- bugfix: reenable python parsers by turning simple mappings into lists

- robustness: precheck to disable parsers quickly when their dependencies are not found

snafulib/parsers/java.py

@@ -3,6 +3,12 @@
 import os
 import subprocess
 
+def precheck():
+	r = subprocess.run("java 2>/dev/null", shell=True)
+	if r.returncode == 127:
+		return False
+	return True
+
 def activatefile(self, source, convention, SnafuFunctionSource):
 	if not os.path.isfile("snafulib/executors/java/JavaExec.class"):
 		pwd = os.getcwd()

snafulib/snafu.py

@@ -147,14 +147,19 @@ def __init__(self, quiet=False):
 		self.configpath = None
 
 	def setupparsers(self, parsers):
-		if not self.quiet:
-			for parser in parsers:
-				print("+ parser:", parser)
-
 		self.parsermods = []
 		for parser in parsers:
 			mod = importlib.import_module("snafulib.parsers." + parser)
-			self.parsermods.append(mod)
+			if "precheck" in dir(mod):
+				ok = mod.precheck()
+				if not self.quiet:
+					print("+ parser: {} ({})".format(parser, ("forced-disabled", "ok")[ok]))
+				if ok:
+					self.parsermods.append(mod)
+			else:
+				if not self.quiet:
+					print("+ parser: {}".format(parser))
+				self.parsermods.append(mod)
 
 	def setupexecutors(self, executors):
 		if not self.quiet:
@@ -410,6 +415,8 @@ def activate(self, sources, convention, ignore=False):
 				handled = False
 				needshandling = False
 				for suffixkey, suffixvalues in parsermapping.items():
+					if type(suffixvalues) != list:
+						suffixvalues = [suffixvalues]
 					for suffixvalue in suffixvalues:
 						if source.endswith("." + suffixvalue):
 							needshandling = True