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#!/usr/bin/env perl
# SPDX-License-Identifier: GPL-2.0
#
# Treewide grep for references to files under Documentation, and report
# non-existing files in stderr.
use warnings;
use strict;
use Getopt::Long qw(:config no_auto_abbrev);
my $scriptname = $0;
$scriptname =~ s,.*/([^/]+/),$1,;
# Parse arguments
my $help = 0;
my $fix = 0;
GetOptions(
'fix' => \$fix,
'h|help|usage' => \$help,
);
if ($help != 0) {
print "$scriptname [--help] [--fix]\n";
exit -1;
}
# Step 1: find broken references
print "Finding broken references. This may take a while... " if ($fix);
my %broken_ref;
open IN, "git grep 'Documentation/'|"
or die "Failed to run git grep";
while (<IN>) {
next if (!m/^([^:]+):(.*)/);
my $f = $1;
my $ln = $2;
# Makefiles contain nasty expressions to parse docs
next if ($f =~ m/Makefile/);
# Skip this script
next if ($f eq $scriptname);
if ($ln =~ m,\b(\S*)(Documentation/[A-Za-z0-9\_\.\,\~/\*\[\]\?+-]*),) {
my $prefix = $1;
my $ref = $2;
my $base = $2;
$ref =~ s/[\,\.]+$//;
my $fulref = "$prefix$ref";
$fulref =~ s/^(\<file|ref)://;
$fulref =~ s/^[\'\`]+//;
$fulref =~ s,^\$\(.*\)/,,;
$base =~ s,.*/,,;
# Remove URL false-positives
next if ($fulref =~ m/^http/);
# Check if exists, evaluating wildcards
next if (grep -e, glob("$ref $fulref"));
if ($fix) {
if (!($ref =~ m/(devicetree|scripts|Kconfig|Kbuild)/)) {
$broken_ref{$ref}++;
}
} else {
print STDERR "$f: $fulref\n";
}
}
}
exit 0 if (!$fix);
# Step 2: Seek for file name alternatives
print "Auto-fixing broken references. Please double-check the results\n";
foreach my $ref (keys %broken_ref) {
my $new =$ref;
# get just the basename
$new =~ s,.*/,,;
# Seek for the same name on another place, as it may have been moved
my $f="";
$f = qx(find . -iname $new) if ($new);
# usual reason for breakage: file renamed to .rst
if (!$f) {
$new =~ s/\.txt$/.rst/;
$f=qx(find . -iname $new) if ($new);
}
my @find = split /\s+/, $f;
if (!$f) {
print STDERR "ERROR: Didn't find a replacement for $ref\n";
} elsif (scalar(@find) > 1) {
print STDERR "WARNING: Won't auto-replace, as found multiple files close to $ref:\n";
foreach my $j (@find) {
$j =~ s,^./,,;
print STDERR " $j\n";
}
} else {
$f = $find[0];
$f =~ s,^./,,;
print "INFO: Replacing $ref to $f\n";
foreach my $j (qx(git grep -l $ref)) {
qx(sed "s\@$ref\@$f\@g" -i $j);
}
}
}
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