[jdx]

https://entire.com/gh/jdx/mise/trails/972

Fixes #14846

gem: tools (and later bundle install) failed with Errno::ENOENT: No such file or directory - mise when mise wasn't on PATH, e.g. with the --localize install-script wrapper in CI. The rubygems plugin mise writes into each ruby shells out to mise reshim after every install, and that backtick call raised.

Now the plugin rescues the error and logs it under MISE_DEBUG, so the gem install succeeds. Reshimming is only a convenience for shim users. Rubies installed before this change pick it up on reinstall, since the plugin is written at ruby install time.

env -i PATH=<ruby>/bin ruby -e 'load "rubygems_plugin.rb"; ReshimInstaller.reshim'  # no longer raises

AI-assisted — Tool: Claude Code; model: anthropic/claude-sonnet-5-5; version: unavailable.

🤖 Generated with Claude Code

---

Note

Low Risk
Narrows failure to a debug log when optional post-install reshimming cannot run; no change to gem install or auth/data paths.

Overview
Fixes gem/bundle installs failing when mise is not on PATH (e.g. localized CI wrappers): the Rubygems plugin’s post-install mise reshim shell-out no longer raises SystemCallError / Errno::ENOENT.

ReshimInstaller.reshim now wraps the backtick call in begin/rescue, logs a skip under MISE_DEBUG, and lets the install finish—reshimming stays optional for shim users only.

^{Reviewed by Cursor Bugbot for commit 339337c. Bugbot is set up for automated code reviews on this repo. Configure here.}

Summary by CodeRabbit

• Bug Fixes
  • Gem installations can now continue when refreshing tool shims encounters a system-level error. The skipped refresh is logged, while other types of errors continue to follow the existing behavior. This helps prevent a shim refresh issue from interrupting an otherwise successful gem installation.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

• Source mode: Auto
• Repository: jdx/mise
• Branch: claude/github-issue-14846-d1609f
• File: .coderabbit.yaml
• Commit: bbce9db
• Layers: Repository YAML (base), Central YAML (inherited), Organization UI (inherited)
• Review profile: CHILL
• Plan: Advanced
• Run ID: 1d098328-cec8-4d35-bdff-0e70d6123f55

📥 Commits

Reviewing files that changed from the base of the PR and between 48e837e and bbce9db.

📒 Files selected for processing: 1

• src/plugins/core/assets/rubygems_plugin.rb

Included review availability: This review used your included allowance. Your plan provides up to 10 included reviews per hour; 9 remain after this review.

📝 Walkthrough

The RubyGems plugin now rescues SystemCallError raised by mise reshim and logs that reshimming was skipped. The gem-install flow can continue after this error.

Changes: RubyGems reshimming

Layer / File(s)	Summary
Reshim error handling src/plugins/core/assets/rubygems_plugin.rb	reshim rescues SystemCallError and logs that reshimming was skipped.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~5 minutes

Change: Bug fix · Severity of issue fixed: Medium

Possibly related issues

Merge Risk: ⚪ Minimal · up to bbce9

The intended gem-install failure is addressed, with no actionable merge-blocking risk identified.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: gem installs no longer fail when mise is not on PATH.
Linked Issues check		Issue #14846 requires gem: and bundle install flows to succeed when mise is not on PATH. The change in src/plugins/core/assets/rubygems_plugin.rb rescues SystemCallError, including `Errno:…
Out of Scope Changes check		The change is limited to error handling for the optional post-install mise reshim call in src/plugins/core/assets/rubygems_plugin.rb. This directly supports issue #14846. No unrelated install, aut…

Full details: Linked Issues check

Explanation

Issue #14846 requires gem: and bundle install flows to succeed when mise is not on PATH. The change in src/plugins/core/assets/rubygems_plugin.rb rescues SystemCallError, including Errno::ENOENT, from mise reshim. It logs the skipped reshim under debug logging and allows the install hook to continue. The issue states that non-fatal reshim handling is an acceptable fix. No additional coding requirement is specified.

Full details: Out of Scope Changes check

Explanation

The change is limited to error handling for the optional post-install mise reshim call in src/plugins/core/assets/rubygems_plugin.rb. This directly supports issue #14846. No unrelated install, authentication, or data-path changes are shown.

• Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

Warning

Some tools did not complete. Review the errors below.

🔧 RuboCop (1.91.0)

src/plugins/core/assets/rubygems_plugin.rb

invalid byte sequence in US-ASCII
/usr/local/lib/ruby/gems/3.4.0/gems/rubocop-1.91.0/lib/rubocop/target_ruby.rb:181:in 'Regexp#match'
/usr/local/lib/ruby/gems/3.4.0/gems/rubocop-1.91.0/lib/rubocop/target_ruby.rb:181:in 'String#match'
/usr/local/lib/ruby/gems/3.4.0/gems/rubocop-1.91.0/lib/rubocop/target_ruby.rb:181:in 'RuboCop::TargetRuby::RubyVersionFile#find_version'
/usr/local/lib/ruby/gems/3.4.0/gems/rubocop-1.91.0/lib/rubocop/target_ruby.rb:31:in 'RuboCop::TargetRuby::Source#initialize'
/usr/local/lib/ruby/gems/3.4.0/gems/rubocop-1.91.0/lib/rubocop/target_ruby.rb:295:in 'Class#new'
/usr/local/lib/ruby/gems/3.4.0/gems/rubocop-1.91.0/lib/rubocop/target_ruby.rb:295:in 'block in RuboCop::TargetRuby#source'
/usr/local/lib/ruby/gems/3.4.0/gems/rubocop-1.91.0/lib/rubocop/target_ruby.rb:295:in 'Array#each'
/usr/local/lib/ruby/gems/3.4.0/gems/rubocop-1.91.0/lib/rubocop/target_ruby.rb:295:in 'Enumerator#each'
/usr/local/lib/ruby/gems/3.4.0/gems/rubocop-1.91.0/lib/rubocop/target_ruby.rb:295:i

... [truncated 2433 characters] ...

ems/3.4.0/gems/rubocop-1.91.0/lib/rubocop/config_store.rb:29:in 'RuboCop::ConfigStore#apply_options!'
/usr/local/lib/ruby/gems/3.4.0/gems/rubocop-1.91.0/lib/rubocop/cli.rb:167:in 'RuboCop::CLI#act_on_options'
/usr/local/lib/ruby/gems/3.4.0/gems/rubocop-1.91.0/lib/rubocop/cli.rb:49:in 'block in RuboCop::CLI#run'
/usr/local/lib/ruby/gems/3.4.0/gems/rubocop-1.91.0/lib/rubocop/cli.rb:88:in 'RuboCop::CLI#profile_if_needed'
/usr/local/lib/ruby/gems/3.4.0/gems/rubocop-1.91.0/lib/rubocop/cli.rb:45:in 'RuboCop::CLI#run'
/usr/local/lib/ruby/gems/3.4.0/gems/rubocop-1.91.0/exe/rubocop:15:in '<top (required)>'
/usr/local/lib/ruby/site_ruby/3.4.0/rubygems.rb:305:in 'Kernel#load'
/usr/local/lib/ruby/site_ruby/3.4.0/rubygems.rb:305:in 'Gem.activate_and_load_bin_path'
/usr/local/bin/rubocop:25:in '

'

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[greptile-apps]

Confidence Score: 5/5

[Low impact] The PR appears safe to merge.

Summary

Makes gem installs continue when mise reshim cannot start.

• Ruby gem and Bundler installs continue when mise reshim cannot start.

_{Reviews (3) · Last reviewed commit: "Merge branch 'main' into claude/github-i..." · Reviewed by Greptile}

[github-actions]

Instruction counts

benchmark	trend	instructions	Δ	wall (min)	Δ
env	▃▅▂▃▃█▇▅▁	30,969,539 → 30,909,994	-0.19%	20.83 → 20.57ms	-1.24%
hook-env	▃▄▃▃▄█▆▆▁	33,257,244 → 33,195,009	-0.19%	21.81 → 21.83ms	+0.05%
ls	▄▅▄▅▄▅█▃▁	35,328,433 → 35,316,190	-0.03%	22.62 → 23.15ms	+2.31%
registry	▁▁▁▁▄▃▆█▃	43,883,201 → 43,798,505	-0.19%	18.52 → 19.07ms	+2.95%
startup	▃▃▂▅▂▆█▄▁	12,072,712 → 12,038,668	-0.28%	12.72 → 12.68ms	-0.35%

No instruction-count regression above 1%.

_{Only instruction counts gate. Wall clock is shown for context — on identical hardware it moves 4-20% run to run.}

_{Measured by tak — instruction-counted CLI benchmarks, stored in this repository's git notes.}

_{339337c6d0ff vs 4e92675bf9fb · measured on the runner, not pushed to the history.}