How to get a list of all Subversion commit author usernames?

I'm looking for an efficient way to get the list of unique commit authors for an SVN repository as a whole, or for a given resource path. I haven't been able to find an SVN command specifically for this (and don't expect one) but I'm hoping there may be a better way that what I've tried so far in Terminal (on OS X):

svn log --quiet | grep "^r" | awk '{print $3}'

svn log --quiet --xml | grep author | sed -E "s:</?author>::g"

Either of these will give me one author name per line, but they both require filtering out a fair amount of extra information. They also don't handle duplicates of the same author name, so for lots of commits by few authors, there's tons of redundancy flowing over the wire. More often than not I just want to see the unique author usernames. (It actually might be handy to infer the commit count for each author on occasion, but even in these cases it would be better if the aggregated data were sent across instead.)

I'm generally working with client-only access, so svnadmin commands are less useful, but if necessary, I might be able to ask a special favor of the repository admin if strictly necessary or much more efficient. The repositories I'm working with have tens of thousands of commits and many active users, and I don't want to inconvenience anyone.

To filter out duplicates, take your output and pipe through: sort | uniq. Thus:

svn log --quiet | grep "^r" | awk '{print $3}' | sort | uniq

I woud not be surprised if this is the way to do what you ask. Unix tools often expect the user to do fancy processing and analysis with other tools.

P.S. Come to think of it, you can merge the grep and awk...

svn log --quiet | awk '/^r/ {print $3}' | sort | uniq

P.P.S. Per Kevin Reid...

svn log --quiet | awk '/^r/ {print $3}' | sort -u

P³.S. Per kan, using the vertical bars instead of spaces as field separators, to properly handle names with spaces (also updated the Python examples)...

svn log --quiet | awk -F ' \\\\|' '/^r/ {print $2}' | sort -u

For more efficient, you could do a Perl one-liner. I don't know Perl that well, so I'd wind up doing it in Python:

#!/usr/bin/env python
import sys
authors = set()
for line in sys.stdin:
    if line[0] == 'r':
        authors.add(line.split('|')[1].strip())
for author in sorted(authors):
    print(author)

Or, if you wanted counts:

#!/usr/bin/env python
from __future__ import print_function # Python 2.6/2.7
import sys
authors = {}
for line in sys.stdin:
    if line[0] != 'r':
        continue
    author = line.split('|')[1].strip()
    authors.setdefault(author, 0)
    authors[author] += 1
for author in sorted(authors):
    print(author, authors[author])

Then you'd run:

svn log --quiet | ./authorfilter.py

In PowerShell, set your location to the working copy and use this command.

svn.exe log --quiet |
? { $_ -notlike '-*' } |
% { ($_ -split ' \| ')[1] } |
Sort -Unique

The output format of svn.exe log --quiet looks like this:

r20209 | tinkywinky | 2013-12-05 08:56:29 +0000 (Thu, 05 Dec 2013)
------------------------------------------------------------------------
r20208 | dispy | 2013-12-04 16:33:53 +0000 (Wed, 04 Dec 2013)
------------------------------------------------------------------------
r20207 | lala | 2013-12-04 16:28:15 +0000 (Wed, 04 Dec 2013)
------------------------------------------------------------------------
r20206 | po | 2013-12-04 14:34:32 +0000 (Wed, 04 Dec 2013)
------------------------------------------------------------------------
r20205 | tinkywinky | 2013-12-04 14:07:54 +0000 (Wed, 04 Dec 2013)

Filter out the horizontal rules with ? { $_ -notlike '-*' }.

r20209 | tinkywinky | 2013-12-05 08:56:29 +0000 (Thu, 05 Dec 2013)
r20208 | dispy | 2013-12-04 16:33:53 +0000 (Wed, 04 Dec 2013)
r20207 | lala | 2013-12-04 16:28:15 +0000 (Wed, 04 Dec 2013)
r20206 | po | 2013-12-04 14:34:32 +0000 (Wed, 04 Dec 2013)
r20205 | tinkywinky | 2013-12-04 14:07:54 +0000 (Wed, 04 Dec 2013)

Split by ' \| ' to turn a record into an array.

$ 'r20209 | tinkywinky | 2013-12-05 08:56:29 +0000 (Thu, 05 Dec 2013)' -split ' \| '
r20209
tinkywinky
2013-12-05 08:56:29 +0000 (Thu, 05 Dec 2013)

The second element is the name.

Make an array of each line and select the second element with % { ($_ -split ' \| ')[1] }.

tinkywinky
dispy
lala
po
tinkywinky

Return unique occurrences with Sort -Unique. This sorts the output as a side effect.

dispy
lala
po
tinkywinky

I had to do this in Windows, so I used the Windows port of Super Sed ( http://www.pement.org/sed/ ) - and replaced the AWK & GREP commands:

svn log --quiet --xml | sed -n -e "s/<\/\?author>//g" -e "/[<>]/!p" | sort | sed "$!N; /^\(.*\)\n\1$/!P; D" > USERS.txt

This uses windows "sort" that might not be present on all machines.

One a remote repository you can use:

 svn log --quiet https://url/svn/project/ | grep "^r" | awk '{print $3}' | sort | uniq

svn log  path-to-repo | grep '^r' | grep '|' | awk '{print $3}' | sort | uniq > committers.txt

This command has the additional grep '|' that eliminates false values. Otherwise, Random commits starting with 'r' get included and thus words from commit messages get returned.

A solution for windows 10.

1. create a batch file printAllAuthor.bat

@echo off
for /f "tokens=3" %%a in ('svn log --quiet ^|findstr /r "^r"') do echo %%a
@echo on

2. run bat file with sort command

printAllAuthor.bat | sort /unique >author.txt

PS:

• The step 2 need run the batch file with right path. either set path in %PATH% or use the right OS path format.
• The step 2 can be made into a batch file as well according to your needs.

Powershell has support for XML which eliminates the need for parsing string output.

Here's a quick script I used on a mac to get a unique list of users across multiple repositories.

#!/usr/bin/env pwsh

$repos = @(
    'Common/'
    'Database/'
    'Integration/'
    'Reporting/'
    'Tools/'
    'Web/'
    'Webservices/'
)

foreach ($repo in $repos) {
    $url = "https://svn.example.com:8443/svn/$repo"
    $users += ([Xml](svn log $url --xml)).log.logentry.author | Sort-Object -Unique
}

$users | Sort-Object -Unique

A simpler alternative:

find . -name "*cpp" -exec svn log -q {} \;|grep -v "\-\-"|cut -d "|" -f 2|sort|uniq -c|sort -n