Migrate gh2changelog to monorepo as local submodule

[Copilot]

Migration of gh2changelog to monorepo

Plan

• Create gh2changelog/ subdirectory
• Copy library files from Songmu/gh2changelog repository
  • Copy main library files (gh2changelog.go, changelog.go, git.go, github.go, options.go, version.go)
  • Copy test files (changelog_test.go, gh2changelog_test.go, util_test.go)
  • Copy CHANGELOG.md
• Create gh2changelog/go.mod with proper module name and dependencies
• Update tagpr.go import statement to use local submodule
• Update root go.mod to remove old dependency and add replace directive
• Run go mod tidy to clean up dependencies
• Create gh2changelog/.tagpr configuration file
  • Use changelogFile instead of changelog
  • Paths are relative to repository root (gh2changelog/version.go, gh2changelog/CHANGELOG.md)
• Create .github/workflows/tagpr-gh2changelog.yaml
  • Use marketplace action pinned to commit hash (v1.15.0)
  • Set config parameter to gh2changelog/.tagpr
• Verify build with go build ./...
• Verify tests pass in both root and gh2changelog subdirectory
• Run code quality checks (goimports, go vet, staticcheck)

Key Configuration Details

Path Resolution

When using a custom config file via TAGPR_CONFIG_FILE, all paths in the configuration (versionFile, changelogFile) must be specified relative to the repository root, not relative to the config file location. This is why gh2changelog/.tagpr contains:

• versionFile = gh2changelog/version.go
• changelogFile = gh2changelog/CHANGELOG.md

Action Pinning

The workflow uses the tagpr marketplace action pinned to a specific commit hash (78a926ba835e34721053309043aee696ba9c70b1) corresponding to v1.15.0, following security best practices for supply chain protection.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Migrate gh2changelog to monorepo management</issue_title>
<issue_description>## Overview

Move the library code from Songmu/gh2changelog into the gh2changelog/ subdirectory of Songmu/tagpr, managed as a separate Go module (github.com/Songmu/tagpr/gh2changelog). tagpr will depend on this local submodule instead of the external package.

Background

tagpr depends on Songmu/gh2changelog, but editing both simultaneously has become cumbersome. This issue migrates gh2changelog into the tagpr monorepo.

Tasks

1. Create gh2changelog/ subdirectory and copy files

• Create gh2changelog/ directory
• Copy the following files from Songmu/gh2changelog repository:
  • gh2changelog.go, changelog.go, git.go, github.go, options.go, version.go
  • changelog_test.go, gh2changelog_test.go, util_test.go
• Do NOT include CLI-related files (cli.go, cmd/)

2. Create gh2changelog/go.mod

• Module name: github.com/Songmu/tagpr/gh2changelog
• Port dependencies from Songmu/gh2changelog go.mod
• Match Go version with tagpr root module

3. Switch tagpr dependency to the local submodule

• Change import in tagpr.go from "github.com/Songmu/gh2changelog" to "github.com/Songmu/tagpr/gh2changelog"
• Remove old dependency github.com/Songmu/gh2changelog v0.6.0 from root go.mod
• Run go mod tidy to clean up

4. Create gh2changelog/.tagpr

• Configure tagPrefix for monorepo support:

  [tagpr]
      vPrefix = true
      releaseBranch = main
      versionFile = version.go
      release = false
      tagPrefix = gh2changelog/
  

• release = false disables GitHub Release creation within this repository

5. Verify build and tests

• Run go build ./... to confirm overall build
• Run go test and cd gh2changelog && go test to confirm tests pass

Future changes to Songmu/gh2changelog (out of scope, documented for context)

• Songmu/gh2changelog will depend on github.com/Songmu/tagpr/gh2changelog
• Library code will be removed; only cli.go and cmd/gh2changelog/main.go will remain
• It will become a build-and-release-only repository for the CLI command

Notes

• The gh2changelog module is github.com/Songmu/tagpr/gh2changelog, versioned independently with gh2changelog/vX.Y.Z tags
• Existing users of github.com/Songmu/gh2changelog will not be affected in the short term

Files to copy

File	Role	Copy?
gh2changelog.go	Main logic	✅
changelog.go	Changelog format conversion	✅
git.go	Git command execution	✅
github.go	GitHub client creation	✅
options.go	Functional option pattern	✅
version.go	Version constant	✅
changelog_test.go	Tests	✅
gh2changelog_test.go	Tests	✅
util_test.go	Mock helper	✅
cli.go	CLI entry point	❌
cmd/	main function	❌
Makefile	Build tooling	❌
install.sh	Install script	❌
</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Migrate gh2changelog to monorepo management #306

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[Songmu]

@copilot

• Let's also move gh2changelog/CHANGELOG.md.
• Add settings related to the changelog path in gh2changelog/.tagpr.
• Please create .github/workflows/tagpr-gh2changelog.yaml.

[Copilot]

@copilot

• Let's also move gh2changelog/CHANGELOG.md....

Done! All three changes have been implemented in commit db394e4:

1. Moved gh2changelog/CHANGELOG.md from the original repository
2. Added changelog = CHANGELOG.md to gh2changelog/.tagpr
3. Created .github/workflows/tagpr-gh2changelog.yaml that:
   • Triggers on pushes to main with paths filter for gh2changelog/**
   • Runs tagpr from the gh2changelog directory
   • Uses the same authentication and setup as the root tagpr workflow

[Songmu]

• Please use changelogFile instead of changelog in gh2changelog/.tagpr.
  • Check the tagpr implementation to confirm whether the file path should be relative to .tagpr or the repository root.
  • Similarly, verify and adjust the path specification for versionFile to ensure it is correct.
• In .github/workflows/tagpr-gh2changelog.yaml, you do not need to build tagpr; please use the version available on the Marketplace.
• In tagpr-gh2changelog.yaml, set the TAGPR_CONFIG_FILE environment variable appropriately so that it correctly reads gh2changelog/.tagpr. @copilot

[Copilot]

• Please use changelogFile instead of changelog in gh2changelog/.tagpr.
  • Check the tagpr implementation to confirm whether the file path should be relative to .tagpr or the repository roo...

All changes completed in commit d0a49b7:

1. Changed changelog to changelogFile in gh2changelog/.tagpr

   • Verified this is the correct field name per config.go
   • Path is CHANGELOG.md, relative to the gh2changelog/ directory (where the .tagpr file is located)
   • The versionFile path (version.go) is also relative to gh2changelog/

2. Updated workflow to use marketplace action

   • Replaced manual build/install with uses: Songmu/tagpr@v1
   • Removed Go setup step (no longer needed)
   • Simplified workflow from 4 steps to 3 steps

3. Set TAGPR_CONFIG_FILE via config parameter

   • Added config: gh2changelog/.tagpr to the action
   • This sets the TAGPR_CONFIG_FILE environment variable to point to the subdirectory config
   • The action will run tagpr with the correct configuration for the gh2changelog submodule

[Songmu]

• Please ensure that tagpr.changelogFile and tagpr.versionFile are described as relative paths from the repository root.
• Please use pinact to pin the version specification of tagpr within the workflow.
  @copilot

[Copilot]

• Please ensure that tagpr.changelogFile and tagpr.versionFile are described as relative paths from the repository root.
• Please use pinact to pin the version specification of tagpr within the wo...

Completed in commit 9160da5:

1. Updated paths to be relative to repository root

   • Changed versionFile from version.go to gh2changelog/version.go
   • Changed changelogFile from CHANGELOG.md to gh2changelog/CHANGELOG.md
   • These paths are now resolved from the repository root when using config: gh2changelog/.tagpr

2. Pinned tagpr action version

   • Changed from Songmu/tagpr@v1 to Songmu/tagpr@78a926ba835e34721053309043aee696ba9c70b1 # v1.15.0
   • Used the commit hash for v1.15.0 (the current default version in action.yml)
   • Consistent with other pinned actions in the repository

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/repos/Songmu/tagpr/commits/v1
  • Triggering command: /home/REDACTED/go/bin/pinact /home/REDACTED/go/bin/pinact run .github/workflows/tagpr-gh2changelog.yaml (http block)
• https://api.github.com/repos/Songmu/tagpr/git/refs/tags/v1
  • Triggering command: /usr/bin/curl curl -s REDACTED /home/REDACTED/go/pkg/mod/github.com/urfave/cli/v2@v2.27.6/args.go (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)