feat(github): add rename_exe option and switch elm, opam, yt-dlp from ubi

[jdx]

Summary

• Add rename_exe option to github backend that renames binaries after archive extraction
• Switch elm from ubi to github backend (uses existing bin option)
• Switch opam from ubi to github backend (uses asset_pattern to select platform binary)
• Switch yt-dlp from ubi to github backend (uses new rename_exe option)

This completes the migration of the last 3 tools that were using ubi as their primary backend, consolidating on the github backend.

Changes

New Feature

• rename_exe option in install_artifact() renames the first executable found in an extracted archive

Registry Updates

• elm: ubi:elm/compiler[exe=elm] → github:elm/compiler[bin=elm]
• opam: ubi:ocaml/opam → github:ocaml/opam[asset_pattern=opam-*-*-{os}]
• yt-dlp: ubi:yt-dlp/yt-dlp[rename_exe=yt-dlp] → github:yt-dlp/yt-dlp[rename_exe=yt-dlp]

Test plan

• Tested elm installation: mise install [email protected] → elm --version returns 0.19.1
• Tested opam installation: mise install [email protected] → opam --version returns 2.5.0
• Tested yt-dlp installation: mise install [email protected] → binary correctly renamed from yt-dlp_macos to yt-dlp

🤖 Generated with Claude Code

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Note

Adds archive binary renaming and GNU arch templating to the GitHub backend, and switches elm, opam, and yt-dlp from ubi to github.

• Backend (GitHub):
  • Add rename_exe option to rename the first executable after archive extraction (install_artifact), with helper rename_executable_in_dir.
  • Add {gnu_arch} template alias for asset patterns (e.g., x64 -> x86_64) in pattern templating.
• Registry:
  • tools.elm: ubi:elm/compiler[exe=elm] → github:elm/compiler[bin=elm].
  • tools.opam: ubi:ocaml/opam → github:ocaml/opam[asset_pattern=opam-*-{gnu_arch}-{os}].
  • tools.yt-dlp: ubi:yt-dlp/yt-dlp → github:yt-dlp/yt-dlp[rename_exe=yt-dlp].
• Docs:
  • Document new rename_exe option with example and guidance in docs/dev-tools/backends/github.md.

^{Written by Cursor Bugbot for commit 78628f4. This will update automatically on new commits. Configure here.}

[Copilot]

Pull request overview

This PR migrates the last three tools (elm, opam, yt-dlp) from the ubi backend to the github backend and adds a new rename_exe option to support platform-specific binary renaming after archive extraction.

• Implements rename_exe option in the github backend's install_artifact() function
• Switches elm, opam, and yt-dlp from ubi to github backend with appropriate configuration options
• Consolidates all tools on the github backend, eliminating ubi dependencies

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
src/backend/static_helpers.rs	Adds rename_executable_in_dir() function and integrates rename_exe option into install_artifact()
registry.toml	Updates backend configurations for elm, opam, and yt-dlp tools

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[Copilot]

Using unwrap() on file_name() will panic if the path terminates in ... Consider using ok_or_else() with a descriptive error instead to handle this edge case gracefully.

Suggested change

	let file_name = path.file_name().unwrap().to_string_lossy();
	let file_name = path
	.file_name()
	.ok_or_else(|| eyre::eyre!("Path '{}' has no file name", path.display()))?
	.to_string_lossy();

[Copilot]

Using flatten() silently ignores read errors for individual directory entries. Consider handling these errors explicitly or logging them to avoid silently skipping files that fail to read.

[Copilot]

The function returns Ok(()) when no executable is found, which silently ignores the case where rename_exe was specified but no suitable executable exists. This should return an error to alert users that the rename operation failed.

Suggested change

	Ok(())
	bail!(
	"No executable file found in directory '{}' to rename to '{}'",
	dir.display(),
	new_name
	);

[github-actions]

Hyperfine Performance

mise x -- echo

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.11.10 x -- echo	20.1 ± 0.9	19.2	29.7	1.02 ± 0.06
mise x -- echo	19.8 ± 0.7	18.7	26.9	1.00

mise env

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.11.10 env	19.4 ± 0.4	18.6	21.6	1.00
mise env	19.5 ± 2.6	18.4	76.0	1.00 ± 0.14

mise hook-env

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.11.10 hook-env	19.3 ± 0.3	18.8	20.5	1.00 ± 0.03
mise hook-env	19.3 ± 0.6	18.3	21.0	1.00

mise ls

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.11.10 ls	17.3 ± 0.7	16.5	28.1	1.05 ± 0.05
mise ls	16.5 ± 0.3	15.9	19.4	1.00

xtasks/test/perf

Command	mise-2025.11.10	mise	Variance
install (cached)	109ms	109ms	+0%
ls (cached)	67ms	67ms	+0%
bin-paths (cached)	74ms	75ms	-1%
task-ls (cached)	425ms	439ms	-3%