What is the difference between git tag and branch?

Difference: 1. Tag is a point in a series of commits, which can only be viewed and cannot be moved; while branch is a series of commit lines in series and can be extended. 2. Tag is static, branch is dynamic and needs to move forward.

The operating environment of this tutorial: Windows 7 system, Git version 2.30.0, Dell G3 computer.

The difference between tag and branch

• Git tag is a point in a series of commits. It can only be viewed and cannot be moved. A branch is a series of commit lines connected in series.

• tag is static, branch is dynamic and needs to move forward.
  

Usage of git tag

• We often use git to create a tag when sealing the code, like this The unmodifiable historical code version is as if it has been sealed by us. Whether it is operation and maintenance release pull, or future code version management, it is very convenient

git's tag function

There are actually two situations when tagging under git

• Lightweight: It is actually an independent branch, or an immutable one Branch. A reference to a specific commit object

• With annotation: It is actually an independent object stored in the warehouse. It has its own checksum information, including the name of the tag and the tag description. , the tag itself also allows the use of GNU Privacy Guard (GPG) to sign or verify, email address and date. Generally, we recommend using tags with comments to retain relevant information

So we recommend using the second tag form

Create tag

• ##git tag -a V1.2 -m 'release 1.2 '

  With the above command we successfully created a local version V1.2 and added the annotation information 'release 1.2'

• git tag
  To display the annotation information, we need to use the show command to view

• git show V1.2
  But currently this tag is only submitted to the local git repository. How to synchronize to the remote code repository

• git push origin --tags
  If you just synchronized it, you A fatal bug was discovered and the version needs to be re-released. It is not too late.

• git tag -d V1.2
  At this point we just deleted it The local V1.2 version, but the online V1.2 version still exists, what should I do? At this time, we can push the empty version of the same name offline to achieve the goal of deleting the online version:

• git push origin :refs/tags/V1.2
  How to get the remote version?

• git fetch origin tag V1.2
  In this way we can accurately pull a specified version. It is suitable for operation and maintenance students to deploy the specified version.

Git Tutorial"

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