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"""
This module keeps commonly used components.
"""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals
import subprocess
import os
import time
class ColorString:
""" Generate colorful strings on terminal """
HEADER = '\033[95m'
BLUE = '\033[94m'
GREEN = '\033[92m'
WARNING = '\033[93m'
FAIL = '\033[91m'
ENDC = '\033[0m'
@staticmethod
def _make_color_str(text, color):
return "".join([color, text.encode('utf-8'), ColorString.ENDC])
@staticmethod
def ok(text):
if ColorString.is_disabled:
return text
return ColorString._make_color_str(text, ColorString.GREEN)
@staticmethod
def info(text):
if ColorString.is_disabled:
return text
return ColorString._make_color_str(text, ColorString.BLUE)
@staticmethod
def header(text):
if ColorString.is_disabled:
return text
return ColorString._make_color_str(text, ColorString.HEADER)
@staticmethod
def error(text):
if ColorString.is_disabled:
return text
return ColorString._make_color_str(text, ColorString.FAIL)
@staticmethod
def warning(text):
if ColorString.is_disabled:
return text
return ColorString._make_color_str(text, ColorString.WARNING)
is_disabled = False
def run_shell_command(shell_cmd, cmd_dir=None):
""" Run a single shell command.
@returns a tuple of shell command return code, stdout, stderr """
if cmd_dir is not None and not os.path.exists(cmd_dir):
run_shell_command("mkdir -p %s" % cmd_dir)
start = time.time()
print("\t>>> Running: " + shell_cmd)
p = subprocess.Popen(shell_cmd,
shell=True,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
cwd=cmd_dir)
stdout, stderr = p.communicate()
end = time.time()
# Report time if we spent more than 5 minutes executing a command
execution_time = end - start
if execution_time > (60 * 5):
mins = (execution_time / 60)
secs = (execution_time % 60)
print("\t>time spent: %d minutes %d seconds" % (mins, secs))
return p.returncode, stdout, stderr
def run_shell_commands(shell_cmds, cmd_dir=None, verbose=False):
""" Execute a sequence of shell commands, which is equivalent to
running `cmd1 && cmd2 && cmd3`
@returns boolean indication if all commands succeeds.
"""
if cmd_dir:
print("\t=== Set current working directory => %s" % cmd_dir)
for shell_cmd in shell_cmds:
ret_code, stdout, stderr = run_shell_command(shell_cmd, cmd_dir)
if stdout:
if verbose or ret_code != 0:
print(ColorString.info("stdout: \n"), stdout)
if stderr:
# contents in stderr is not necessarily to be error messages.
if verbose or ret_code != 0:
print(ColorString.error("stderr: \n"), stderr)
if ret_code != 0:
return False
return True
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