#! /usr/bin/ksh
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#

#
# Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#

# Copyright 2010, Richard Lowe

#
# Easy setup script for populating a user's ~/.hgrc
# This currently does the following:
#	* Load the cadmium extension
#	* Populate the author/email fields to be correct
#	* Alias canonical repositories like onnv-gate
#	* Configures mercurial to use appropriate merge tools
#
# See hgrc(5) for more information
#

setvar HGRC = "$HOME/.hgrc"

proc usage {
	setvar prog = $(basename "$0")
	echo \
"usage: $prog [-f] [-c cdm_path] [-m merge_path] [-n name] [-e email] [-p proxy] [-s style_path]
	-f            : force overwriting $HGRC
	-c cdm_path   : override Cadmium path
	-m merge_path : override path to merge tool
	-n name       : override name (for ui.username)
	-e email      : override email (for email.from)
	-p proxy      : enable use of web proxy with specified proxy
	-s style_path : override path to style file

	if -n isn't provided, the entry from /etc/passwd is used
	
	proxy should be in the form of hostname:port
	"
	exit 1
}

while getopts c:e:fm:n:p:s: opt {
	match $opt {
	with c setvar cdm_path = "$OPTARG"
	with e setvar email = "$OPTARG"
	with f setvar force = '1'
	with m setvar merge_path = "$OPTARG"
	with n setvar name = "$OPTARG"
	with p setvar proxy = "$OPTARG"
	with s setvar style_path = "$OPTARG"
	with * usage
	}
}

if test -f $HGRC -a $force -eq 0 {
	echo "Error: You have an existing .hgrc in $HGRC"
	echo "Please move it aside."
	exit 1
}

setvar AWK = ""/usr/xpg4/bin/awk""
setvar SED = ""/usr/bin/sed""
setvar LDAPCLIENT = ""/usr/bin/ldapsearch""

setvar login = $(/usr/bin/id -un)

#
# Try and determine where SUNWonbld is installed.  In order of
# preference, look in:
#
#   1. $(whence $0), on the assumption that you want the version
#      of SUNWonbld that best matches the hgsetup script you invoked
#
#   2. /opt/onbld, because local is generally better
#
#   3. /ws/onnv-tools/onbld, it's nfs and it might be slow, but it
#      should resolve from most places on-SWAN
#
setvar paths = ""$(dirname $(dirname $(whence $0))) /opt/onbld /ws/onnv-tools/onbld""
setvar cdmbin = ""lib/python/onbld/hgext/cdm.py""
setvar stylefile = ""etc/hgstyle""

for dir in [$paths] {
	if [[ -f "$dir/$cdmbin" && -z "$cdm_path" ]] {
		setvar cdm_path = ""$dir/$cdmbin""
	}

	if [[ -f "$dir/$stylefile" && -z "$style_path" ]] {
		setvar style_path = ""$dir/$stylefile""
	}

	if [[ -n "$cdm_path" && -n "$style_path" ]] {
		break
	}
}

if [[ -n $proxy ]] {
	setvar proxyConfig = ""[http_proxy]
host=$proxy
""
}

if [[ -z $email ]] {
	setvar my_id = $(id -un)
	setvar my_hostname = $(hostname)
	setvar possible_fqhns = $(getent hosts $my_hostname | cut -f 2-) 
	setvar my_fqhn = $(for i in [$possible_fqhns] { match $i { with *.* echo $i; break }; }) 
	setvar email = ""$my_id@$my_fqhn""
	echo "No e-mail address provided, defaulting to $email"
}

if [[ -z "$name" ]] {
	setvar name = ${name:=$(getent passwd $login | awk -F: '{print $5}')}
}
setvar username = ""$name <$email>""

echo "Configured the following:"
if [[ -n $proxy ]] {
	echo "	proxy: $proxy"
}
echo "	email: $email"
echo "	username: $name"
echo "	style: $style_path"
echo "	cadmium: $cdm_path"

if [[ -z "$cdm_path" ]] {
	echo "Warning: you will need to edit your .hgrc file\n" \
	     "to specify a path for cadmium."
}

if [[ -n $merge_path ]] {
	echo "	merge: $merge_path"
}

cat <<< """ >$HGRC
$proxyConfig[extensions]
hgext.cdm=$cdm_path

[email]
from=$email

[paths]
onnv-gate=ssh://anon@hg.opensolaris.org//hg/onnv/onnv-gate
illumos-gate=ssh://anonhg@hg.illumos.org/illumos-gate

[merge-tools]
filemerge.gui=True
filemerge.args=-a '$'base '$'local '$'other '$'output
filemerge.priority=1
filemerge.premerge=False

meld.gui=True
meld.priority=0
meld.premerge=False

gpyfm.gui=True
gpyfm.priority=0
gpyfm.premerge=False

[ui]
username=$username
style=$style_path
"""
>$HGRC
$proxyConfig[extensions]
hgext.cdm=$cdm_path

[email]
from=$email

[paths]
onnv-gate=ssh://anon@hg.opensolaris.org//hg/onnv/onnv-gate
illumos-gate=ssh://anonhg@hg.illumos.org/illumos-gate

[merge-tools]
filemerge.gui=True
filemerge.args=-a \$base \$local \$other \$output
filemerge.priority=1
filemerge.premerge=False

meld.gui=True
meld.priority=0
meld.premerge=False

gpyfm.gui=True
gpyfm.priority=0
gpyfm.premerge=False

[ui]
username=$username
style=$style_path
EOF

if [[ -n $merge_path ]] {
	echo "merge=$merge_path" >> $HGRC
}

echo "Please check $HGRC and verify everything looks correct"