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Mislav Marohnić

PROFILE

Mislav Marohnić

Worked extensively on the rbenv/ruby-build repository, delivering features and fixes that improved build reliability, cross-platform compatibility, and release management. Focused on scripting and automation using Bash, Ruby, and YAML, the work included upgrading OpenSSL integrations, enforcing version requirements for JRuby, and enhancing documentation to align with each release. Addressed edge-case bugs affecting Linux distributions and macOS, streamlined CI/CD workflows, and introduced user-facing warnings for deprecated Ruby and JRuby versions. The technical approach emphasized robust error handling, test-driven development, and clear user messaging, resulting in a more stable, maintainable build system for Ruby environments across diverse platforms.

Overall Statistics

Feature vs Bugs

55%Features

Repository Contributions

27Total
Bugs
9
Commits
27
Features
11
Lines of code
8,961
Activity Months8

Your Network

62 people

Same Organization

@mislav.net
1

Work History

February 2026

1 Commits • 1 Features

Feb 1, 2026

February 2026 monthly summary for rbenv/ruby-build: Upgraded Ruby-build to version 20260222 and aligned accompanying documentation with the updated manual and versioning; ensured traceability with a single commit reference; maintained release readiness and compatibility with downstream environments.

November 2025

1 Commits

Nov 1, 2025

November 2025: Focused security and compatibility work in rbenv/ruby-build by upgrading OpenSSL from 3.0.15 to 3.0.18 across all Ruby build configurations. This bug fix reduces security risk and aligns with current OpenSSL support. The change was implemented via an automated update flow (script/update-openssl) and recorded in commit d5c04d7540863ec75e7269b4c64a73b8133a5782.

September 2025

5 Commits • 1 Features

Sep 1, 2025

September 2025 monthly summary for rbenv/ruby-build. Focused on stabilizing build tooling, enabling release readiness, and hardening OpenSSL-related installations to improve reliability and time-to-ship. Deliverables and impact were achieved through targeted bug fixes, tooling enhancements, and process improvements that streamlined releases and reduced build failures. Key achievements: - Ruby-build tooling enhancements and release readiness (includes new issue templates, CI workflows, and scripts for managing Ruby and OpenSSL installations, plus code of conduct and contributing guidelines; release version bumps to prepare for a new build). Commits: 93a20ae5cfef21075bee8f09971b9a39b1921d02; ab15bd535f36ebf6741d35104ec1018e7fcf67ad; a71c27a9e7b8a0a0f76a8425fe4429ef1fd948a0. - OpenSSL version parsing bug fix: Replaced bash-based normalization with awk-based approach to ensure correct version comparisons and prevent build failures with OpenSSL v1.x. Commit: 28563f38a3fc60fb311c104d9f339dfc4958ec21. - Ruby-build script robustness bug fix: Corrected integer expression handling by validating the package variable name before evaluating the Ruby version; added tests to prevent warnings for non-Ruby packages. Commit: cf383ac114df157e56b078ae64ffc19f7b4e5929. Major benefits and business value: - Increased build reliability for OpenSSL-related installations, reducing sporadic build failures and support overhead. - Smoother release process with prepped version bumps, improved contributor onboarding via templates and guidelines, and updated CI/CD workflows. - Clear documentation of changes and quicker iteration for future releases. Technologies/skills demonstrated: - Bash-to-awk normalization approach, robust scripting, and test-driven fixes. - Ruby-build tooling improvements, CI workflow enhancements, release management, and contribution governance.

August 2025

5 Commits • 2 Features

Aug 1, 2025

August 2025 delivered major reliability improvements in ruby-build across JRuby EOL handling, OpenSSL integration, and release readiness. These changes reduce user build failures, provide clearer deprecation warnings, and align the tool with the latest ecosystem updates, enhancing stability and upgradeability for developers.

June 2025

2 Commits • 1 Features

Jun 1, 2025

June 2025: Maintained and improved ruby-build reliability and user-facing accuracy. Delivered documentation alignment with the 20250610 release and resolved a decimal-version check bug affecting Fedora/RHEL variants, enhancing cross-distro compatibility and deployment reliability for Ruby versions.

May 2025

2 Commits • 2 Features

May 1, 2025

May 2025 monthly summary for the rbenv/ruby-build project focusing on delivering stable feature work, enforcing compatibility guarantees, and improving release documentation.

January 2025

8 Commits • 3 Features

Jan 1, 2025

In January 2025, delivered key features and reliability improvements across brew and ruby-build, focusing on cross-platform stability, release readiness, and developer experience. Key outcomes include OpenSSL vendored installation reliability across platforms, structured version releases for ruby-build, enhanced test diagnostics for stub failures, clearer user-facing path guidance, and streamlined macOS compatibility by dropping Leopard support. These efforts reduce install-time failures, speed up issue resolution, and improve consistency across environments. Technologies demonstrated include cross-platform packaging and library lookup, RPATH handling, release engineering, enhanced debugging output, and improved user messaging.

November 2024

3 Commits • 1 Features

Nov 1, 2024

November 2024 performance summary for rbenv/ruby-build focused on stability and usability improvements. Delivered a bug fix for OpenSSL version lookup safety and introduced build-definition flexibility via named pipes with safeguards for --dir usage; added a proactive deprecation warning for Ruby 3.1 to help users plan migrations and reduce support burden.

Activity

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Quality Metrics

Correctness93.0%
Maintainability94.0%
Architecture91.8%
Performance92.6%
AI Usage20.0%

Skills & Technologies

Programming Languages

BashManManpageRubyShellbashmarkdownrubyyaml

Technical Skills

Bug FixingBuild ScriptingBuild SystemBuild SystemsCI/CDCLI DevelopmentCross-Platform DevelopmentDevOpsDocumentationError HandlingOpenSSLRelease ManagementRubyScriptingShell Scripting

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

rbenv/ruby-build

Nov 2024 Feb 2026
8 Months active

Languages Used

ShellBashManRubybashmarkdownrubyyaml

Technical Skills

Build ScriptingShell ScriptingVersion ManagementBuild SystemsCross-Platform DevelopmentOpenSSL

yairm210/brew

Jan 2025 Jan 2025
1 Month active

Languages Used

Ruby

Technical Skills

Build SystemsCLI DevelopmentError Handling