[PATCH 2 of 2] template: filter to fill to terminal width (issue5395)

[Simon Farnsworth]

# HG changeset patch
# User Simon Farnsworth <simonfar at fb.com>
# Date 1475841473 -7200
#      Fri Oct 07 13:57:53 2016 +0200
# Node ID ad9be6bb981ca5dccdd4d64dd682e0cba780067b
# Parent  5831f8daf49f2eabe5b7e6ba0f3da1fc61b5ed09
template: filter to fill to terminal width (issue5395)

We can fill to various sizes - terminal width is also useful

diff --git a/mercurial/templatefilters.py b/mercurial/templatefilters.py
--- a/mercurial/templatefilters.py
+++ b/mercurial/templatefilters.py
@@ -165,6 +165,11 @@
     """Any text. Wraps the text to fit in 76 columns."""
     return fill(text, 76)
 
+ at templatefilter('fillterminal')
+def fillterminal(text):
+    """Any text. Wraps the text to fit in the terminal."""
+    return fill(text, util.termwidth())
+
 @templatefilter('firstline')
 def firstline(text):
     """Any text. Returns the first line of text."""
diff --git a/tests/test-command-template.t b/tests/test-command-template.t
--- a/tests/test-command-template.t
+++ b/tests/test-command-template.t
@@ -3213,6 +3213,15 @@
   $ hg log -l1 -T '{fill(desc, date, "", "")}\n'
   hg: parse error: fill expects an integer width
   [255]
+  $ COLUMNS=5 hg log -l1 --template '{fillterminal(desc)}'
+  desc
+  to be
+  wrapp
+  ed
+  desc
+  to be
+  wrapp
+  ed (no-eol)
 
   $ hg log -l 1 --template '{sub(r"[0-9]", "-", author)}'
   {node|short} (no-eol)