view tests/printenv.py @ 27275:f2cd240f2f7c

ui: add a 'deprecwarn' helper to issue deprecation warnings As discussed on the list, we are adding an official way to keep old API around for a short time in order to help third party developer to catch up. The deprecated API will issue developer warning (issued by default during test runs) to warn extensions authors that they need to upgrade their code without instantaneously breaking tool chains and normal users. The version is passed as an explicit argument so that developer think about it and a potential future script can automatically check for it. This is not build as a decorator because accessing the 'ui' instance will likely be different each time. The message is also free form because deprecated API are replaced in a variety of ways. I'm not super happy about the final rendering of that message, but this is a developer oriented warning and I would like to move forward.
author Pierre-Yves David <pierre-yves.david@fb.com>
date Sat, 05 Dec 2015 23:05:49 -0800
parents a372f7b4463b
children 036787c10b16
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#!/usr/bin/env python
#
# simple script to be used in hooks
#
# put something like this in the repo .hg/hgrc:
#
#     [hooks]
#     changegroup = python "$TESTDIR/printenv.py" <hookname> [exit] [output]
#
#   - <hookname> is a mandatory argument (e.g. "changegroup")
#   - [exit] is the exit code of the hook (default: 0)
#   - [output] is the name of the output file (default: use sys.stdout)
#              the file will be opened in append mode.
#
import os
import sys

try:
    import msvcrt
    msvcrt.setmode(sys.stdin.fileno(), os.O_BINARY)
    msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY)
    msvcrt.setmode(sys.stderr.fileno(), os.O_BINARY)
except ImportError:
    pass

exitcode = 0
out = sys.stdout

name = sys.argv[1]
if len(sys.argv) > 2:
    exitcode = int(sys.argv[2])
    if len(sys.argv) > 3:
        out = open(sys.argv[3], "ab")

# variables with empty values may not exist on all platforms, filter
# them now for portability sake.
env = [(k, v) for k, v in os.environ.iteritems()
       if k.startswith("HG_") and v]
env.sort()

out.write("%s hook: " % name)
if os.name == 'nt':
    filter = lambda x: x.replace('\\', '/')
else:
    filter = lambda x: x
vars = ["%s=%s" % (k, filter(v)) for k, v in env]
out.write(" ".join(vars))
out.write("\n")
out.close()

sys.exit(exitcode)