uses the default version of the analyzers.
  2. If package.json and yarn.lock exist, Sider runs the yarn install command.
  3. If package.json and package-lock.json exist, Sider runs the npm ci command.
  4. If package.json exists but none of yarn.lock and package-lock.json exist, Sider runs the npm install command.
  5. Checks if the analyzer is installed in the node_modules directory.
  6. If installed, Sider uses the installed version.
  7. If not installed (for any reason), Sider uses the pre-installed default version.
    • In this case, Sider shows warnings.

When the option is false, Sider will skip these installation steps and analyze with the pre-installed default version. You might want to set the option to false if you don't configure analyzer and don't want to see warnings.

ignore option

Type: string[]

This option allows you to ignore specific files. It helps to improve the analysis execution time and the analysis stability. The format of each ignore item follows gitignore(5).

In order to use this option, add it as a top-level in sider.yml like this:

ignore:
  - "*.pdf"
  - "*.mp4"
  - "images/**"

branches.exclude option

Type: string[]

This option allows you to exclude branches from the analysis. If there are branches that are unnecessary for your team to analyze, use the branches option. When setting this option, Sider will not analyze the branch specified in this option.

In order to use this option, add it as a top-level in sider.yml like this:

branches:
  exclude:
    - master
    - development
    - another_branch

With the above setting, Sider will ignore master, development and another_branch branches when these branches(pull requests) are updated or opened. That is, even if these branches have any changes, Sider will not send commit status and not review them.

If Sider is enabled to make status checks required on GitHub, you cannot merge a branch because Sider will not send the commit status to GitHub. In this case, you need to disable the check status setting on your GitHub repository page.

If you want to know more details about this GitHub setting, read the GitHub documentation; About required status checks and Enabling required status check.

You can also use regular expressions as the exclude pattern:

branches:
  exclude:
    - /^release-.*$/
    - /^dependabot/

In the above example, all branches such as release-20190304 or dependabot/bundler/aws-partitions-1.202.0 are ignored.

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