Add GAP console session mode (#2211)

* Add GAP console session mode

This is also appropriate for GAP .tst files.

Add `analyse_text` methods for `ScilabLexer` and `GAPConsoleLexer` to
distinguish Scilab and GAP .tst files

* Use explicit name for 'keepends' argument to splitlines

5 files changed, 75 insertions, 5 deletions

diff --git a/pygments/lexers/_mapping.py b/pygments/lexers/_mapping.py
index 577d6645..b87396f9 100644
--- a/pygments/lexers/_mapping.py
+++ b/pygments/lexers/_mapping.py
@@ -168,6 +168,7 @@ LEXERS = {
     'FoxProLexer': ('pygments.lexers.foxpro', 'FoxPro', ('foxpro', 'vfp', 'clipper', 'xbase'), ('*.PRG', '*.prg'), ()),
     'FreeFemLexer': ('pygments.lexers.freefem', 'Freefem', ('freefem',), ('*.edp',), ('text/x-freefem',)),
     'FutharkLexer': ('pygments.lexers.futhark', 'Futhark', ('futhark',), ('*.fut',), ('text/x-futhark',)),
+    'GAPConsoleLexer': ('pygments.lexers.algebra', 'GAP session', ('gap-console', 'gap-repl'), ('*.tst',), ()),
     'GAPLexer': ('pygments.lexers.algebra', 'GAP', ('gap',), ('*.g', '*.gd', '*.gi', '*.gap'), ()),
     'GDScriptLexer': ('pygments.lexers.gdscript', 'GDScript', ('gdscript', 'gd'), ('*.gd',), ('text/x-gdscript', 'application/x-gdscript')),
     'GLShaderLexer': ('pygments.lexers.graphics', 'GLSL', ('glsl',), ('*.vert', '*.frag', '*.geo'), ('text/x-glslsrc',)),
diff --git a/pygments/lexers/algebra.py b/pygments/lexers/algebra.py
index 59072708..058906d6 100644
--- a/pygments/lexers/algebra.py
+++ b/pygments/lexers/algebra.py
@@ -10,11 +10,11 @@
 
 import re
 
-from pygments.lexer import RegexLexer, bygroups, words
+from pygments.lexer import Lexer, RegexLexer, bygroups, do_insertions, words
 from pygments.token import Text, Comment, Operator, Keyword, Name, String, \
-    Number, Punctuation, Whitespace
+    Number, Punctuation, Generic, Whitespace
 
-__all__ = ['GAPLexer', 'MathematicaLexer', 'MuPADLexer', 'BCLexer']
+__all__ = ['GAPLexer', 'GAPConsoleLexer', 'MathematicaLexer', 'MuPADLexer', 'BCLexer']
 
 
 class GAPLexer(RegexLexer):
@@ -88,6 +88,63 @@ class GAPLexer(RegexLexer):
         return min(score, 1.0)
 
 
+class GAPConsoleLexer(Lexer):
+    """
+    For GAP console sessions. Modeled after JuliaConsoleLexer.
+
+    .. versionadded:: 2.14
+    """
+    name = 'GAP session'
+    aliases = ['gap-console', 'gap-repl']
+    filenames = ['*.tst']
+
+    def get_tokens_unprocessed(self, text):
+        gaplexer = GAPLexer(**self.options)
+        start = 0
+        curcode = ''
+        insertions = []
+        output = False
+        error = False
+
+        for line in text.splitlines(keepends=True):
+            if line.startswith('gap> ') or line.startswith('brk> '):
+                insertions.append((len(curcode), [(0, Generic.Prompt, line[:5])]))
+                curcode += line[5:]
+                output = False
+                error = False
+            elif not output and line.startswith('> '):
+                insertions.append((len(curcode), [(0, Generic.Prompt, line[:2])]))
+                curcode += line[2:]
+            else:
+                if curcode:
+                    yield from do_insertions(
+                        insertions, gaplexer.get_tokens_unprocessed(curcode))
+                    curcode = ''
+                    insertions = []
+                if line.startswith('Error, ') or error:
+                    yield start, Generic.Error, line
+                    error = True
+                else:
+                    yield start, Generic.Output, line
+                output = True
+            start += len(line)
+
+        if curcode:
+            yield from do_insertions(
+                insertions, gaplexer.get_tokens_unprocessed(curcode))
+
+    # the following is needed to distinguish Scilab and GAP .tst files
+    def analyse_text(text):
+        # GAP prompts are a dead give away, although hypothetical;y a
+        # file in another language could be trying to compare a variable
+        # "gap" as in "gap> 0.1". But that this should happen at the
+        # start of a line seems unlikely...
+        if re.search(r"^gap> ", text):
+            return 0.9
+        else:
+            return 0.0
+
+
 class MathematicaLexer(RegexLexer):
     """
     Lexer for Mathematica source code.
diff --git a/pygments/lexers/julia.py b/pygments/lexers/julia.py
index 97d9163a..5ac94357 100644
--- a/pygments/lexers/julia.py
+++ b/pygments/lexers/julia.py
@@ -252,7 +252,7 @@ class JuliaConsoleLexer(Lexer):
         output = False
         error = False
 
-        for line in text.splitlines(True):
+        for line in text.splitlines(keepends=True):
             if line.startswith('julia>'):
                 insertions.append((len(curcode), [(0, Generic.Prompt, line[:6])]))
                 curcode += line[6:]
diff --git a/pygments/lexers/make.py b/pygments/lexers/make.py
index d9027f3c..e573d519 100644
--- a/pygments/lexers/make.py
+++ b/pygments/lexers/make.py
@@ -44,7 +44,7 @@ class MakefileLexer(Lexer):
 
     def get_tokens_unprocessed(self, text):
         ins = []
-        lines = text.splitlines(True)
+        lines = text.splitlines(keepends=True)
         done = ''
         lex = BaseMakefileLexer(**self.options)
         backslashflag = False
diff --git a/pygments/lexers/matlab.py b/pygments/lexers/matlab.py
index b70058c5..058661ee 100644
--- a/pygments/lexers/matlab.py
+++ b/pygments/lexers/matlab.py
@@ -3294,3 +3294,15 @@ class ScilabLexer(RegexLexer):
             (r'(\s*)([a-zA-Z_]\w*)', bygroups(Text, Name.Function), '#pop'),
         ],
     }
+
+    # the following is needed to distinguish Scilab and GAP .tst files
+    def analyse_text(text):
+        score = 0.0
+
+        # Scilab comments (don't appear in e.g. GAP code)
+        if re.search(r"^\s*//", text):
+            score += 0.1
+        if re.search(r"^\s*/\*", text):
+            score += 0.1
+
+        return min(score, 1.0)