How do I get the total number of authors contributed to a git repository by using the terminal?

Question

I want to find out how many people contributed to a git repository. So basically I just want a number.

Answer 1

应该这样做：

git log --all --pretty="%an" | sort | uniq | wc -l

Answer 2

Git has this build in withe the shortlog command

git shortlog -s -n --all 

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git shortlog

git-shortlog - Summarize git log output

-s, --summary
Suppress commit description and provide a commit count summary only.

-n, --numbered
Sort output according to the number of commits per author instead of author alphabetic order.

-all
Collect records form all branches

Note:
If you want to exclude merges add the --no-merges flag as well

To get a single count add the | sort | uniq | wc -l | sort | uniq | wc -l | sort | uniq | wc -l as @eftshift0 suggested

git shortlog -s -n --all --no-merges | sort | uniq | wc -l