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Codemagic Workflow

First, make sure you app is added and enabled in Codemagic CI/CD by integrating with your repository.

Then, you have two options to write your steps for the build pipeline in Codemagic, either use the "Workflow Editor" or you can switch to codemagic.yaml file.

|---lib
|---analysis_options.yaml
|---pubspec.yaml
|---codemagic.yaml

In this doc, we will cover both modes.

Configuring Access to DCM Step

First, you need to define environment variables, DCM_EMAIL and DCM_KEY.

Setup Environment Variables

codemagic.yaml

In Codemagic, you can navigate to your app settings, then to the Environment variables tab and then add both variables. Then, group the variables under dcm_credentials and make sure the Secure option is enabled.

environment:
  groups:
    - dcm_credentials

Workflow Editor

In this mode, you can go to "Environment Variable" step and define your secure variables.

Installing DCM Step

Codemagic can have different build machine including macOS, Linux and Windows.

To install the the DCM on Codemagic, depending on the build machine that you are using, follow the installation step.

For example, for macOS build machines,

you can use brew as below right before all other steps. Ensure that you also install flutter pub packages.

codemagic.yaml

scripts:
  - name: Install DCM
    script: |
      brew tap CQLabs/dcm
      export HOMEBREW_NO_AUTO_UPDATE=1
      brew install dcm
  - name: Install flutter packages
    script: flutter pub get
  - name: Confirm DCM
    script: dcm --version

Workflow Editor

#!/bin/sh
set -e
set -x 
brew tap CQLabs/dcm
export HOMEBREW_NO_AUTO_UPDATE=1
brew install dcm
flutter pub get
dcm --version

You can add this script between "dependencies cache" and "tests" steps.

Read more about different DCM installation on Windows, macOS and Linux.

Run DCM Step

It's up to you when to run DCM analyze command to generate the code quality report whether pre-test or post-test or pre-build, however, we recommend you run and generate report as early as possible as it is good idea to run quick steps before slower steps to save up CI/CD minutes and get faster feedback on CI. Therefore, we will add "Run DCM Analysis" right after all dependencies are set and before every other steps.

codemagic.yaml

  - name: Running DCM Analysis...
    script: dcm analyze --ci-key=$DCM_KEY --email=$DCM_EMAIL lib --reporter=console

Workflow Editor

You can use the following script in the pre-test step. The earlier you have the analyze in the CI steps, the better, it helps you to fail the steps without going through the entire CI workflow steps.

#!/bin/sh
set -e
echo "Running DCM Analysis..."
dcm analyze --ci-key=$DCM_KEY --email=$DCM_EMAIL lib --reporter=console

After this setup and combing with your own steps, you are ready to start building and testing.

DCM Report Artifacts

In case you need to download the DCM report from Codemagic, you can generate preferable format for example Markdown, JSON or XML and download if needed.

codemagic.yaml

You can do that with codemagic.yaml as follow:

      - name: Running DCM Analysis
        script: |
            echo "Running DCM Analysis..."

            # Run DCM analysis, capture exit code and error message
            DCM_OUTPUT=$(dcm analyze --ci-key=$DCM_KEY --email=$DCM_EMAIL lib --no-congratulate --reporter=console 2>&1)
            DCM_EXIT_CODE=$?

            # If analysis fails, create an error summary
            if [ "$DCM_EXIT_CODE" -ne 0 ]; then
              echo "DCM Analysis failed with exit code $DCM_EXIT_CODE."
              echo "Error Message: $DCM_OUTPUT"

              # Write error summary to a markdown file
              cat <<EOF > dcm_error_summary.md
            # DCM Analysis Failed

            DCM Analysis failed with exit code $DCM_EXIT_CODE.

            ## Error Message
            \`\`\`
            $DCM_OUTPUT
            \`\`\`
            EOF

              # Copy the error summary to the export directory
              cp dcm_error_summary.md "$CM_EXPORT_DIR/dcm_error_summary.md"

              # Exit the script with the DCM exit code to mark the CI/CD step as failed
              exit $DCM_EXIT_CODE
            fi

      # Optionally add test scripts here if needed, for example:
      - name: Run Flutter Tests
        script: flutter test

    artifacts:
      - dcm_error_summary.md  # Collect any error summary if generated

Workflow Editor

You can change your pre-test script to the following:

#!/bin/sh
set -e
echo "Running DCM Analysis..."
# Run DCM analysis, capture exit code and error message
DCM_OUTPUT=$(dcm analyze --ci-key=$DCM_KEY --email=$DCM_EMAIL lib --no-congratulate --reporter=console 2>&1)
DCM_EXIT_CODE=$?

# If analysis fails, create an error summary
if [ "$DCM_EXIT_CODE" -ne 0 ]; then
  echo "DCM Analysis failed with exit code $DCM_EXIT_CODE."
  echo "Error Message: $DCM_OUTPUT"

  # Write error summary to a markdown file
  cat <<EOF > dcm_error_summary.md
  # DCM Analysis Failed

  DCM Analysis failed with exit code $DCM_EXIT_CODE.

  ## Error Message
  \`\`\`
  $DCM_OUTPUT
  \`\`\`
  EOF

  # Copy the error summary to the export directory
  cp dcm_error_summary.md "$CM_EXPORT_DIR/dcm_error_summary.md"

  # Exit the script with the DCM exit code to mark the CI/CD step as failed
  exit $DCM_EXIT_CODE
fi

Full Script

Here is the final steps and script for codemagic.yaml file.

workflows:
  flutter-workflow:
    name: Flutter Code Quality
    triggering:
      events:
        - push
    environment:
      flutter: stable
      groups:
        - dcm_credentials
    scripts:
      - name: Install DCM
        script: |
          brew tap CQLabs/dcm
          export HOMEBREW_NO_AUTO_UPDATE=1
          brew install dcm
      - name: Flutter packages
        script: |
          flutter pub get
      - name: DCM verify
        script: |
          dcm --version          
      - name: Running DCM Analysis
        script: >
          echo "Running DCM Analysis..."

          # Run DCM analysis, capture exit code and error message

          DCM_OUTPUT=$(dcm analyze --ci-key=$DCM_KEY --email=$DCM_EMAIL lib --no-congratulate
          --reporter=console 2>&1)

          DCM_EXIT_CODE=$?


          # If analysis fails, create an error summary

          if [ "$DCM_EXIT_CODE" -ne 0 ]; then
            echo "DCM Analysis failed with exit code $DCM_EXIT_CODE."
            echo "Error Message: $DCM_OUTPUT"

            # Write error summary to a markdown file
            cat <<EOF > dcm_error_summary.md
          # DCM Analysis Failed


          DCM Analysis failed with exit code $DCM_EXIT_CODE.


          ## Error Message

          \`\`\`

          $DCM_OUTPUT

          \`\`\`

          EOF

            # Copy the error summary to the export directory
            cp dcm_error_summary.md "$CM_EXPORT_DIR/dcm_error_summary.md"
            
            # Exit the script with the DCM exit code to mark the CI/CD step as failed
            exit $DCM_EXIT_CODE
          fi
      - name: Run Flutter Tests
        script: flutter test
    artifacts:
      - dcm_error_summary.md

1. Executes dcm analyze and captures both the exit code and error message.
2. If the analysis fails (DCM_EXIT_CODE is non-zero), the script:
   • Outputs the error to the console.
   • Writes the error details to dcm_error_summary.md in Markdown format.
3. The dcm_error_summary.md file is added to the artifacts section, so Codemagic will include it in the build artifacts if it’s generated. The key step here is to copy the generated file into $CM_EXPORT_DIR.