Ted Zlatanov <t...@lifelogs.com> writes:
> +# build reverse token map
> +my %rmap;
> +foreach my $k (keys %{$options{tmap}}) {
> + push @{$rmap{$options{tmap}->{$k}}}, $k;
> +}
Mental note: "$rmap{foo} -eq 'bar'" means that what Git calls 'bar'
is found as 'foo' in the netrc/authinfo file. Keys in %rmap are
what we expect to read from the netrc/authinfo file.
> +# there are CPAN modules to do this better, but we want to avoid
> +# dependencies and generally, complex netrc-style files are rare
> +
> +if ($debug) {
> + printf STDERR "searching for %s = %s\n", $_, $q{$_} || '(any value)'
> + foreach sort keys %q;
> +}
> +
> +LINE: foreach my $line (@data) {
> +
> + print STDERR "line [$line]\n" if $debug;
> + my @tok;
> + # gratefully stolen from Net::Netrc
> + while (length $line &&
> + $line =~ s/^("((?:[^"]+|\\.)*)"|((?:[^\\\s]+|\\.)*))\s*//) {
> + (my $tok = $+) =~ s/\\(.)/$1/g;
> + push(@tok, $tok);
> + }
> +
> + # skip blank lines, comments, etc.
> + next LINE unless scalar @tok;
> +
> + my %tokens;
> + my $num_port;
> + while (@tok) {
> + my ($k, $v) = (shift @tok, shift @tok);
> + next unless defined $v;
> + next unless exists $options{tmap}->{$k};
> + $tokens{$options{tmap}->{$k}} = $v;
> + $num_port = $v if $k eq 'port' && $v =~ m/^\d+$/;
> + }
So you grabbed one line of input, split them into token pairs, and
built %tokens = ('key Git may want to see' => 'value read from file')
mapping.
> + # for "host X port Y" where Y is an integer (captured by
> + # $num_port above), set the host to "X:Y"
> + $tokens{host} = join(':', $tokens{host}, $num_port)
> + if defined $tokens{host} && defined $num_port;
What happens when 'host' does not exist? netrc/authinfo should be a
stream of SP/HT/LF delimited tokens and 'machine' token (or
'default') begins a new entry, so it would mean the input file is
corrupt if we do not have $tokens{host} when we get here, I think.
Oh, another thing. 'default' is like 'machine' followed by any
machine name, so the above while loop that reads two tokens
pair-wise needs to be aware that 'default' is not followed by a
value. I think the loop will fail to parse this:
default login anonymous password me@home
machine k.org login me password mysecret
> + foreach my $check (sort keys %q) {
Hmph, aren't you checking what you read a bit too early? This is a
valid input:
default
login anonymous
password me@home
machine k.org
login me
password mysecret
but does this loop gives mysecret back to me when asked for
host=k.org and user=me?
> + if (exists $tokens{$check} && defined $q{$check}) {
> + print STDERR "comparing [$tokens{$check}] to
> [$q{$check}] in line [$line]\n" if $debug;
> + next LINE unless $tokens{$check} eq $q{$check};
> + }
> + else {
> + print STDERR "we could not find [$check] but it's OK\n"
> if $debug;
> + }
> + }
I would probably structure this part like this:
%pending = ();
split the whole input into tokens, regardless of lines;
iterate over the tokens {
peek the token
if (it is not "default") {
take (token, value) pair;
} else {
take "default" as token; value does not matter.
}
if (token is "default" or "machine") {
# finished reading one entry and we are
# at the beginning of the next entry.
# see if this entry matches
if (%pending is not empty &&
%pending matches %q) {
found a match; use %pending;
}
# done with that entry. now start a new one.
%pending = ();
}
$pending{token} = value;
}
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