# Git statistics

# Lines of code per developer

git ls-tree -r HEAD | sed -Ee 's/^.{53}//' | \
while read filename; do file "$filename"; done | \
grep -E ': .*text' | sed -E -e 's/: .*//' | \
while read filename; do git blame --line-porcelain "$filename"; done | \
sed -n 's/^author //p' | \
sort | uniq -c | sort -rn

# Listing each branch and its last revision's date

for k in `git branch -a | sed s/^..//`; do echo -e `git log -1 --pretty=format:"%Cgreen%ci %Cblue%cr%Creset" $k --`\\t"$k";done | sort

# Commits per developer

Git shortlog is used to summarize the git log outputs and group the commits by author.

By default, all commit messages are shown but argument --summary or -s skips the messages and gives a list of authors with their total number of commits.

--numbered or -n changes the ordering from alphabetical (by author ascending) to number of commits descending.

git shortlog -sn        #Names and Number of commits

git shortlog -sne       #Names along with their email ids and the Number of commits

git log --pretty=format:%ae \
| gawk -- '{ ++c[$0]; } END { for(cc in c) printf "%5d %s\n",c[cc],cc; }'

Note: Commits by the same person may not be grouped together where their name and/or email address has been spelled differently. For example John Doe and Johnny Doe will appear separately in the list. To resolve this, refer to the .mailmap feature.

# Commits per date

git log --pretty=format:"%ai" | awk '{print " : "$1}' | sort -r | uniq -c

# Total number of commits in a branch

git log  --pretty=oneline |wc -l

# List all commits in pretty format

git log --pretty=format:"%Cgreen%ci %Cblue%cn  %Cgreen%cr%Creset %s"

This will give a nice overview of all commits (1 per line) with date, user and commit message.

The --pretty option has many placeholders, each starting with %. All options can be found here (opens new window)

# Find All Local Git Repositories on Computer

To list all the git repository locations on your you can run the following

find $HOME -type d -name ".git"

Assuming you have locate, this should be much faster:

locate .git |grep git$

If you have gnu locate or mlocate, this will select only the git dirs:

locate -ber \\.git$

# Show the total number of commits per author

In order to get the total number of commits that each developer or contributor has made on a repository, you can simply use the git shortlog:

git shortlog -s

which provides the author names and number of commits by each one.

Additionally, if you want to have the results calculated on all branches, add --all flag to the command:

git shortlog -s --all

# Syntax

git log [][] [[--] ]
git log --pretty=short | git shortlog []
git shortlog [][] [[--] ]

# Parameters

Parameter	Details
`-n`, `--numbered`	Sort output according to the number of commits per author instead of alphabetic order
`-s`, `--summary`	Only provide a commit count summary
`-e`, `--email`	Show the email address of each author
`--format`[=]	Instead of the commit subject, use some other information to describe each commit. can be any string accepted by the `--format` option of `git log`.
`-w`[[,[,]]]	Linewrap the output by wrapping each line at `width`. The first line of each entry is indented by `indent1` number of spaces, and subsequent lines are indented by `indent2` spaces.
	Show only commits in the specified revision range. Default to the whole history until the current commit.
[`--`]	Show only commits that explain how the files matching `path` came to be. Paths may need to be prefixed with "-- " to separate them from options or the revision range.

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