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# Copyright 2020 MongoDB Inc.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
def generate(env, **kwargs):
# Grab the existing decider functions out of the environment
# so we can invoke them when we can't use Git.
base_decider = env.decide_target
if base_decider != env.decide_source:
raise Exception("Decider environment seems broken")
from git import Git
thisRepo = Git(env.Dir("#").abspath)
currentGitState = thisRepo.ls_files("--stage")
lines = currentGitState.split("\n")
file_sha1_map = {}
for line in lines:
line_content = line.split()
file_sha1_map[env.File(line_content[3]).path] = line_content[1]
for m in thisRepo.ls_files("-m").split("\n"):
if m:
del file_sha1_map[env.File(m).path]
def is_known_to_git(dependency):
return str(dependency) in file_sha1_map
def git_says_file_is_up_to_date(dependency, prev_ni):
gitInfoForDep = file_sha1_map[str(dependency)]
if prev_ni is None:
dependency.get_ninfo().csig = gitInfoForDep
return False
if not (hasattr(prev_ni, "csig")):
prev_ni.csig = gitInfoForDep
result = gitInfoForDep == prev_ni.csig
return result
def MongoGitDecider(dependency, target, prev_ni, node):
if not is_known_to_git(dependency):
return base_decider(dependency, target, prev_ni, node)
return not git_says_file_is_up_to_date(dependency, prev_ni)
env.Decider(MongoGitDecider)
def exists(env):
try:
from git import Git
Git(env.Dir("#").abspath).ls_files("--stage")
return True
except:
return False
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