Mercurial > public > mercurial-scm > hg-stable
diff mercurial/templater.py @ 24966:554d6fcc3c84
templater: strip single backslash before quotation mark in quoted template
db7463aa080f fixed the issue of double escapes, but it made the following
template fail with syntax error because of <\">. Strictly speaking, <\">
appears to be invalid in non-string part, but we are likely to escape <">
if surrounded by quotes, and we are used to write such templates by trial
and error.
[templates]
sl = "{tags % \"{ifeq(tag,'tip','',label('log.tag', ' {tag}'))}\"}"
So, for backward compatibility between 2.8.1 and 3.4, a single backslash
before quotation mark is stripped only in quoted template. We don't care
for <\"> in string literal in quoted template, which never worked as expected
before.
template result
--------- ------------------------
{\"\"} parse error
"{""}" {""} -> <>
"{\"\"}" {""} -> <>
{"\""} {"\""} -> <">
'{"\""}' {"\""} -> <">
"{"\""}" parse error (don't care)
| author | Yuya Nishihara <yuya@tcha.org> |
|---|---|
| date | Fri, 08 May 2015 18:11:26 +0900 |
| parents | 890845af1ac2 |
| children | fd7287f0b43c |
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line diff
--- a/mercurial/templater.py Thu May 07 23:18:48 2015 -0700 +++ b/mercurial/templater.py Fri May 08 18:11:26 2015 +0900 @@ -623,7 +623,21 @@ if quoted: if len(s) < 2 or s[0] != s[-1]: raise SyntaxError(_('unmatched quotes')) - return s[1:-1] + # de-backslash-ify only <\">. it is invalid syntax in non-string part of + # template, but we are likely to escape <"> in quoted string and it was + # accepted before, thanks to issue4290. <\\"> is unmodified because it + # is ambiguous and it was processed as such before 2.8.1. + # + # template result + # --------- ------------------------ + # {\"\"} parse error + # "{""}" {""} -> <> + # "{\"\"}" {""} -> <> + # {"\""} {"\""} -> <"> + # '{"\""}' {"\""} -> <"> + # "{"\""}" parse error (don't care) + q = s[0] + return s[1:-1].replace('\\\\' + q, '\\\\\\' + q).replace('\\' + q, q) return s