Error: "cut: -: bad delimiter" during "Validating input and generating pi-gen config" step

[claude[bot]]

Describe the bug

When using the action version v1.10.0, the build fails during the "Validating input and generating pi-gen config" step with the error:

cut: -: bad delimiter

To Reproduce

Using the following workflow configuration:

- name: Build image with pi-gen
  uses: usimd/[email protected]
  with:
    image-name: sumidas-os
    stage-list: ${{ github.event.inputs.stage_list || 'stage0 stage1' }}
    verbose-output: true
    enable-noobs: false
    increase-runner-disk-size: true
    compression: none

Root Cause

The issue appears to be in src/pi-gen-config.ts around line 117 where the cut command is used:

const cutCmd = await io.which('cut', true)
const supportedLocales = (
  await exec.getExecOutput(
    cutCmd,
    ['-d', ' ', '-f1', '/usr/share/i18n/SUPPORTED'],
    {silent: true}
  )
).stdout.split('\n')

The problem is that the delimiter -d ' ' (a space character) is being interpreted incorrectly in some environments, causing the "bad delimiter" error.

Environment

• Runner OS: Linux (GitHub Actions runner)
• Action version: v1.10.0

Expected behavior

The action should successfully validate the configuration and continue with the build process.

Possible Solution

The cut command might need to be called differently, perhaps:

• Using a different quoting mechanism for the space delimiter
• Using an alternative approach to parse the SUPPORTED file
• Using a different delimiter character if the file format allows

Workaround

Currently looking for a workaround. The issue prevents the action from proceeding past the validation stage.

[jedahan]

Could convert that function to pure JavaScript and not need to shell out.

[usimd]

Could switch to depending on s.th. like locale-code.