Make tests append settings to $HGRCPATH instead of $HGTMP/.hgrc

and add documentation for this.

tests/README

@@ -31,3 +31,6 b' writing tests:'
   use hg diff | sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
                     -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/"
   to strip dates
+
+- You can append your own hgrc settings to the file that the environment
+  variable HGRCPATH points to. This file is cleared before running a test.

tests/test-abort-checkin

@@ -1,8 +1,7 b''
 #!/bin/sh
 
-HGRCPATH=$HGTMP/.hgrc; export HGRCPATH
-echo "[extensions]" >> $HGTMP/.hgrc
-echo "mq=" >> $HGTMP/.hgrc
+echo "[extensions]" >> $HGRCPATH
+echo "mq=" >> $HGRCPATH
 cat > $HGTMP/false <<EOF
 #!/bin/sh
 exit 1

tests/test-bisect

@@ -2,9 +2,8 b''
 
 set -e
 
-HGRCPATH=$HGTMP/.hgrc; export HGRCPATH
-echo "[extensions]" >> $HGTMP/.hgrc
-echo "hbisect=" >> $HGTMP/.hgrc
+echo "[extensions]" >> $HGRCPATH
+echo "hbisect=" >> $HGRCPATH
 
 echo % init
 hg init

tests/test-extdiff

@@ -1,8 +1,7 b''
 #!/bin/sh
 
-HGRCPATH=$HGTMP/.hgrc; export HGRCPATH
-echo "[extensions]" >> $HGTMP/.hgrc
-echo "extdiff=" >> $HGTMP/.hgrc
+echo "[extensions]" >> $HGRCPATH
+echo "extdiff=" >> $HGRCPATH
 
 hg init a
 cd a
@@ -14,9 +13,9 b' if [ $? -ne 0 ]; then'
 fi
 hg extdiff -o -Nr $opt
 
-echo "[extdiff]" >> $HGTMP/.hgrc
-echo "cmd.falabala=echo" >> $HGTMP/.hgrc
-echo "opts.falabala=diffing" >> $HGTMP/.hgrc
+echo "[extdiff]" >> $HGRCPATH
+echo "cmd.falabala=echo" >> $HGRCPATH
+echo "opts.falabala=diffing" >> $HGRCPATH
 
 hg falabala
 

tests/test-fetch

@@ -1,8 +1,7 b''
 #!/bin/sh
 
-HGRCPATH=$HGTMP/.hgrc; export HGRCPATH
-echo "[extensions]" >> $HGTMP/.hgrc
-echo "fetch=" >> $HGTMP/.hgrc
+echo "[extensions]" >> $HGRCPATH
+echo "fetch=" >> $HGRCPATH
 
 hg init a
 echo a > a/a

tests/test-mq

@@ -1,8 +1,7 b''
 #!/bin/sh
 
-HGRCPATH=$HGTMP/.hgrc; export HGRCPATH
-echo "[extensions]" >> $HGTMP/.hgrc
-echo "mq=" >> $HGTMP/.hgrc
+echo "[extensions]" >> $HGRCPATH
+echo "mq=" >> $HGRCPATH
 
 echo % help
 hg help mq
@@ -127,7 +126,7 b' hg ci -Ama'
 hg strip tip 2>&1 | sed 's/\(saving bundle to \).*/\1/'
 hg unbundle .hg/strip-backup/*
 
-cat >>$HGTMP/.hgrc <<EOF
+cat >>$HGRCPATH <<EOF
 [diff]
 git = True
 EOF

tests/test-mq-guards

@@ -1,8 +1,7 b''
 #!/bin/sh
 
-HGRCPATH=$HGTMP/.hgrc; export HGRCPATH
-echo "[extensions]" >> $HGTMP/.hgrc
-echo "mq=" >> $HGTMP/.hgrc
+echo "[extensions]" >> $HGRCPATH
+echo "mq=" >> $HGRCPATH
 
 hg init
 hg qinit

tests/test-mq-qdiff

@@ -1,8 +1,7 b''
 #!/bin/sh
 
-HGRCPATH=$HGTMP/.hgrc; export HGRCPATH
-echo "[extensions]" >> $HGTMP/.hgrc
-echo "mq=" >> $HGTMP/.hgrc
+echo "[extensions]" >> $HGRCPATH
+echo "mq=" >> $HGRCPATH
 
 echo % init
 hg init a

tests/test-mq-qnew-twice

@@ -1,8 +1,7 b''
 #!/bin/sh
 
-HGRCPATH=$HGTMP/.hgrc; export HGRCPATH
-echo "[extensions]" >> $HGTMP/.hgrc
-echo "mq=" >> $HGTMP/.hgrc
+echo "[extensions]" >> $HGRCPATH
+echo "mq=" >> $HGRCPATH
 
 hg init a
 cd a

tests/test-mq-qrefresh-replace-log-message

@@ -1,9 +1,8 b''
 #!/bin/sh
 
 # Environement setup for MQ
-HGRCPATH=$HGTMP/.hgrc; export HGRCPATH
-echo "[extensions]" >> $HGTMP/.hgrc
-echo "mq=" >> $HGTMP/.hgrc
+echo "[extensions]" >> $HGRCPATH
+echo "mq=" >> $HGRCPATH
 
 #Repo init
 hg init

tests/test-mq-qsave

@@ -1,8 +1,7 b''
 #!/bin/sh
 
-HGRCPATH=$HGTMP/.hgrc; export HGRCPATH
-echo "[extensions]" >> $HGTMP/.hgrc
-echo "mq=" >> $HGTMP/.hgrc
+echo "[extensions]" >> $HGRCPATH
+echo "mq=" >> $HGRCPATH
 
 hg init a
 cd a