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