使用 git 描述从 git 获取最新的主标签版本

Question

I have lot of tags for candidate and dev like:

• 1.1.1-dev.2
• 1.1.2-rc.0

i would like to get the last main tag in git that match to production semver

for example: for version 1.1.2-rc.0

i will get the last production tag that was 1.1.1

i was trying the following:

git describe --tags --abbrev=1 

 git describe  --abbrev=0  | awk -F - '{print $1}'

will give me 1.1.2 but there is no tag like that

Answer 1

i would like to get the last main tag in git that match to production semver

Tags, in Git, are not on branches. They are on commits. So "main tag" does not seem to mean anything.

 git describe --abbrev=0 | awk -F - '{print $1}'

will give me 1.1.2 but there is no tag like that

Of course: you told awk to treat - as a field separator, so that 1.1.2-rc.0 was treated as two fields containing 1.1.2 and rc.0 : those are the two strings that are separated by the - character. Then you told awk to print the first field, ignoring the second one entirely, and it did exactly what you asked.

The git describe command here may be the wrong tool to use. It's not clear what the right tool would be, as it's not clear from your question what tag you want based on the specific commit. However, if what you want is:

• the git describe tag if it does not end with -rc* (glob syntax), or
• the git describe tag converted to a three-part number, minus 1, if it does end with rc*

then you can do that with git describe . The problem with this is likely to occur at boundaries: if you're on 1.1.2-rc0 it's pretty clear that the previous version would be 1.1.1 , but if you're on 1.1.0-rc3 for instance, is the previous version 1.0.0 , 1.0.19`, or what? What does previous version mean in this context? Why do you need a "previous version" in the first place?

You may need to write a program to compute the answer you want, depending on what the question is. You'll need to figure out your precise question first.