def _processCommand( command, text, path, cache=True, tmpsuffix="tmp",
tmpprefix="paml_", resolveData=None, allowEmpty=False, cwd=None):
timestamp = has_changed = data = None
cache, is_same, data, cache_key = cacheGet( text, path, cache)
if (not is_same) or (not cache):
if not path or os.path.isdir(path):
temp_created = True
fd, path = tempfile.mkstemp(suffix=tmpsuffix,prefix=tmpprefix)
os.write(fd, engine.ensure_bytes(text))
os.close(fd)
command = command[:-1] + [path]
else:
temp_created = False
# FIXME: Honestly, I have so many problems with popen it's unbelievable.
# I sometimes get sugar to freeze without any reason. I'm keeping the
# following snipped for reference of what not to do.
# ---
# cmd = subprocess.Popen(command, shell=False, stdout=subprocess.PIPE,
# stderr=subprocess.PIPE, cwd=cwd)
# data = cmd.stdout.read()
# error = cmd.stderr.read()
# print (" data", repr(data))
# print (" error", repr(error))
# print ("waiting...")
# cmd.wait()
# ---
# Here the `shell` means single-line comman,d
p = subprocess.Popen(" ".join(command), shell=True,
stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True,
cwd=cwd)
data, error = p.communicate()
# DEBUG:
# If we have a resolveData attribute, we use it to resolve/correct the
# data
if temp_created:
os.unlink(path)
if not data and resolveData:
data = resolveData()
if not data and not allowEmpty:
raise Exception(error or u"No data processing `{0}`".format(u" ".join(command)))
if not temp_created:
# We don't cache temp files. Temp files are only created when
# we don't have a path.
if cache is SIG_CACHE:
cache.set(path,cache_key,data)
assert cache.has(path, cache_key)
elif cache is MEMORY_CACHE:
cache.set(cache_key,data)
assert cache.has(cache_key) == data
assert data is not None, "paml.web._processCommand: None returned by {0}".format(command)
return engine.ensure_unicode(data)
def processSugar( text, path, request=None, cache=True, includeSource=False ):
text = engine.ensure_unicode(text)
if os.path.isdir(path or "."):
parent_path = path or "."
else:
parent_path = os.path.dirname(os.path.abspath(path or "."))
sugar2 = None
# try:
# import sugar2
# except ImportError, e:
# sugar2 = None
# pass
if sugar2:
# If Sugar2 is available, we'll use it
command = sugar2.SugarCommand("sugar2")
arguments = [
"-cljs",
"--cache",
"--include-source" if includeSource else ""
"-L" + parent_path,
"-L" + os.path.join(parent_path, "lib", "sjs"),
path
]
return command.runAsString (arguments), "text/javascript"
else:
# We create a temp dir to cd to, because sugar's DParser
# creates temp files in the current dir.
temp_output = None
if not path:
temp_output = tempfile.mktemp()
path = temp_output
with open(temp_output, "w") as f:
f.write(text.encode("utf-8"))
temp_path = tempfile.mkdtemp()
norm_path = lambda _:os.path.relpath(_, temp_path)
if not os.path.exists(temp_path): os.mkdir(temp_path)
# Otherwise we fallback to the regular Sugar, which has to be
# run through popen (so it's slower)
command = [
getCommands()["sugar"],
"-cSljs" if includeSource else "-cljs",
"-L" + norm_path(parent_path),
"-L" + norm_path(os.path.join(parent_path, "lib", "sjs")),
norm_path(path)
]
res = _processCommand(command, text, path, cache, cwd=temp_path), "text/javascript"
# We clean up the temp dir
if os.path.exists(temp_path): os.rmdir(temp_path)
if temp_output and os.path.exists(temp_output): os.unlink(temp_output)
return res
def cacheGet( text, path, cache ): if cache: if path: cache = SIG_CACHE timestamp = SignatureCache.mtime(path) is_same, data = cache.get(path,timestamp) return cache, is_same, data, timestamp else: text = engine.ensure_unicode(text) sig = hashlib.sha256(bytes(u" ".join(command) + text)).hexdigest() cache = MEMORY_CACHE is_same = cache.has(sig) data = cache.get(sig) return cache, is_same, data, sig else: return cache, False, None, None
