Source Code Management One Source of Truth. Track. Branch. Review. Audit.

Source Code Management (SCM) — also called version control — is the practice of tracking and managing changes to software code over time. It enables multiple developers to collaborate on the same codebase simultaneously, maintains a complete history of every change, and provides the ability to roll back to any previous state. SCM is the foundational layer of every modern DevSecOps pipeline.

Git is a distributed VCS — every developer has a full local copy of the repository history, enabling offline work and fast branching. SVN (Subversion) is centralised — all commits go to a single server, making it simpler but less resilient. Mercurial is also distributed and shares many concepts with Git but has a simpler command set. For most modern teams we recommend Git due to its ecosystem (GitHub/GitLab/Bitbucket), tooling support, and flexibility.

Our recommendation depends on your release model. For teams with continuous delivery, Trunk-Based Development (small, frequent commits to a single main branch with feature flags) maximises CI speed. For teams with scheduled releases, GitFlow provides structured feature, release, and hotfix branch management. We assess your team size, release cadence, and pipeline maturity before designing your branching model.

GitFlow is a branching model that defines specific roles for branches: main (production-ready code), develop (integration branch), feature/* (new work), release/* (release preparation), and hotfix/* (urgent production fixes). It is best suited for teams with defined release cycles and a need for parallel development across features and maintenance. It is less suitable for teams practising continuous deployment.

Merge conflicts are best prevented rather than resolved. Our approach includes: short-lived feature branches (merged within 1–2 days), trunk-based development for high-velocity teams, regular rebasing against the main branch, automated merge queue tools (GitHub Merge Queue, GitLab Merge Trains), and CODEOWNERS files that route conflicts to the correct reviewer — reducing conflict frequency and resolution time by over 70%.

A monorepo stores all services and libraries in a single repository — enabling atomic cross-service commits, unified tooling, and simpler dependency management (used by Google, Meta, and Nx-based projects). A polyrepo stores each service in its own repository — offering team autonomy and clearer ownership boundaries. We help you choose and implement the right model, including monorepo tooling (Nx, Turborepo, Bazel) when monorepos are selected.

SCM is the trigger for the entire CI/CD pipeline. A push or pull request event fires a webhook that starts the CI runner — building, testing, scanning, and packaging the code. Branch protection rules can block merges until all CI checks pass. Tag events trigger release pipelines. We configure these integrations for GitHub Actions, GitLab CI, Jenkins, Azure DevOps, and CircleCI — ensuring a seamless, automated path from commit to production.

Protected branches enforce rules that prevent direct pushes to critical branches (e.g. main, production) — requiring pull requests, minimum reviewer approvals, passing CI checks, and signed commits before code can be merged. They are a fundamental security control that prevents accidental or malicious direct changes to production code and forms part of the audit trail required by compliance frameworks like SOC 2 and ISO 27001.

We enforce Conventional Commits (or custom message formats) using commitlint in combination with Git hooks managed by Husky. This ensures every commit message is parseable for automated changelog generation, semantic versioning, and JIRA/issue-tracker linking. Server-side hooks in GitLab/GitHub further reject non-conformant messages before they reach the remote repository.

Semantic versioning (SemVer) uses a MAJOR.MINOR.PATCH format to communicate the nature of changes in each release. Integrated with SCM, tools like semantic-release analyse commit messages (using Conventional Commits) to automatically determine the next version number, generate changelogs, create Git tags, and publish release artefacts — removing the manual version-bumping step entirely from the release process.

Secrets should never exist in source code. We implement: git-secrets or truffleHog pre-commit hooks that block accidental credential commits; GitHub/GitLab Secret Scanning that alerts on existing exposures; integration with secrets managers (HashiCorp Vault, AWS Secrets Manager, Azure Key Vault) so secrets are injected at runtime via environment variables; and a secrets rotation playbook to remediate any historical exposures found during the SCM audit.

Pre-commit hooks run automated checks before a commit is accepted locally — catching issues at the earliest possible moment. Common checks include: code linting (ESLint, Pylint), formatting (Prettier, Black), secret scanning, unit test runs, and commit message validation. Managed using the pre-commit framework, these hooks are version-controlled and shared across the team — ensuring everyone's local environment enforces the same quality standards.

SCM provides the change management audit trail required by frameworks like SOC 2 (CC8.1), ISO 27001 (A.12.1.2), and PCI DSS. Every commit records who changed what, when, and why. Pull requests document the approval process. Signed commits with GPG keys provide non-repudiation. We configure these controls and generate compliance-ready reports — reducing audit preparation time from weeks to hours.

Yes. Git's distributed nature means every developer works from a local clone — no latency dependency on a central server. For large organisations with geo-distributed teams, we configure: GitHub Enterprise Server / GitLab self-managed with geo-replication for low-latency access; asynchronous PR review workflows with time-zone-aware SLA tracking; and global branch protection policies that enforce consistent standards regardless of where commits originate.

We start with a half-day SCM assessment workshop covering your current tooling, branching model, CI integration, access control model, and compliance obligations. Week 1 delivers a detailed SCM architecture document and quick wins — standardising repository naming, configuring branch protection, and cleaning up stale branches. Subsequent sprints progressively implement the new branching strategy, pre-commit hooks, CI integration, and audit controls — with team training and runbook documentation throughout.