Fix hg clone race with writer
Most read operations in hg don't need locks because we order reads and
writes for consistency. Clone is an exception to this as we're copying
entire file histories and could end up with more file history copied
than we have commits.
For now, make clone take a lock on the source repo. Non-hardlinked
clone should eventually be changed to use lockless pull.
A simple testing framework
To run the tests, do:
cd tests/
./run-tests
This finds all scripts in the test directory named test-* and executes
them. The scripts can be either shell scripts or Python. Each test is
run in a temporary directory that is removed when the test is complete.
A test-<x> succeeds if the script returns success and its output
matches test-<x>.out. If the new output doesn't match, it is stored in
test-<x>.err.
There are some tricky points here that you should be aware of when
writing tests:
- hg commit and hg up -m want user interaction
for commit use -m "text"
for hg up -m, set HGMERGE to something noninteractive (like true or merge)
- changeset hashes will change based on user and date which make
things like hg history output change
use commit -m "test" -u test -d "0 0"
- diff will show the current time
use hg diff | sed "s/\(\(---\|+++\) [a-zA-Z0-9_/.-]*\).*/\1/" to strip
dates