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Ignore -- at the top level arg parser (fixes #652)

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This was unintended behavior that was added back for backward
compatibility. It is intentionally undocumented.
This commit is contained in:
Jay Berkenbilt 2022-02-15 15:34:35 -05:00
parent 19608ec151
commit fbd3e56da7
4 changed files with 18 additions and 3 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2022-02-15 Jay Berkenbilt <ejb@ql.org>
* Bug fix: 10.6.0 inadvertently removed an unknown/undocumented
CLI parsing feature, which has been restored in 10.6.2. Fixes #652.
* Don't map 0x18 through 0x1f, 0x7f, 0x9f, or 0xad as fixed points
when transcoding UTF-8 to PDFDoc. These codepoints have different
meanings in those two encoding systems. Fixes #650.

3
libqpdf/QPDFArgParser.cc
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@ -554,8 +554,7 @@ QPDFArgParser::parseArgs()
bool have_parameter = false;
std::string o_arg(arg);
std::string arg_s(arg);
if ((strcmp(arg, "--") == 0) &&
(this->m->option_table != &this->m->main_option_table))
if (strcmp(arg, "--") == 0)
{
// Special case for -- option, which is used to break out
// of subparsers.

5
libqpdf/QPDFJob_argv.cc
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@ -67,6 +67,11 @@ ArgParser::initOptionTables()
this->ap.addFinalCheck([this](){c_main->checkConfiguration();});
// add_help is defined in auto_job_help.hh
add_help(this->ap);
// Special case: ignore -- at the top level. This undocumented
// behavior is for backward compatibility; it was unintentionally
// the case prior to 10.6, and some users were relying on it.
this->ap.selectMainOptionTable();
this->ap.addBare("--", [](){});
}
void

10
qpdf/qtest/qpdf.test
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@ -149,7 +149,7 @@ foreach my $c (@completion_tests)
show_ntests();
# ----------
$td->notify("--- Argument Parsing ---");
$n_tests += 12;
$n_tests += 13;
$td->runtest("required argument",
{$td->COMMAND => "qpdf --password minimal.pdf"},
@ -211,6 +211,14 @@ $td->runtest("duplicated pages password",
{$td->REGEXP => ".*password already specified.*",
$td->EXIT_STATUS => 2},
$td->NORMALIZE_NEWLINES);
# Ignoring -- at the top level was never intended but turned out to
# have been there for a long time so that people relied on it. It is
# intentionally not documented.
$td->runtest("ignore -- at top level",
{$td->COMMAND => "qpdf -- --check -- minimal.pdf --"},
{$td->REGEXP => ".*No syntax or stream encoding errors found.*",
$td->EXIT_STATUS => 0},
$td->NORMALIZE_NEWLINES);
show_ntests();
# ----------