tests/test-convert-cvs-branch

findrenames: Optimise "addremove -s100" by matching files by their SHA1 hashes.

We speed up 'findrenames' for the usecase when a user specifies they
want a similarity of 100% by matching files by their exact SHA1 hash
value. This reduces the number of comparisons required to find exact
matches from O(n^2) to O(n).

While it would be nice if we could just use mercurial's pre-calculated
SHA1 hash for existing files, this hash includes the file's ancestor
information making it unsuitable for our purposes. Instead, we calculate
the hash of old content from scratch.

The following benchmarks were taken on the current head of crew:

addremove 100% similarity:
  rm -rf *; hg up -C; mv tests tests.new
  hg --time addremove -s100 --dry-run

  before:  real 176.350 secs (user 128.890+0.000 sys 47.430+0.000)
  after:   real   2.130 secs (user   1.890+0.000 sys  0.240+0.000)

addremove 75% similarity:
  rm -rf *; hg up -C; mv tests tests.new; \
      for i in tests.new/*; do echo x >> $i; done
  hg --time addremove -s75  --dry-run

  before: real 264.560 secs (user 215.130+0.000 sys 49.410+0.000)
  after:  real 218.710 secs (user 172.790+0.000 sys 45.870+0.000)

#!/bin/sh

# This is http://mercurial.selenic.com/bts/issue1148
#     and http://mercurial.selenic.com/bts/issue1447

"$TESTDIR/hghave" cvs || exit 80

cvscall()
{
    cvs -f "$@"
}

echo "[extensions]" >> $HGRCPATH
echo "convert = " >> $HGRCPATH
echo "graphlog = " >> $HGRCPATH
echo "[convert]" >> $HGRCPATH
echo "cvsps.cache=0" >> $HGRCPATH

echo % create cvs repository
mkdir cvsrepo
cd cvsrepo
CVSROOT=`pwd`
export CVSROOT
CVS_OPTIONS=-f
export CVS_OPTIONS
cd ..

cvscall -q -d "$CVSROOT" init

echo % Create a new project

mkdir src
cd src
echo "1" > a
echo "1" > b
cvscall import -m "init" src v0 r0 | sort
cd ..
cvscall co src
cd src

echo % Branch the project

cvscall tag -b BRANCH
cvscall up -r BRANCH > /dev/null

echo % Modify file a, then b, then a 

echo "2" > a
cvscall ci -m "mod a" | grep '<--' | sed -e 's:.*src/\(.*\),v.*:checking in src/\1,v:g'

echo "2" > b
cvscall ci -m "mod b" | grep '<--' | sed -e 's:.*src/\(.*\),v.*:checking in src/\1,v:g'

echo "3" > a
cvscall ci -m "mod a again" | grep '<--' | sed -e 's:.*src/\(.*\),v.*:checking in src/\1,v:g'

echo % Convert

cd ..
hg convert src | sed -e 's/connecting to.*cvsrepo/connecting to cvsrepo/g'

echo % Check the result

hg -R src-hg glog --template '{rev} ({branches}) {desc} files: {files}\n'

echo ""

echo % issue 1447
cvscall()
{
    echo cvs -f "$@"
    cvs -f "$@"
    sleep 1
}

cvsci()
{
    echo cvs -f ci "$@"
    cvs -f ci "$@" >/dev/null 2>&1
    sleep 1
}

cvscall -Q -d `pwd`/cvsmaster2 init >/dev/null 2>&1
cd cvsmaster2
CVSROOT=`pwd`
export CVSROOT
mkdir foo
cd ..
cvscall -Q co -d cvswork2 foo

cd cvswork2
echo foo > a.txt
echo bar > b.txt
cvscall -Q add a.txt b.txt
cvsci -m "Initial commit"

echo foo > b.txt
cvsci -m "Fix b on HEAD"

echo bar > a.txt
cvsci -m "Small fix in a on HEAD"

cvscall -Q tag -b BRANCH
cvscall -Q up -P -rBRANCH

echo baz > b.txt
cvsci -m "Change on BRANCH in b"

hg debugcvsps -x --parents foo | sed -e 's/Author:.*/Author:/' -e 's/Date:.*/Date:/'

cd ..