With the release of , the tool has moved beyond a simple scripting utility into a robust framework for managing shell script dependencies. Whether you are maintaining a complex build pipeline, orchestrating microservices in a legacy environment, or simply trying to source a hundred modular shell scripts without creating a chaotic mess, Version 46 promises to be a game-changer.

| Test Scenario | Raw Bash sourcing | Shell Dep v40 | Shell Dep v46 | |---------------|------------------|---------------|----------------| | 100 local dependencies | 1.8s | 2.2s | 1.1s | | 50 remote dependencies (cached) | N/A | 4.1s | 2.0s | | Cyclic dependency detection | Manual | 0.9s | 0.2s | | Memory overhead (peak) | 12MB | 28MB | 19MB |

dep space create ci-runner dep space activate ci-runner dep add mylib@1.2.0 dep run ./deploy.sh # Runs inside isolated environment This is similar to virtualenv but for shell functions. You are migrating a 20-year-old Solaris server to RHEL 9. The old scripts use hardcoded paths like /opt/local/bin/custom . With Shell Dep Version 46, you create a compatibility layer:

dep self-check --checksum Version 46 will confirm its own SHA-512 against a signed manifest. Let’s explore three scenarios where Shell Dep Version 46 shines. Use Case 1: Modular Bash Library for DevOps You have 50 Bash scripts for AWS operations, many sharing logging.sh and aws-helpers.sh . Without Shell Dep, you manually source files, leading to duplicate sourcing and variable collisions.

Introduction: What is Shell Dep Version 46? In the rapidly evolving landscape of software development and system administration, dependency management often takes center stage. While package managers like apt , yum , and npm dominate the conversation, a quieter, more specialized tool has been gaining traction among embedded systems engineers, DevOps professionals, and Unix power users: Shell Dep .

The learning curve is modest (an afternoon of experimentation), and the payoff is immediate: no more source: file not found errors, no more accidental variable overrides, and no more circular dependency headaches.

# dep: lib/*.sh # dep: config/**/env-*.sh The resolver intelligently expands these patterns at runtime, caching the matched file list in the lockfile. This reduces sourcing overhead by up to 40% in projects with many small script files. While cycle detection existed before, Version 46 adds an interactive repair mode. When a circular dependency is detected (e.g., a.sh requires b.sh and b.sh requires a.sh ), the tool now outputs a visual graph of the cycle and suggests refactoring steps, such as extracting shared functions into a common third file. 3. End-to-End Checksum Verification (SHA-512) Security has been a major focus. Version 46 deprecates SHA-256 in favor of SHA-512 for verifying remote dependencies. Additionally, a new dep verify --integrity command scans the entire dependency tree, ensuring no file has been altered since the last dep install . This is critical for compliance-heavy environments (PCI-DSS, HIPAA). 4. Lazy Sourcing with dep:load-if-exists One of the most requested features finally lands in Version 46: conditional dependency loading. The new directive # dep:load-if-exists optional/helper.sh allows a script to attempt sourcing a file without failing if it is missing. This enables graceful degradation and plugin-like architectures. 5. Native Windows PowerShell Bridge While Shell Dep was born on Unix, Version 46 ships with a PowerShell Core bridge module. You can now call Shell Dep functions directly from PowerShell scripts, making cross-platform CI/CD pipelines far less painful. 6. Deprecation Warnings and Migration Assistant To ease upgrades, Version 46 includes a dep upgrade --check-only flag that scans your existing manifest and warns about features that will become obsolete in Version 50 (expected 2026). The assistant can even automatically rewrite old-style # require comments to the new # dep: syntax. Core Concepts of Shell Dep Version 46 Before using Shell Dep Version 46, you must grasp four core concepts: the manifest, the lockfile, resolution strategies, and execution contexts. The Manifest ( ShellDepfile ) This TOML or YAML file (both are supported in Version 46) declares your project’s shell dependencies. A minimal example in TOML:

# dep: compat/solaris-to-linux.sh # dep:load-if-exists /opt/local/bin/custom The load-if-exists prevents failures during the phased migration. The development team published benchmarks comparing Version 46 against Version 40 (the previous long-term support release) and raw Bash sourcing.