feat(ruby): set PKG_CONFIG_PATH for native gem extensions#7457
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When the rubygems_plugin is loaded, prepend the Ruby installation's lib/pkgconfig directory to PKG_CONFIG_PATH. This allows gems with native extensions (openssl, psych, ffi, etc.) to find the bundled headers and libraries from precompiled Ruby binaries. Fixes: #7268 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <[email protected]>
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Pull request overview
This PR adds automatic PKG_CONFIG_PATH configuration for the rubygems plugin to support native gem extensions. When the plugin loads, it prepends Ruby's pkg-config directory to PKG_CONFIG_PATH, enabling gems with native extensions (openssl, psych, ffi) to locate bundled headers and libraries from precompiled Ruby binaries without manual environment setup.
Key changes:
- Adds PKG_CONFIG_PATH configuration at plugin initialization
- Uses RbConfig to locate Ruby's pkg-config directory
- Preserves existing PKG_CONFIG_PATH values
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Hyperfine Performance
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| Command | Mean [ms] | Min [ms] | Max [ms] | Relative |
|---|---|---|---|---|
mise-2025.12.12 x -- echo |
20.5 ± 0.7 | 19.1 | 24.9 | 1.03 ± 0.04 |
mise x -- echo |
20.0 ± 0.4 | 19.2 | 22.2 | 1.00 |
mise env
| Command | Mean [ms] | Min [ms] | Max [ms] | Relative |
|---|---|---|---|---|
mise-2025.12.12 env |
19.3 ± 0.7 | 18.6 | 25.7 | 1.00 |
mise env |
19.5 ± 0.3 | 18.8 | 21.3 | 1.01 ± 0.04 |
mise hook-env
| Command | Mean [ms] | Min [ms] | Max [ms] | Relative |
|---|---|---|---|---|
mise-2025.12.12 hook-env |
19.4 ± 0.3 | 18.8 | 20.4 | 1.00 |
mise hook-env |
19.8 ± 0.5 | 19.1 | 23.6 | 1.02 ± 0.03 |
mise ls
| Command | Mean [ms] | Min [ms] | Max [ms] | Relative |
|---|---|---|---|---|
mise-2025.12.12 ls |
17.1 ± 0.3 | 16.4 | 18.6 | 1.00 |
mise ls |
17.4 ± 0.9 | 16.5 | 26.0 | 1.01 ± 0.05 |
xtasks/test/perf
| Command | mise-2025.12.12 | mise | Variance |
|---|---|---|---|
| install (cached) | 110ms | 109ms | +0% |
| ls (cached) | 65ms | 66ms | -1% |
| bin-paths (cached) | 73ms | 72ms | +1% |
| task-ls (cached) | 2260ms | 2268ms | +0% |
Use File::PATH_SEPARATOR instead of hardcoded colon for PKG_CONFIG_PATH concatenation. This ensures correct behavior on Windows (which uses ;) in addition to Unix-like systems (which use :). 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <[email protected]>
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Summary
When the rubygems_plugin is loaded, prepend the Ruby installation's
lib/pkgconfigdirectory toPKG_CONFIG_PATH. This allows gems with native extensions (openssl, psych, ffi, etc.) to find the bundled headers and libraries from precompiled Ruby binaries.Background
Precompiled Ruby binaries from jdx/ruby now include:
${pcfiledir}However, for
gem install opensslto work, pkg-config needs to find these.pcfiles. This PR setsPKG_CONFIG_PATHin the rubygems plugin so it's only active during gem operations.Related PR: jdx/ruby#1
Test plan
gem install openssl- should succeed without manual PKG_CONFIG_PATH setupgem install psych- should find libyaml headers🤖 Generated with Claude Code
Note
Prepends Ruby’s
lib/pkgconfigtoPKG_CONFIG_PATHin the rubygems plugin so native gem extensions can find bundled headers and libraries.lib/pkgconfigtoPKG_CONFIG_PATHinsrc/plugins/core/assets/rubygems_plugin.rb(when present) so native gem extensions can locate bundled headers/libs.Written by Cursor Bugbot for commit f0e9b93. This will update automatically on new commits. Configure here.