tests: optimise creating repositories and loading dumps Previously, we'd use svnadmin for creating repositories and loading dumps. That tends to be a bit slow, as it forks a new process and loads the Subversion libraries into it. Instead, we extend our existing Subversion wrappers and load the dumps using the API. This is a noticable speedup. The only downside is that we rely on Subversion and Subvertpy to correctly close all file descriptors; an assumption which hasn't always held in the past. I ran some benchmarks on my relatively slow Mac with $TMPDIR on a ramdisk, and they showed a significant change: I compared ten runs of each with Subvertpy: min: -18.8% (299.1s -> 243.0s) median: -20.0% (307.1s -> 245.6s) ...and three runs of each with SWIG: min: -22.8% (368.7s -> 284.7s) median: -25.7% (384.4s -> 285.5s) (Since the timing measures wall clock time, the minimum time is likely to be the most accurate and useful measurement.)

#!/bin/sh
#
# Generate unrelatedbranch.svndump
#

mkdir temp
cd temp

mkdir project-orig
cd project-orig
mkdir trunk
mkdir branches
cd ..

svnadmin create testrepo
svnurl=file://`pwd`/testrepo
svn import project-orig $svnurl -m "init project"

svn co $svnurl project
cd project/trunk
echo a > a
svn add a
svn ci -m "add a in trunk"
cd ../branches
# Create an unrelated branch with another file. It used to lead the converter
# to think branch1 was a copy of trunk, even without copy information.
mkdir branch1
echo b > branch1/b
svn add branch1
svn ci -m "add b in branch1"
# Make a real branch too for comparison
svn cp ../trunk branch2
echo b > branch2/b
svn add branch2/b
svn ci -m "add b to branch2"
# Add a file in the branch root for fun
echo c > c
svn add c
svn ci -m "add c in branches/"
# Even update it
echo c >> c
svn ci -m "change c"
cd ../..

svnadmin dump testrepo > ../unrelatedbranch.svndump