A script for recommending a reviewer for a diff.

recommend_reviewer.sh

#!/bin/bash

# A script for recommending a reviewer for a particular diff.
# Currently only supports mercurial repositories.

if [ "$1" = "" ]; then
    echo "Usage: recommend_reviewer REV1 REV2"
    exit 0
fi

gitdir ()
{
	# Note: this function is duplicated in git-completion.bash
	# When updating it, make sure you update the other one to match.
	if [ -z "${1-}" ]; then
		if [ -n "${__git_dir-}" ]; then
			echo "$__git_dir"
		elif [ -n "${GIT_DIR-}" ]; then
			test -d "${GIT_DIR-}" || return 1
			echo "$GIT_DIR"
		elif [ -d .git ]; then
			echo .git
		else
			git rev-parse --git-dir 2>/dev/null
		fi
	elif [ -d "$1/.git" ]; then
		echo "$1/.git"
	else
		echo "$1"
	fi
}

GIT_ROOT="$(gitdir)"
if [ "$GIT_ROOT" = "" ]; then
    HG_ROOT=`hg root 2>/dev/null`
    # Try HG
    if [ "$HG_ROOT" = "" ]; then
        echo "No git or mercurial repository found."
        exit 1
    else
        # echo "Found hg repo: $HG_ROOT"
        # TODO: make max recommendations an option.
        hg diff -r "$1:$2" --stat | awk '{ print $1; }' | head -n -1 | xargs hg annotate -r $2 -u | awk 'BEGIN { FS=":" } { print $1; }' | tr -d ' '| sort | uniq -c | sort -nr | head -n 10
    fi
else
    # echo "Found git repo: $GIT_ROOT"
    git diff --name-only $1 $2 | xargs -L1 git annotate $2 | awk 'BEGIN { FS="\t" } { print $2 }' | cut -c 2- | sort | uniq -c | sort -nr | head -n 10
fi