• Define input parameters with spec:inputs
• Set input parameter values with include:inputs
  • Use include:inputs with multiple files
  • Include the same file multiple times
• Specify functions to manipulate input values
  • Predefined interpolation functions
    • expand_vars
    • truncate

Define inputs for configuration added with include

Define input parameters with spec:inputs

Use spec:inputs to define input parameters for CI/CD configuration intended to be added to a pipeline with include. Use include:inputs to define the values to use when the pipeline runs.

The specs must be declared at the top of the configuration file, in a header section. Separate the header from the rest of the configuration with ---.

Use the interpolation format $[[ input.input-id ]] to reference the values outside of the header section. The inputs are evaluated and interpolated once, when the configuration is fetched during pipeline creation, but before the configuration is merged with the contents of the .gitlab-ci.yml.

spec:
  inputs:
    environment:
    job-stage:
---

scan-website:
  stage: $[[ inputs.job-stage ]]
  script: ./scan-website $[[ inputs.environment ]]

When using spec:inputs:

• Defined inputs are mandatory by default.
• Inputs can be made optional by specifying a default. Use default: null to have no default value.
• You can optionally use description to give a description to a specific input.
• A string containing an interpolation block must not exceed 1 MB.
• The string inside an interpolation block must not exceed 1 KB.

For example, a custom_configuration.yml:

spec:
  inputs:
    website:
    user:
      default: 'test-user'
    flags:
      default: null
      description: 'Sample description of the `flags` input detail.'
---

# The pipeline configuration would follow...

In this example:

• website is mandatory and must be defined.
• user is optional. If not defined, the value is test-user.
• flags is optional. If not defined, it has no value. The optional description should give details about the input.

Set input parameter values with include:inputs

Use include:inputs to set the values for the parameters when the included configuration is added to the pipeline.

For example, to include a custom_configuration.yml that has the same specs as the example above:

include:
  - local: 'custom_configuration.yml'
    inputs:
      website: "My website"

In this example:

• website has a value of My website for the included configuration.

Use include:inputs with multiple files

inputs must be specified separately for each included file. For example:

include:
  - component: gitlab.com/org/my-component@1.0
    inputs:
      stage: my-stage
  - local: path/to/file.yml
    inputs:
      stage: my-stage

Include the same file multiple times

You can include the same file multiple times, with different inputs. However, if multiple jobs with the same name are added to one pipeline, each additional job overwrites the previous job with the same name. You must ensure the configuration prevents duplicate job names.

For example, including the same configuration multiple times with different inputs:

include:
  - local: path/to/my-super-linter.yml
    inputs:
      type: docs
      lint-path: "doc/"
  - local: path/to/my-super-linter.yml
    inputs:
      type: yaml
      lint-path: "data/yaml/"

The configuration in path/to/my-super-linter.yml ensures the job has a unique name each time it is included:

spec:
  inputs:
    type:
    lint-path:
---
"run-$[[ inputs.type ]]-lint":
  script: ./lint --$[[ inputs.type ]] --path=$[[ inputs.lint-path ]]

Specify functions to manipulate input values

You can specify predefined functions in the interpolation block to manipulate the input value. The format supported is the following:

$[[ input.input-id | <function1> | <function2> | ... <functionN> ]]

Details:

• Only predefined interpolation functions are permitted.
• A maximum of 3 functions may be specified in a single interpolation block.
• The functions are executed in the sequence they are specified.

spec:
  inputs:
    test:
      default: 'test $MY_VAR'
---

test-job:
  script: echo $[[ inputs.test | expand_vars | truncate(5,8) ]]

In this example, assuming the input uses the default value and $MY_VAR is an unmasked project variable with value my value:

1. First, the function expand_vars expands the value to test my value.
2. Then truncate applies to test my value with a character offset of 5 and length 8.
3. The output of script would be echo my value.

Predefined interpolation functions

expand_vars

Use expand_vars to expand CI/CD variables in the input value.

Only variables you can use with the include keyword and which are not masked can be expanded. Nested variable expansion is not supported.

Example:

$[[ inputs.test | expand_vars ]]

Assuming the value of inputs.test is test $MY_VAR, and the variable $MY_VAR is unmasked with a value of my value, then the output would be test my value.

truncate

Use truncate to shorten the interpolated value. For example:

• truncate(<offset>,<length>)

Example:

$[[ inputs.test | truncate(3,5) ]]

Assuming the value of inputs.test is 0123456789, then the output would be 34567.