mirror of https://github.com/git/git.git
gitweb: make hash size independent
Gitweb has several hard-coded 40 values throughout it to check for values that are passed in or acquired from Git. To simplify the code, introduce a regex variable that matches either exactly 40 or exactly 64 hex characters, and use this variable anywhere we would have previously hard-coded a 40 in a regex. Add some helper functions which allow us to write tighter regexes that match exactly the number of hex characters we're expecting. Similarly, switch the code that looks for deleted diffinfo information to look for either 40 or 64 zeros, and update one piece of code to use this function. Finally, when formatting a log line, allow an abbreviated describe output to contain up to 64 characters. Helped-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
brian m. carlson
Junio C Hamano
parent
bcbb44ba05
commit
cfb049119c
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@ -788,6 +788,38 @@ sub check_loadavg {
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# ======================================================================
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# input validation and dispatch
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# Various hash size-related values.
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my $sha1_len = 40;
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my $sha256_extra_len = 24;
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my $sha256_len = $sha1_len + $sha256_extra_len;
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# A regex matching $len hex characters. $len may be a range (e.g. 7,64).
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sub oid_nlen_regex {
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my $len = shift;
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my $hchr = qr/[0-9a-fA-F]/;
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return qr/(?:(?:$hchr){$len})/;
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}
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# A regex matching two sets of $nlen hex characters, prefixed by the literal
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# string $prefix and with the literal string $infix between them.
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sub oid_nlen_prefix_infix_regex {
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my $nlen = shift;
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my $prefix = shift;
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my $infix = shift;
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my $rx = oid_nlen_regex($nlen);
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return qr/^\Q$prefix\E$rx\Q$infix\E$rx$/;
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}
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# A regex matching a valid object ID.
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our $oid_regex;
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{
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my $x = oid_nlen_regex($sha1_len);
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my $y = oid_nlen_regex($sha256_extra_len);
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$oid_regex = qr/(?:$x(?:$y)?)/;
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}
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# input parameters can be collected from a variety of sources (presently, CGI
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# and PATH_INFO), so we define an %input_params hash that collects them all
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# together during validation: this allows subsequent uses (e.g. href()) to be
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@ -1516,7 +1548,7 @@ sub is_valid_refname {
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return undef unless defined $input;
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# textual hashes are O.K.
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if ($input =~ m/^[0-9a-fA-F]{40}$/) {
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if ($input =~ m/^$oid_regex$/) {
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return 1;
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}
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# it must be correct pathname
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@ -2028,6 +2060,9 @@ sub file_type_long {
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sub format_log_line_html {
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my $line = shift;
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# Potentially abbreviated OID.
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my $regex = oid_nlen_regex("7,64");
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$line = esc_html($line, -nbsp=>1);
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$line =~ s{
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\b
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@ -2037,10 +2072,10 @@ sub format_log_line_html {
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(?<!-) # see strbuf_check_tag_ref(). Tags can't start with -
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[A-Za-z0-9.-]+
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(?!\.) # refs can't end with ".", see check_refname_format()
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-g[0-9a-fA-F]{7,40}
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-g$regex
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# Just a normal looking Git SHA1
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[0-9a-fA-F]{7,40}
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$regex
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)
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\b
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}{
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@ -2286,7 +2321,8 @@ sub format_extended_diff_header_line {
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')</span>';
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}
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# match <hash>
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if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
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if ($line =~ oid_nlen_prefix_infix_regex($sha1_len, "index ", ",") |
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$line =~ oid_nlen_prefix_infix_regex($sha256_len, "index ", ",")) {
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# can match only for combined diff
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$line = 'index ';
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for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
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@ -2308,7 +2344,8 @@ sub format_extended_diff_header_line {
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$line .= '0' x 7;
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}
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} elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
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} elsif ($line =~ oid_nlen_prefix_infix_regex($sha1_len, "index ", "..") |
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$line =~ oid_nlen_prefix_infix_regex($sha256_len, "index ", "..")) {
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# can match only for ordinary diff
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my ($from_link, $to_link);
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if ($from->{'href'}) {
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@ -2834,7 +2871,7 @@ sub git_get_hash_by_path {
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}
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#'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa panic.c'
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$line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
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$line =~ m/^([0-9]+) (.+) ($oid_regex)\t/;
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if (defined $type && $type ne $2) {
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# type doesn't match
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return undef;
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@ -3333,7 +3370,7 @@ sub git_get_references {
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while (my $line = <$fd>) {
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chomp $line;
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if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
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if ($line =~ m!^($oid_regex)\srefs/($type.*)$!) {
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if (defined $refs{$1}) {
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push @{$refs{$1}}, $2;
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} else {
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@ -3407,7 +3444,7 @@ sub parse_tag {
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$tag{'id'} = $tag_id;
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while (my $line = <$fd>) {
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chomp $line;
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if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
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if ($line =~ m/^object ($oid_regex)$/) {
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$tag{'object'} = $1;
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} elsif ($line =~ m/^type (.+)$/) {
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$tag{'type'} = $1;
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@ -3451,15 +3488,15 @@ sub parse_commit_text {
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}
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my $header = shift @commit_lines;
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if ($header !~ m/^[0-9a-fA-F]{40}/) {
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if ($header !~ m/^$oid_regex/) {
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return;
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}
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($co{'id'}, my @parents) = split ' ', $header;
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while (my $line = shift @commit_lines) {
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last if $line eq "\n";
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if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
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if ($line =~ m/^tree ($oid_regex)$/) {
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$co{'tree'} = $1;
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} elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
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} elsif ((!defined $withparents) && ($line =~ m/^parent ($oid_regex)$/)) {
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push @parents, $1;
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} elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
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$co{'author'} = to_utf8($1);
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@ -3591,7 +3628,7 @@ sub parse_difftree_raw_line {
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# ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M ls-files.c'
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# ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M rev-tree.c'
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if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
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if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ($oid_regex) ($oid_regex) (.)([0-9]{0,3})\t(.*)$/) {
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$res{'from_mode'} = $1;
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$res{'to_mode'} = $2;
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$res{'from_id'} = $3;
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@ -3606,7 +3643,7 @@ sub parse_difftree_raw_line {
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}
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# '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
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# combined diff (for merge commit)
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elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
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elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:$oid_regex )+)([a-zA-Z]+)\t(.*)$//) {
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$res{'nparents'} = length($1);
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$res{'from_mode'} = [ split(' ', $2) ];
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$res{'to_mode'} = pop @{$res{'from_mode'}};
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@ -3616,7 +3653,7 @@ sub parse_difftree_raw_line {
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$res{'to_file'} = unquote($5);
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}
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# 'c512b523472485aef4fff9e57b229d9d243c967f'
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elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
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elsif ($line =~ m/^($oid_regex)$/) {
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$res{'commit'} = $1;
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}
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@ -3644,7 +3681,7 @@ sub parse_ls_tree_line {
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if ($opts{'-l'}) {
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#'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa 16717 panic.c'
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$line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
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$line =~ m/^([0-9]+) (.+) ($oid_regex) +(-|[0-9]+)\t(.+)$/s;
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$res{'mode'} = $1;
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$res{'type'} = $2;
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@ -3657,7 +3694,7 @@ sub parse_ls_tree_line {
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}
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} else {
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#'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa panic.c'
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$line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
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$line =~ m/^([0-9]+) (.+) ($oid_regex)\t(.+)$/s;
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$res{'mode'} = $1;
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$res{'type'} = $2;
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@ -4799,7 +4836,7 @@ sub fill_from_file_info {
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sub is_deleted {
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my $diffinfo = shift;
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return $diffinfo->{'to_id'} eq ('0' x 40);
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return $diffinfo->{'to_id'} eq ('0' x 40) || $diffinfo->{'to_id'} eq ('0' x 64);
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}
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# does patch correspond to [previous] difftree raw line
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@ -6285,7 +6322,7 @@ sub git_search_changes {
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-class => "list subject"},
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chop_and_escape_str($co{'title'}, 50) . "<br/>");
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} elsif (defined $set{'to_id'}) {
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next if ($set{'to_id'} =~ m/^0{40}$/);
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next if is_deleted(\%set);
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print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
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hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
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@ -6829,7 +6866,7 @@ sub git_blame_common {
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# the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
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# no <lines in group> for subsequent lines in group of lines
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my ($full_rev, $orig_lineno, $lineno, $group_size) =
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($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
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($line =~ /^($oid_regex) (\d+) (\d+)(?: (\d+))?$/);
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if (!exists $metainfo{$full_rev}) {
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$metainfo{$full_rev} = { 'nprevious' => 0 };
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}
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@ -6879,7 +6916,7 @@ sub git_blame_common {
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}
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# 'previous' <sha1 of parent commit> <filename at commit>
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if (exists $meta->{'previous'} &&
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$meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
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$meta->{'previous'} =~ /^($oid_regex) (.*)$/) {
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$meta->{'parent'} = $1;
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$meta->{'file_parent'} = unquote($2);
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}
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@ -6996,7 +7033,7 @@ sub git_blob_plain {
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} else {
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die_error(400, "No file name defined");
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}
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} elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
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} elsif ($hash =~ m/^$oid_regex$/) {
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# blobs defined by non-textual hash id's can be cached
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$expires = "+1d";
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}
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@ -7057,7 +7094,7 @@ sub git_blob {
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} else {
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die_error(400, "No file name defined");
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}
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} elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
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} elsif ($hash =~ m/^$oid_regex$/) {
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# blobs defined by non-textual hash id's can be cached
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$expires = "+1d";
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}
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@ -7515,7 +7552,7 @@ sub git_commit {
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# non-textual hash id's can be cached
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my $expires;
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if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
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if ($hash =~ m/^$oid_regex$/) {
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$expires = "+1d";
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}
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my $refs = git_get_references();
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@ -7609,7 +7646,7 @@ sub git_object {
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close $fd;
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#'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa panic.c'
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unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
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unless ($line && $line =~ m/^([0-9]+) (.+) ($oid_regex)\t/) {
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die_error(404, "File or directory for given base does not exist");
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}
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$type = $2;
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@ -7649,7 +7686,7 @@ sub git_blobdiff {
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or die_error(404, "Blob diff not found");
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} elsif (defined $hash &&
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$hash =~ /[0-9a-fA-F]{40}/) {
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$hash =~ $oid_regex) {
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# try to find filename from $hash
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# read filtered raw output
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@ -7659,7 +7696,7 @@ sub git_blobdiff {
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@difftree =
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# ':100644 100644 03b21826... 3b93d5e7... M ls-files.c'
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# $hash == to_id
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grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
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grep { /^:[0-7]{6} [0-7]{6} $oid_regex $hash/ }
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map { chomp; $_ } <$fd>;
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close $fd
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or die_error(404, "Reading git-diff-tree failed");
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@ -7682,8 +7719,8 @@ sub git_blobdiff {
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$hash ||= $diffinfo{'to_id'};
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# non-textual hash id's can be cached
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if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
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$hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
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if ($hash_base =~ m/^$oid_regex$/ &&
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$hash_parent_base =~ m/^$oid_regex$/) {
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$expires = '+1d';
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}
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@ -7819,7 +7856,7 @@ sub git_commitdiff {
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$hash_parent ne '-c' && $hash_parent ne '--cc') {
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# commitdiff with two commits given
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my $hash_parent_short = $hash_parent;
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if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
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if ($hash_parent =~ m/^$oid_regex$/) {
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$hash_parent_short = substr($hash_parent, 0, 7);
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}
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$formats_nav .=
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@ -7928,7 +7965,7 @@ sub git_commitdiff {
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# non-textual hash id's can be cached
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my $expires;
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if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
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if ($hash =~ m/^$oid_regex$/) {
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$expires = "+1d";
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}
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