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# Copyright(c) 2009-2010, Gentoo Foundation
#
# Licensed under the GNU General Public License, v2 or higher
#
# $Header: $
"""Displays the ChangeLog entry for the latest installable version of an atom"""
# Move to Imports sections when Python 2.6 is stable
from __future__ import with_statement
__docformat__ = 'epytext'
# =======
# Imports
# =======
import os
import sys
from getopt import gnu_getopt, GetoptError
import gentoolkit.pprinter as pp
from gentoolkit import errors
from gentoolkit.atom import Atom
from gentoolkit.equery import format_options, mod_usage
from gentoolkit.helpers import ChangeLog, find_best_match, find_packages
# =======
# Globals
# =======
QUERY_OPTS = {
'onlyLatest': False,
'showFullLog': False,
'limit': None,
'from': None,
'to': None
}
# =========
# Functions
# =========
def print_help(with_description=True):
"""Print description, usage and a detailed help message.
@type with_description: bool
@param with_description: if true, print module's __doc__ string
"""
if with_description:
print __doc__.strip()
print
print mod_usage(mod_name="changes")
print
print pp.emph("examples")
print (" c portage # show latest visible "
"version's entry")
print " c portage --full --limit=3 # show 3 latest entries"
print " c '=sys-apps/portage-2.1.6*' # use atom syntax"
print " c portage --from=2.2_rc20 --to=2.2_rc30 # use version ranges"
print
print pp.command("options")
print format_options((
(" -h, --help", "display this help message"),
(" -l, --latest", "display only the latest ChangeLog entry"),
(" -f, --full", "display the full ChangeLog"),
(" --limit=NUM",
"limit the number of entries displayed (with --full)"),
(" --from=VER", "set which version to display from"),
(" --to=VER", "set which version to display to"),
))
def get_match(query):
"""Find a valid package from which to get the ChangeLog path.
@raise GentoolkitNoMatches: if no matches found
"""
match = matches = None
match = find_best_match(query)
if not match:
matches = find_packages(query, include_masked=True)
else:
matches = [match]
if not matches:
raise errors.GentoolkitNoMatches(query)
return matches[0]
def is_ranged(atom):
"""Return True if an atom string appears to be ranged, else False."""
return atom.startswith(('~', '<', '>')) or atom.endswith('*')
def parse_module_options(module_opts):
"""Parse module options and update QUERY_OPTS"""
opts = (x[0] for x in module_opts)
posargs = (x[1] for x in module_opts)
for opt, posarg in zip(opts, posargs):
if opt in ('-h', '--help'):
print_help()
sys.exit(0)
elif opt in ('-f', '--full'):
QUERY_OPTS['showFullLog'] = True
elif opt in ('-l', '--latest'):
QUERY_OPTS['onlyLatest'] = True
elif opt in ('--limit',):
set_limit(posarg)
elif opt in ('--from',):
QUERY_OPTS['from'] = posarg
elif opt in ('--to',):
QUERY_OPTS['to'] = posarg
def print_entries(entries):
"""Print entries and strip trailing whitespace from the last entry."""
len_entries = len(entries)
for i, entry in enumerate(entries): # , start=1): in py2.6
i += 1
if i < len_entries:
print entry
else:
print entry.strip()
def set_limit(posarg):
"""Set a limit in QUERY_OPTS on how many ChangeLog entries to display.
Die if posarg is not an integer.
"""
if posarg.isdigit():
QUERY_OPTS['limit'] = int(posarg)
else:
err = "Module option --limit requires integer (got '%s')"
sys.stderr.write(pp.error(err % posarg))
print
print_help(with_description=False)
sys.exit(2)
def main(input_args):
"""Parse input and run the program"""
short_opts = "hlf"
long_opts = ('help', 'full', 'from=', 'latest', 'limit=', 'to=')
try:
module_opts, queries = gnu_getopt(input_args, short_opts, long_opts)
except GetoptError, err:
sys.stderr.write(pp.error("Module %s" % err))
print
print_help(with_description=False)
sys.exit(2)
parse_module_options(module_opts)
if not queries:
print_help()
sys.exit(2)
first_run = True
for query in queries:
if not first_run:
print
match = get_match(query)
changelog_path = os.path.join(match.package_path(), 'ChangeLog')
changelog = ChangeLog(changelog_path)
#
# Output
#
if (QUERY_OPTS['onlyLatest'] or (
changelog.entries and not changelog.indexed_entries
)):
print changelog.latest.strip()
else:
end = QUERY_OPTS['limit'] or len(changelog.indexed_entries)
if QUERY_OPTS['to'] or QUERY_OPTS['from']:
print_entries(
changelog.entries_matching_range(
from_ver=QUERY_OPTS['from'],
to_ver=QUERY_OPTS['to']
)[:end]
)
elif QUERY_OPTS['showFullLog']:
print_entries(changelog.full[:end])
else:
# Raises GentoolkitInvalidAtom here if invalid
atom = Atom(query) if is_ranged(query) else '=' + str(match.cpv)
print_entries(changelog.entries_matching_atom(atom)[:end])
first_run = False
# vim: set ts=4 sw=4 tw=79:
|
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