Enable detection of local path module updates when using Terragrunt

[Taiki130]

Check List

• Read CONTRIBUTING.md
  • Read OSS Contribution Guide
• Write a GitHub Issue before creating a Pull Request
  • Link to the issue: Support for updating local modules when using Terragrunt #2145
• All commits are signed
  • This repository enables Require signed commits, so all commits must be signed
• Avoid force push
• Do only one thing in one Pull Request

Description

• Implemented functionality to detect updates in modules referenced via Terragrunt's local path modules using the terragrunt render-json command.
  • This command is used to render the fully interpreted terragrunt.hcl file into JSON, allowing the detection of module changes effectively.
    • https://terragrunt.gruntwork.io/docs/reference/cli-options/#render-json
  • Since whether Terragrunt is used depends on the target, the logic checks for the presence of a terragrunt.hcl file to determine if Terragrunt is being utilized.

[suzuki-shunsuke]

Thank you for your contribution!

[github-actions]

🚀 Pull Request Branch was created or updated

Build link

The pull request branch pr/2196 was created or updated.

You can try this pull request in your workflows by changing version to pr/2196.

[suzuki-shunsuke]

I added tests in CI.
Unfortunately, tests are skipped in prs from fork for now, but I confirmed tests passed.

• Test terragrunt local module #2202
• https://github.com/suzuki-shunsuke/tfaction/actions/runs/12580034636/job/35061276375?pr=2202#step:9:39