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make shellQuoteWin() be more sparing with circumflexes

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... as newer versions of nmake (and jom, for compatibility) have botched
circumflex processing (they simply don't do it when shortcutting the shell
evaluation).

as a side effect, the output is also more readable if the string contains
quotes.

Change-Id: I0506b59ceecb70da258c482f9973156b2803066d
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>
This commit is contained in:
Oswald Buddenhagen 2014-11-20 10:38:37 +01:00
parent fde33949f4
commit cf38b12a27
2 changed files with 38 additions and 16 deletions
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48
qmake/library/ioutils.cpp
View File

@ -99,12 +99,19 @@ QString IoUtils::resolvePath(const QString &baseDir, const QString &fileName)
return QDir::cleanPath(baseDir + QLatin1Char('/') + fileName);
}
inline static
bool isSpecialChar(ushort c, const uchar (&iqm)[16])
{
if ((c < sizeof(iqm) * 8) && (iqm[c / 8] & (1 << (c & 7))))
return true;
return false;
}
inline static
bool hasSpecialChars(const QString &arg, const uchar (&iqm)[16])
{
for (int x = arg.length() - 1; x >= 0; --x) {
ushort c = arg.unicode()[x].unicode();
if ((c < sizeof(iqm) * 8) && (iqm[c / 8] & (1 << (c & 7))))
if (isSpecialChar(arg.unicode()[x].unicode(), iqm))
return true;
}
return false;
@ -140,23 +147,38 @@ QString IoUtils::shellQuoteWin(const QString &arg)
0xff, 0xff, 0xff, 0xff, 0x45, 0x13, 0x00, 0x78,
0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x10
};
// Shell meta chars that need escaping.
static const uchar ism[] = {
0x00, 0x00, 0x00, 0x00, 0x40, 0x03, 0x00, 0x50,
0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x10
}; // &()<>^|
if (!arg.length())
return QString::fromLatin1("\"\"");
QString ret(arg);
if (hasSpecialChars(ret, iqm)) {
// Quotes are escaped and their preceding backslashes are doubled.
// It's impossible to escape anything inside a quoted string on cmd
// level, so the outer quoting must be "suspended".
ret.replace(QRegExp(QLatin1String("(\\\\*)\"")), QLatin1String("\"\\1\\1\\^\"\""));
// The argument must not end with a \ since this would be interpreted
// as escaping the quote -- rather put the \ behind the quote: e.g.
// rather use "foo"\ than "foo\"
int i = ret.length();
while (i > 0 && ret.at(i - 1) == QLatin1Char('\\'))
--i;
ret.insert(i, QLatin1Char('"'));
// The process-level standard quoting allows escaping quotes with backslashes (note
// that backslashes don't escape themselves, unless they are followed by a quote).
// Consequently, quotes are escaped and their preceding backslashes are doubled.
ret.replace(QRegExp(QLatin1String("(\\\\*)\"")), QLatin1String("\\1\\1\\\""));
// Trailing backslashes must be doubled as well, as they are followed by a quote.
ret.replace(QRegExp(QLatin1String("(\\\\+)$")), QLatin1String("\\1\\1"));
// However, the shell also interprets the command, and no backslash-escaping exists
// there - a quote always toggles the quoting state, but is nonetheless passed down
// to the called process verbatim. In the unquoted state, the circumflex escapes
// meta chars (including itself and quotes), and is removed from the command.
bool quoted = true;
for (int i = 0; i < ret.length(); i++) {
QChar c = ret.unicode()[i];
if (c.unicode() == '"')
quoted = !quoted;
else if (!quoted && isSpecialChar(c.unicode(), ism))
ret.insert(i++, QLatin1Char('^'));
}
if (!quoted)
ret.append(QLatin1Char('^'));
ret.append(QLatin1Char('"'));
ret.prepend(QLatin1Char('"'));
}
return ret;

6
tests/auto/tools/qmake/testdata/functions/functions.pro vendored
View File

@ -156,9 +156,9 @@ testReplace($$relative_path("/fake/trolls", "/fake/path"), "../trolls", "relativ
testReplace($$relative_path(""), "", "relative_path of empty")
#this test is very rudimentary. the backend function is thoroughly tested in qt creator
in = "some nasty\" path\\"
out_cmd = "\"some nasty\"\\^\"\" path\"\\"
out_sh = "'some nasty\" path\\'"
in = "some nasty & ugly\" path & thing\\"
out_cmd = "\"some nasty & ugly\\\" path ^& thing\\\\^\""
out_sh = "'some nasty & ugly\" path & thing\\'"
equals(QMAKE_HOST.os, Windows): \
out = $$out_cmd
else: \