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Branch

As explained in Infrastructure as Code, Patterns and Practices: With examples in Python and Terraform

A branch is a named line of development in a version-control repository that maintains changes independently from other lines until they are combined.

A branch is a version-control pointer to a code snapshot. It isolates changes so they can be implemented, tested, reviewed, and later merged into the main branch. section 7.1.5 section 7.2.1

Infrastructure change isolation

One engineer develops firewall changes on TICKET-002 while a teammate updates a license on TICKET-005. After the firewall change reaches main, the teammate retrieves it, tests the combined configuration, and resolves conflicts before merging. section 7.2.1

How Infrastructure as Code, Patterns and Practices: With examples in Python and Terraform covers it

How deep it goes
Defines branches and demonstrates creation, committing, pushing, updating, merging, testing, and conflict reconciliation.
Examples
Uses firewall rules, license updates, emergency module fixes, and operating-system image rollbacks as concrete cases.
What it assumes
Assumes familiarity with repositories, configuration changes, commits, and testing while demonstrating the branch workflow explicitly.
What you can do after
Apply it via Git to isolate, commit, publish, update, test, and merge infrastructure changes.
How it connects
Connects branches with version control, feature-based development, main branches, remote branches, merging, and continuous deployment.

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