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![Johannes Schindelin](/assets/img/avatar_default.png)
* maint-2.26: Git 2.26.3 Git 2.25.5 Git 2.24.4 Git 2.23.4 Git 2.22.5 Git 2.21.4 Git 2.20.5 Git 2.19.6 Git 2.18.5 Git 2.17.6 unpack_trees(): start with a fresh lstat cache run-command: invalidate lstat cache after a command finished checkout: fix bug that makes checkout follow symlinks in leading path
248 lines
7.6 KiB
Perl
248 lines
7.6 KiB
Perl
#
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# Example implementation for the Git filter protocol version 2
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# See Documentation/gitattributes.txt, section "Filter Protocol"
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#
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# Usage: rot13-filter.pl [--always-delay] <log path> <capabilities>
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#
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# Log path defines a debug log file that the script writes to. The
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# subsequent arguments define a list of supported protocol capabilities
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# ("clean", "smudge", etc).
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#
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# When --always-delay is given all pathnames with the "can-delay" flag
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# that don't appear on the list bellow are delayed with a count of 1
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# (see more below).
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#
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# This implementation supports special test cases:
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# (1) If data with the pathname "clean-write-fail.r" is processed with
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# a "clean" operation then the write operation will die.
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# (2) If data with the pathname "smudge-write-fail.r" is processed with
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# a "smudge" operation then the write operation will die.
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# (3) If data with the pathname "error.r" is processed with any
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# operation then the filter signals that it cannot or does not want
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# to process the file.
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# (4) If data with the pathname "abort.r" is processed with any
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# operation then the filter signals that it cannot or does not want
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# to process the file and any file after that is processed with the
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# same command.
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# (5) If data with a pathname that is a key in the DELAY hash is
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# requested (e.g. "test-delay10.a") then the filter responds with
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# a "delay" status and sets the "requested" field in the DELAY hash.
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# The filter will signal the availability of this object after
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# "count" (field in DELAY hash) "list_available_blobs" commands.
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# (6) If data with the pathname "missing-delay.a" is processed that the
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# filter will drop the path from the "list_available_blobs" response.
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# (7) If data with the pathname "invalid-delay.a" is processed that the
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# filter will add the path "unfiltered" which was not delayed before
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# to the "list_available_blobs" response.
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#
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use 5.008;
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sub gitperllib {
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# Git assumes that all path lists are Unix-y colon-separated ones. But
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# when the Git for Windows executes the test suite, its MSYS2 Bash
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# calls git.exe, and colon-separated path lists are converted into
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# Windows-y semicolon-separated lists of *Windows* paths (which
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# naturally contain a colon after the drive letter, so splitting by
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# colons simply does not cut it).
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#
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# Detect semicolon-separated path list and handle them appropriately.
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if ($ENV{GITPERLLIB} =~ /;/) {
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return split(/;/, $ENV{GITPERLLIB});
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}
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return split(/:/, $ENV{GITPERLLIB});
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}
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use lib (gitperllib());
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use strict;
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use warnings;
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use IO::File;
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use Git::Packet;
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my $MAX_PACKET_CONTENT_SIZE = 65516;
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my $always_delay = 0;
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if ( $ARGV[0] eq '--always-delay' ) {
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$always_delay = 1;
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shift @ARGV;
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}
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my $log_file = shift @ARGV;
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my @capabilities = @ARGV;
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open my $debug, ">>", $log_file or die "cannot open log file: $!";
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my %DELAY = (
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'test-delay10.a' => { "requested" => 0, "count" => 1 },
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'test-delay11.a' => { "requested" => 0, "count" => 1 },
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'test-delay20.a' => { "requested" => 0, "count" => 2 },
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'test-delay10.b' => { "requested" => 0, "count" => 1 },
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'missing-delay.a' => { "requested" => 0, "count" => 1 },
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'invalid-delay.a' => { "requested" => 0, "count" => 1 },
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);
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sub rot13 {
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my $str = shift;
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$str =~ y/A-Za-z/N-ZA-Mn-za-m/;
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return $str;
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}
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print $debug "START\n";
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$debug->flush();
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packet_initialize("git-filter", 2);
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my %remote_caps = packet_read_and_check_capabilities("clean", "smudge", "delay");
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packet_check_and_write_capabilities(\%remote_caps, @capabilities);
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print $debug "init handshake complete\n";
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$debug->flush();
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while (1) {
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my ( $res, $command ) = packet_key_val_read("command");
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if ( $res == -1 ) {
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print $debug "STOP\n";
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exit();
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}
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print $debug "IN: $command";
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$debug->flush();
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if ( $command eq "list_available_blobs" ) {
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# Flush
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packet_compare_lists([1, ""], packet_bin_read()) ||
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die "bad list_available_blobs end";
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foreach my $pathname ( sort keys %DELAY ) {
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if ( $DELAY{$pathname}{"requested"} >= 1 ) {
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$DELAY{$pathname}{"count"} = $DELAY{$pathname}{"count"} - 1;
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if ( $pathname eq "invalid-delay.a" ) {
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# Send Git a pathname that was not delayed earlier
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packet_txt_write("pathname=unfiltered");
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}
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if ( $pathname eq "missing-delay.a" ) {
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# Do not signal Git that this file is available
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} elsif ( $DELAY{$pathname}{"count"} == 0 ) {
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print $debug " $pathname";
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packet_txt_write("pathname=$pathname");
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}
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}
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}
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packet_flush();
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print $debug " [OK]\n";
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$debug->flush();
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packet_txt_write("status=success");
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packet_flush();
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} else {
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my ( $res, $pathname ) = packet_key_val_read("pathname");
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if ( $res == -1 ) {
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die "unexpected EOF while expecting pathname";
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}
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print $debug " $pathname";
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$debug->flush();
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# Read until flush
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my ( $done, $buffer ) = packet_txt_read();
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while ( $buffer ne '' ) {
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if ( $buffer eq "can-delay=1" ) {
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if ( exists $DELAY{$pathname} and $DELAY{$pathname}{"requested"} == 0 ) {
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$DELAY{$pathname}{"requested"} = 1;
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} elsif ( !exists $DELAY{$pathname} and $always_delay ) {
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$DELAY{$pathname} = { "requested" => 1, "count" => 1 };
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}
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} elsif ($buffer =~ /^(ref|treeish|blob)=/) {
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print $debug " $buffer";
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} else {
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# In general, filters need to be graceful about
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# new metadata, since it's documented that we
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# can pass any key-value pairs, but for tests,
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# let's be a little stricter.
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die "Unknown message '$buffer'";
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}
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( $done, $buffer ) = packet_txt_read();
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}
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if ( $done == -1 ) {
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die "unexpected EOF after pathname '$pathname'";
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}
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my $input = "";
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{
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binmode(STDIN);
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my $buffer;
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my $done = 0;
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while ( !$done ) {
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( $done, $buffer ) = packet_bin_read();
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$input .= $buffer;
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}
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if ( $done == -1 ) {
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die "unexpected EOF while reading input for '$pathname'";
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}
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print $debug " " . length($input) . " [OK] -- ";
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$debug->flush();
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}
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my $output;
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if ( exists $DELAY{$pathname} and exists $DELAY{$pathname}{"output"} ) {
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$output = $DELAY{$pathname}{"output"}
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} elsif ( $pathname eq "error.r" or $pathname eq "abort.r" ) {
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$output = "";
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} elsif ( $command eq "clean" and grep( /^clean$/, @capabilities ) ) {
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$output = rot13($input);
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} elsif ( $command eq "smudge" and grep( /^smudge$/, @capabilities ) ) {
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$output = rot13($input);
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} else {
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die "bad command '$command'";
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}
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if ( $pathname eq "error.r" ) {
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print $debug "[ERROR]\n";
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$debug->flush();
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packet_txt_write("status=error");
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packet_flush();
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} elsif ( $pathname eq "abort.r" ) {
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print $debug "[ABORT]\n";
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$debug->flush();
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packet_txt_write("status=abort");
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packet_flush();
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} elsif ( $command eq "smudge" and
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exists $DELAY{$pathname} and
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$DELAY{$pathname}{"requested"} == 1 ) {
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print $debug "[DELAYED]\n";
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$debug->flush();
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packet_txt_write("status=delayed");
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packet_flush();
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$DELAY{$pathname}{"requested"} = 2;
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$DELAY{$pathname}{"output"} = $output;
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} else {
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packet_txt_write("status=success");
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packet_flush();
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if ( $pathname eq "${command}-write-fail.r" ) {
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print $debug "[WRITE FAIL]\n";
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$debug->flush();
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die "${command} write error";
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}
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print $debug "OUT: " . length($output) . " ";
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$debug->flush();
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while ( length($output) > 0 ) {
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my $packet = substr( $output, 0, $MAX_PACKET_CONTENT_SIZE );
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packet_bin_write($packet);
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# dots represent the number of packets
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print $debug ".";
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if ( length($output) > $MAX_PACKET_CONTENT_SIZE ) {
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$output = substr( $output, $MAX_PACKET_CONTENT_SIZE );
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} else {
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$output = "";
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}
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}
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packet_flush();
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print $debug " [OK]\n";
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$debug->flush();
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packet_flush();
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}
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}
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}
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