color: support a different color mode when the pager is active
authorGregory Szorc <gregory.szorc@gmail.com>
Wed, 04 Feb 2015 14:11:45 -0800
changeset 24068 4e02418b4236
parent 24067 0baf41e02a4d
child 24069 c6666395fdd2
color: support a different color mode when the pager is active MSYS on Windows has a terminal that supports the "win32" color mode (which "auto" properly detects for us). However, a popularily configured pager in that environment (GNU less) only supports the "ansi" color mode. This patch teaches color about a new config option: pagermode. It behaves like "mode" but is only consulted when the pager is active for the current command. MSYS users can now set "pagermode = ansi" and get a colorful experience that just works. Previously, MSYS users would have to live without color when using GNU less as the pager, would have to manually configure the pager to attend every command, or would have gibberish if "ansi" was used without the pager.
hgext/color.py
--- a/hgext/color.py	Fri Feb 06 12:09:09 2015 -0800
+++ b/hgext/color.py	Wed Feb 04 14:11:45 2015 -0800
@@ -140,6 +140,17 @@
 either using ansi mode (or auto mode), or by using less -r (which will
 pass through all terminal control codes, not just color control
 codes).
+
+On some systems (such as MSYS in Windows), the terminal may support
+a different color mode than the pager (activated via the "pager"
+extension). It is possible to define separate modes depending on whether
+the pager is active::
+
+  [color]
+  mode = auto
+  pagermode = ansi
+
+If ``pagermode`` is not defined, the ``mode`` will be used.
 '''
 
 import os
@@ -213,6 +224,11 @@
     formatted = always or (os.environ.get('TERM') != 'dumb' and ui.formatted())
 
     mode = ui.config('color', 'mode', 'auto')
+
+    # If pager is active, color.pagermode overrides color.mode.
+    if getattr(ui, 'pageractive', False):
+        mode = ui.config('color', 'pagermode', mode)
+
     realmode = mode
     if mode == 'auto':
         if os.name == 'nt':