#!/bin/bash
# vim: set ts=8 sts=8 sw=8 noet:

GERRIT_HOSTNAME=${GERRIT_HOSTNAME:-cr.joyent.us}
COLUMN_COUNT=${COLUMN_COUNT:-60}

#
# Detect the Gerrit username and project by listing the URLs for each
# remote and looking for one which matches our Gerrit hostname:
#
if ! git_config=$(git config --local --list); then
	printf 'ERROR: could not get git config\n' >&2
	exit 1
fi

url=
if ! url=$(/usr/bin/nawk -v pat="@$GERRIT_HOSTNAME:" '
	BEGIN {
		pushurl = 0;
		url = 0;
	}

	{
		FS = "=";
		$0 = $0;

		key = $1;
		val = $2;

		FS = ".";
		$0 = $1;
	}

	NF == 3 && $1 == "remote" && $3 ~ "url$" &&
	    index(val, pat) != 0 {
		if ($3 == "pushurl") {
			pushurl = val;
		} else {
			url = val;
		}
	}

	END {
		if (!pushurl && !url) {
			exit(1);
		}

		printf("%s", pushurl ? pushurl : url);
		exit (0);
	}
    ' <<< "$git_config") ; then #|| [[ -z $url ]]; then
	printf 'ERROR: could not find a Gerrit remote\n' >&2
	exit 1
fi

#
# Trim the username and project name out of the Gerrit remote URL:
#
url=${url%.git}
project=${url##*@${GERRIT_HOSTNAME}:}
user=${url%@${GERRIT_HOSTNAME}:*}

if [[ -n $V ]]; then
	printf 'user:       %s\n' "$user" >&2
	printf 'project:    %s\n' "$project" >&2
fi

query="status:open project:$project"
if [[ $1 != "-a" ]]; then
	query="$query owner:$user"
fi

if ! res=$(ssh "$user@cr.joyent.us" gerrit query "$query"); then
	printf 'ERROR: could not query gerrit\n' >&2
	exit 1
fi

/usr/bin/nawk -v cc=$COLUMN_COUNT '
	BEGIN {
		count = 0;
	}

	/^change/ {
		number = -1;
		subject = 0;
	}

	$1 == "number:" {
		number = $2
	}

	$1 == "subject:" {
		subject = $0;
		gsub(".*subject: ", "", subject);
		extra = "";
		if (length(subject) >= cc) {
			extra = "...";
		}
		subject = substr(subject, 1, cc) "" extra;
	}

	/^$/ {
		printf("%d -- %s\n", number, subject);
		count++;
	}

	END {
		if (count == 0) {
			printf("no open reviews found!\n");
		}
	}
' <<< "$res"