Shared Bash Library for GitLab CI/CD

Problem Context

DevOps teams use GitLab CI/CD to automate builds and deployments. They need to share reusable bash functions across multiple repositories to avoid duplication. Currently, GitLab only allows including YAML files, forcing teams to write messy inline scripts in .gitlab-ci.yml. This makes pipelines harder to read, maintain, and update.

Pain Points

Teams waste time rewriting the same bash functions in every repository. Inline scripts in YAML are hard to debug and edit in IDEs. When functions need updates, they must be changed manually in every pipeline, increasing the risk of errors. The lack of versioning for shared functions leads to inconsistencies across projects.

Impact

Wasted engineering time slows down deployments and increases operational costs. Messy pipelines make onboarding new team members harder. Broken or outdated functions can cause failed builds, leading to downtime. Teams miss opportunities to standardize and improve their CI/CD workflows due to technical limitations.

Urgency

This problem grows with the number of repositories and teams. As companies scale, maintaining shared functionality becomes unsustainable without a proper solution. Teams cannot ignore this because it directly impacts their ability to deliver software efficiently. The longer they wait, the more technical debt accumulates.

Target Audience

DevOps engineers, CI/CD pipeline maintainers, and engineering managers at mid-to-large tech companies using GitLab. Teams with multiple repositories that share common build, test, or deployment logic will face this problem. Open-source projects and internal tooling teams also struggle with this limitation.

Solution Approach

A hosted service that acts as a central repository for reusable bash functions. Teams can store their shared functions in this library and include them in any GitLab pipeline using a simple include directive. The service handles versioning, updates, and access control, so teams always use the correct version of a function. This eliminates the need for inline scripts in YAML and makes shared functionality easy to maintain.

Key Features

1. GitLab Integration: Include functions in pipelines using a native include directive (e.g., include: shared-bash://function-name).
2. IDE-Friendly Editing: Edit functions in a web-based IDE with syntax highlighting and collaboration tools.
3. Automatic Updates: Push updates to functions once, and all pipelines using them get the latest version (with optional approval workflows).

User Experience

Teams add a single line to their .gitlab-ci.yml to include a shared function. The service fetches the function at runtime, so pipelines always use the correct version. Engineers edit functions in a familiar IDE, and updates propagate automatically. Managers get visibility into which teams use which functions, reducing duplication and improving consistency.

Differentiation

Unlike manual workarounds (e.g., copying scripts or using Git submodules), this service is designed specifically for GitLab CI/CD. It avoids hacks like storing bash files in YAML or using external scripts. The native integration ensures compatibility with GitLab’s security and access controls. Competitors either don’t exist or require complex setup (e.g., self-hosted solutions).

Scalability

Start with a freemium tier for public functions, then add private repositories for teams. Scale by offering advanced features like team collaboration, audit logs, and CI/CD analytics. Enterprise plans can include SLAs, dedicated support, and custom integrations. The service grows with the user’s needs as their number of repositories and teams increases.

Expected Impact

Teams save hours of manual work per week by eliminating duplicate scripts. Pipelines become cleaner, easier to debug, and faster to update. Standardized functions reduce errors and improve deployment reliability. Engineering managers gain better visibility and control over shared infrastructure, leading to more efficient workflows.