Fix gen-commands PATH resolution in GitHub Actions workflow

[Copilot]

The verify-generation job was failing because gen-commands installed via go install was not in PATH when make gen executed.

Changes

• Added Go setup: Both jobs now use actions/setup-go@v5 with go-version-file: 'go.mod' to ensure Go 1.25.3 is available
• Added PATH configuration: Append $HOME/go/bin to $GITHUB_PATH before running make gen so binaries installed by go install are discoverable
• Added explicit permissions: Both jobs now specify permissions: contents: read to follow least-privilege security practices

- name: Set up Go
  uses: actions/setup-go@v5
  with:
    go-version-file: 'go.mod'
- name: Add Go bin to PATH
  run: echo "$HOME/go/bin" >> $GITHUB_PATH
- name: Run commands generation command
  run: make gen

The Makefile's install target clones the temporal CLI repo and runs go install ./cmd/gen-commands, which installs to $GOPATH/bin (typically ~/go/bin). This directory is not in the default GitHub Actions runner PATH.

Original prompt

Problem

The GitHub Actions workflow is failing because gen-commands binary installed via go install is not found in the PATH. The failure occurs in the "Check Generated Files" workflow at this job: https://github.com/temporalio/cloud-cli/actions/runs/21757553412/job/62771977077

Error Log

2026-02-06T16:18:43.0870158Z gen-commands -input ./temporalcloudcli/commands.yml -pkg temporalcloudcli > ./temporalcloudcli/commands.gen.go
2026-02-06T16:18:43.0883189Z /bin/sh: 1: gen-commands: not found
2026-02-06T16:18:43.0883854Z make: *** [Makefile:20: gen] Error 127

Root Cause

The Makefile's install rule runs go install ./cmd/gen-commands which installs the binary to $GOPATH/bin (typically ~/go/bin), but this directory is not in the PATH for the GitHub Actions runner.

Solution

Add a step in the .github/workflows/build.yml file to add the Go bin directory to the GitHub Actions PATH before running make gen.

In the verify-generation job, add a new step after the checkout step:

- name: Add Go bin to PATH
  run: echo "$HOME/go/bin" >> $GITHUB_PATH

This step should be inserted between the "Checkout repository" step and the "Run commands generation command" step (between lines 15 and 16).

Files to Modify

• .github/workflows/build.yml - Add the new step to add Go bin to PATH in the verify-generation job

This pull request was created from Copilot chat.

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[semgrep-managed-scans]

No explicit GITHUB_TOKEN permissions found at the workflow or job level. Add a permissions: block at the workflow root (applies to all jobs) or per job with least privilege (e.g., contents: read and only specific writes like pull-requests: write if needed).

🥳 Fixed in commit ebd44de 🥳

[semgrep-managed-scans]

No explicit GITHUB_TOKEN permissions found at the workflow or job level. Add a permissions: block at the workflow root (applies to all jobs) or per job with least privilege (e.g., contents: read and only specific writes like pull-requests: write if needed).

🍰 Fixed in commit ebd44de 🍰