Commit

As explained in Building User-Friendly DSLs

A version-control record representing the state of tracked content at a particular point in time.

A commit records the state of code at a particular point in time and carries its own identity. In Git, that identity is a 40-character hexadecimal SHA hash. section 10.1

Use commits to support collaborative, distributed change workflows:

• Branch from a mainline version. section 10.1
• Record and share changes as a sequence of commits on a branch. section 10.1
• Have the completed work reviewed, then merge it into the mainline. section 10.1

A commit sequence

A feature branch can accumulate several commits while the mainline changes. Merging the sequence may produce merge conflicts when concurrent changes cannot be consolidated automatically, requiring manual resolution. section 10.1

Figure 10.2 The main concepts of a DVCS, and a typical interaction

Visualizes commits, branches, tags, and their typical interactions in a distributed version-control workflow. section 10.1

How Building User-Friendly DSLs covers it

How deep it goes

Defines commit identity and workflow use, then describes accumulated changes and manual merge-conflict resolution.

Examples

Uses Git SHA hashes, feature-branch commit sequences, code review, mainline merges, and manually resolved conflicts.

What it assumes

Assumes collaborative codebase work and introduces distributed version-control concepts through commits, branches, and tags.

What you can do after

Operate Git-based collaborative workflows by recording changes, sharing commit sequences, reviewing work, and merging branches.

How it connects

Connects commits with distributed version control systems, Git, branches, tags, merging, and merge conflicts.

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Also explained in

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  Designing Deep Learning Systems: A guide for software engineersAn immutable recorded unit of dataset ingestion or change, containing newly added content and associated metadata such as tags and messages.
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  .NET in Action, Second EditionThe commit phase is the stage of a transaction in which its pending changes are finalized in the data store.
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  Road to KubernetesA commit is a recorded snapshot of changes in a Git repository, identified by a commit identifier and optionally accompanied by a message.
• 

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  Kafka for ArchitectsIn Kafka, a commit is either confirmation that messages are safely stored or an indication that a consumer has advanced past processed messages, while in databases it finalizes a transaction.

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Related concepts

• postincident analysisproduced by · Postincident analysis is a structured examination of an incident and its response to understand what occurred, identify causes, and determine improvements or corrective actions.
• calculation phasecontrasts with · The calculation phase is the phase of a mutation that computes the next version of system data without advancing the current state.
• ArgoCDused by · Argo CD is a declarative GitOps continuous-delivery tool that deploys and synchronizes applications on Kubernetes from version-controlled configuration.

This explainer was generated by Manning's knowledge graph from the text of Building User-Friendly DSLs. The section links point to the parts of the book it draws on.