Add backslash-continuation support to console lexer.

Fixes #1237

2 files changed, 29 insertions, 2 deletions

diff --git a/pygments/lexers/shell.py b/pygments/lexers/shell.py
index b9368ade..ae790b9e 100644
--- a/pygments/lexers/shell.py
+++ b/pygments/lexers/shell.py
@@ -137,11 +137,15 @@ class ShellSessionBaseLexer(Lexer):
         pos = 0
         curcode = ''
         insertions = []
+        backslash_continuation = False
 
         for match in line_re.finditer(text):
             line = match.group()
             m = re.match(self._ps1rgx, line)
-            if m:
+            if backslash_continuation:
+                curcode += line
+                backslash_continuation = curcode.endswith('\\\n')
+            elif m:
                 # To support output lexers (say diff output), the output
                 # needs to be broken by prompts whenever the output lexer
                 # changes.
@@ -151,10 +155,12 @@ class ShellSessionBaseLexer(Lexer):
                 insertions.append((len(curcode),
                                    [(0, Generic.Prompt, m.group(1))]))
                 curcode += m.group(2)
+                backslash_continuation = curcode.endswith('\\\n')
             elif line.startswith(self._ps2):
                 insertions.append((len(curcode),
                                    [(0, Generic.Prompt, line[:len(self._ps2)])]))
                 curcode += line[len(self._ps2):]
+                backslash_continuation = curcode.endswith('\\\n')
             else:
                 if insertions:
                     toks = innerlexer.get_tokens_unprocessed(curcode)
diff --git a/tests/test_shell.py b/tests/test_shell.py
index 76065caa..6faac9fd 100644
--- a/tests/test_shell.py
+++ b/tests/test_shell.py
@@ -10,7 +10,7 @@
 import unittest
 
 from pygments.token import Token
-from pygments.lexers import BashLexer
+from pygments.lexers import BashLexer, BashSessionLexer
 
 
 class BashTest(unittest.TestCase):
@@ -119,3 +119,24 @@ class BashTest(unittest.TestCase):
         ]
         self.assertEqual(tokens, list(self.lexer.get_tokens(fragment)))
 
+class BashSessionTest(unittest.TestCase):
+
+    def setUp(self):
+        self.lexer = BashSessionLexer()
+        self.maxDiff = None
+
+    def testNeedsName(self):
+        fragment = u'$ echo \\\nhi\nhi\n'
+        tokens = [
+            (Token.Text, u''),
+            (Token.Generic.Prompt, u'$'),
+            (Token.Text, u' '),
+            (Token.Name.Builtin, u'echo'),
+            (Token.Text, u' '),
+            (Token.Literal.String.Escape, u'\\\n'),
+            (Token.Text, u'hi'),
+            (Token.Text, u'\n'),
+            (Token.Generic.Output, u'hi\n'),
+        ]
+        self.assertEqual(tokens, list(self.lexer.get_tokens(fragment)))
+