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Change the size of the short hash representation...
Change the size of the short hash representation -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Change the size of the short hash representation First note that this number doesn't really matter, as we always check for ambiguous short hash ids. Here's the math on collision probability: >>> import math >>> def p(f, n): return 1 - (1 / math.exp(n**2/(2*f))) ... >>> p(2**32, 30000.0) 0.09947179164613551 # with 30000 changesets (BKCVS), we have a 9% chance >>> p(2**32, 65000.0) 0.38850881217977273 # and with a full import from BK, we'd have a 39% chance >>> p(2**40, 1e6) 0.36539171908447321 # we'd like to be "safe" for 1M csets, so 40 isn't enough >>> p(2**48, 1e6) 0.001774780051374103 # But 48 looks good >>> p(2**48, 1e7) 0.16275260939624481 >>> p(2**48, 5e6) 0.043437281083569146 >>> p(2**48, 2e6) 0.0070802434913129764 >>> p(2**48, 3e6) 0.01586009440574343 manifest hash: 24d9f928a463f46708b0e11fb781d5a241851424 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (GNU/Linux) iD8DBQFCsQoMywK+sNU5EO8RAoBBAJwII9GV6dT9QUOYAk3gZGw9z0JvjACfSI4q IFnTu1F7P5OuLelO1GsM8Bs= =CNWk -----END PGP SIGNATURE-----
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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 -t "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 -t "test" -u test -d "0 0"
- diff will show the current time
use hg diff | sed "s/\(\(---\|+++\).*\)\t.*/\1/" to strip dates
- set -x and pipelines don't generate stable output
turn off set -x or break pipelines into pieces