Fix and re-enable htmlreport tests (#2310)

* htmlreport/check.sh: Remove check with obsolete file

gui/test/data/xmlfiles/xmlreport_v1.xml has been removed with commit
d95efc44c7

* .travis.yml: Enable htmlreport test again

* cppcheck-htmlreport: Fall back to guessing lexer from file content

If the lexer can not be guessed from the file extension (for example
for *.tpp) then guess the lexer that should be used from the content.
This fixes "ERROR: *" output when running "htmlreport/check.sh"
Also use specific exceptions instead of bare ones.

.travis.yml

@@ -69,12 +69,11 @@ matrix:
         - make validateXML
 # Validate rule files
         - make validateRules
-# note: trusty on travis has python pygments disabled so disable these tests on travis
-## check htmlreport stuff
-#  - ./htmlreport/test_htmlreport.py
-#  - cd htmlreport
-#  - ./check.sh
-#  - cd ../
+# check htmlreport stuff
+        - ./htmlreport/test_htmlreport.py
+        - cd htmlreport
+        - ./check.sh
+        - cd ../
 # check if DESTDIR works  TODO: actually execute this
         - mkdir install_test
         - echo $CXXFLAGS

htmlreport/check.sh

@@ -1,7 +1,6 @@
 #!/bin/bash -ex
 
 
-./cppcheck-htmlreport --file ../gui/test/data/xmlfiles/xmlreport_v1.xml --title "xml1 test" --report-dir . --source-dir ../test/
 ./cppcheck-htmlreport --file ../gui/test/data/xmlfiles/xmlreport_v2.xml --title "xml2 test" --report-dir . --source-dir ../test/
 echo -e "\n"
 

htmlreport/cppcheck-htmlreport

@@ -10,8 +10,9 @@ import operator
 
 from collections import Counter
 from pygments import highlight
-from pygments.lexers import guess_lexer_for_filename
+from pygments.lexers import guess_lexer, guess_lexer_for_filename
 from pygments.formatters import HtmlFormatter
+from pygments.util import ClassNotFound
 from xml.sax import parse as xml_parse
 from xml.sax import SAXParseException as XmlParseException
 from xml.sax.handler import ContentHandler as XmlContentHandler
@@ -523,11 +524,14 @@ if __name__ == '__main__':
             output_file.write(HTML_HEAD_END)
             try:
                 lexer = guess_lexer_for_filename(source_filename, '')
-            except:
-                sys.stderr.write("ERROR: Couldn't determine lexer for the file' " + source_filename + " '. Won't be able to syntax highlight this file.")
-                output_file.write("\n <tr><td colspan='5'> Could not generated content because pygments failed to retrieve the determine code type.</td></tr>")
-                output_file.write("\n <tr><td colspan='5'> Sorry about this.</td></tr>")
-                continue
+            except ClassNotFound:
+                try:
+                    lexer = guess_lexer(content)
+                except ClassNotFound:
+                    sys.stderr.write("ERROR: Couldn't determine lexer for the file' " + source_filename + " '. Won't be able to syntax highlight this file.")
+                    output_file.write("\n <tr><td colspan='5'> Could not generated content because pygments failed to retrieve the determine code type.</td></tr>")
+                    output_file.write("\n <tr><td colspan='5'> Sorry about this.</td></tr>")
+                    continue
 
             if options.source_encoding:
                 lexer.encoding = options.source_encoding