Option to output error messages suitable for automated processing

Enables use of the optimizer as an editor plug-in.

lslopt/lslparse.py

@@ -71,14 +71,22 @@ class EParse(Exception):
     def __init__(self, parser, msg):
         self.errorpos = parser.errorpos
         self.lno, self.cno, self.fname = GetErrLineCol(parser)
-        filename = (self.fname.decode('utf8', 'replace')
+        if parser.emap:
+            filename = parser.filename
+        else:
+            filename = self.fname
+
+        filename = (filename.decode('utf8', 'replace')
                     .replace(u'\\', u'\\\\')
                     .replace(u'"', u'\\"')
                    )
 
-        if parser.processpre and filename != '<stdin>':
-            msg = u"(Line %d char %d): ERROR in \"%s\": %s" % (self.lno,
-                self.cno, filename, msg)
+        if parser.emap:
+            msg = u'::ERROR::"%s":%d:%d: %s' % (
+                any2u(filename.lstrip('u')), self.lno, self.cno, msg)
+        elif parser.processpre and filename != '<stdin>':
+            msg = u"(Line %d char %d): ERROR in \"%s\": %s" % (
+                self.lno, self.cno, filename, msg)
         else:
             msg = u"(Line %d char %d): ERROR: %s" % (self.lno, self.cno, msg)
         super(EParse, self).__init__(msg)
@@ -2862,6 +2870,9 @@ list lazy_list_set(list L, integer i, list v)
         # Inline keyword
         self.enable_inline = 'inline' in options
 
+        # Automated Processing friendly error messages
+        self.emap = 'emap' in options
+
         # Symbol table:
         # This is a list of all local and global symbol tables.
         # The first element (0) is the global scope. Each symbol table is a
@@ -2983,7 +2994,7 @@ list lazy_list_set(list L, integer i, list v)
         finally:
             f.close()
 
-        return self.parse(script, options, lib = lib)
+        return self.parse(script, options, filename, lib)
 
     def __init__(self, lib = None):
         """Initialization of library and lazy compilation.

main.py

@@ -236,6 +236,8 @@ Usage: {progname}
     [--shortname=<name>]      * specify the script's short file name
     [--prettify]                Prettify source file. Disables all -O options.
     [--bom]                     Prefix script with a UTF-8 byte-order mark
+    [--emap]                    Output error messages in a format suitable for
+                                automated processing
     filename                    input file
 
 Options marked with * are used to define the preprocessor macros __AGENTID__,
@@ -403,7 +405,7 @@ def main(argv):
     try:
         opts, args = getopt.gnu_getopt(argv[1:], 'hO:o:p:P:HTyb:L:A:',
             ('optimizer-options=', 'help', 'version', 'output=', 'header',
-            'timestamp', 'python-exceptions', 'prettify', 'bom',
+            'timestamp', 'python-exceptions', 'prettify', 'bom', 'emap',
             'preproc=', 'precmd=', 'prearg=', 'prenodef', 'preshow',
             'avid=', 'avname=', 'assetid=', 'shortname=', 'builtins='
             'libdata=', 'postarg='))
@@ -428,6 +430,7 @@ def main(argv):
     raise_exception = False
     prettify = False
     bom = False
+    emap = False
     builtins = None
     libdata = None
 
@@ -528,6 +531,10 @@ def main(argv):
 
         elif opt == '--bom':
             bom = True
+
+        elif opt == '--emap':
+            emap = True
+
     del opts
 
     if prettify:
@@ -686,6 +693,9 @@ def main(argv):
 
         if not preshow:
 
+            if emap:
+                options.add('emap')
+
             lib = lslopt.lslloadlib.LoadLibrary(builtins, libdata)
             p = parser(lib)
             try: