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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
import os
import subprocess
import sys
# This is a collection of helper functions that use the subprocess.run
# command to execute commands. In the future, if we have cases where
# we find common python functionality in utilizing the data returned
# from these functions, that functionality can live here for easy reuse
# between other python scripts in dom/media/webrtc/third_party_build.
# must run 'hg' with HGPLAIN=1 to ensure aliases don't interfere with
# command output.
env = os.environ.copy()
env["HGPLAIN"] = "1"
def run_hg(cmd):
cmd_list = cmd.split(" ")
res = subprocess.run(
cmd_list,
capture_output=True,
text=True,
env=env,
)
if res.returncode != 0:
print(
"Hit return code {} running '{}'. Aborting.".format(res.returncode, cmd),
file=sys.stderr,
)
print(res.stderr)
sys.exit(1)
stdout = res.stdout.strip()
return [] if len(stdout) == 0 else stdout.split("\n")
def run_git(cmd, working_dir):
cmd_list = cmd.split(" ")
res = subprocess.run(
cmd_list,
capture_output=True,
text=True,
cwd=working_dir,
)
if res.returncode != 0:
print(
"Hit return code {} running '{}'. Aborting.".format(res.returncode, cmd),
file=sys.stderr,
)
print(res.stderr)
sys.exit(1)
stdout = res.stdout.strip()
return [] if len(stdout) == 0 else stdout.split("\n")
def run_shell(cmd, capture_output=True):
res = subprocess.run(
cmd,
shell=True,
capture_output=capture_output,
text=True,
)
if res.returncode != 0:
print(
"Hit return code {} running '{}'. Aborting.".format(res.returncode, cmd),
file=sys.stderr,
)
if capture_output:
print(res.stderr)
sys.exit(1)
output_lines = []
if capture_output:
stdout = res.stdout.strip()
output_lines = [] if len(stdout) == 0 else stdout.split("\n")
return output_lines
def get_last_line(file_path):
# technique from https://stackoverflow.com/questions/46258499/how-to-read-the-last-line-of-a-file-in-python
with open(file_path, "rb") as f:
try: # catch OSError in case of a one line file
f.seek(-2, os.SEEK_END)
while f.read(1) != b"\n":
f.seek(-2, os.SEEK_CUR)
except OSError:
f.seek(0)
return f.readline().decode().strip()
def update_resume_state(state, resume_state_filename):
with open(resume_state_filename, "w") as ofile:
ofile.write(state)
ofile.write("\n")
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