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#
# Copyright (C) 2016-2019 by Razvan Radulescu, Nathan Lovato, and contributors
#
# This file is part of Power Sequencer.
#
# Power Sequencer is free software: you can redistribute it and/or modify it under the terms of the
# GNU General Public License as published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# Power Sequencer is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
# without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with Power Sequencer. If
# not, see <https://www.gnu.org/licenses/>.
#
from collections import deque
from shutil import which
class BSError(Exception):
"""
Custom Exception raised if Blender is called with a python script argument
and gives error while trying to execute the script.
"""
pass
class ToolError(Exception):
"""Raised if external dependencies aren't found on system.
"""
pass
def checktools(tools):
tools = [(t, which(t) or "") for t in tools]
check = {"tools": tools, "test": all(map(lambda x: x[1], tools))}
if not check["test"]:
msg = ["BPSRender couldn't find external dependencies:"]
msg += [
"[{check}] {tool}: {path}".format(
check="v" if path != "" else "X", tool=tool, path=path or "NOT FOUND"
)
for tool, path in check["tools"]
]
msg += [
(
"Check if you have them properly installed and available in the PATH"
" environemnt variable."
),
"Exiting...",
]
raise ToolError("\n".join(msg))
def checkblender(what, search, cp, s):
"""
IMPURE
Check Blender output for python script execution error.
Parameters
----------
what: str
A tag used in the exception message.
search: iter(str)
One or more string(s) to search for in Blender's output.
cp: Popen
Blender subprocess.
s: PIPE
Blender's output.
Returns
-------
out: PIPE
The same pipe `s` is returned so that it can be iterated over on later
steps.
"""
if not isinstance(search, list):
search = [search]
for search_item in search:
if search_item in s:
message = (
"Script {what} was not properly executed in" " Blender".format(what=what),
"CMD: {cmd}".format(what=what, cmd=" ".join(cp.args)),
"DUMP:".format(what=what),
s,
)
raise BSError("\n".join(message))
return s
def printw(cfg, text, s="\n", e="...", p="", **kwargs):
p = p or cfg["pre"]["work"]
print("{s}{p} {}{e}".format(text, s=s, e=e, p=p), **kwargs)
def printd(cfg, text, s="", e=".", p="", **kwargs):
p = p or cfg["pre"]["done"]
printw(cfg, text, s=s, e=e, p=p, **kwargs)
def prints(cfg, text, s="", e=".", p="", **kwargs):
p = p or cfg["pre"]["skip"]
printw(cfg, text, s=s, e=e, p=p, **kwargs)
def kickstart(it):
deque(it, maxlen=0)
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