checksrc-all: rewrite in Perl

scripts/checksrc-all.pl

@@ -0,0 +1,38 @@
+#!/usr/bin/env perl
+# Copyright (C) Viktor Szakats
+#
+# SPDX-License-Identifier: curl
+
+use strict;
+use warnings;
+
+use File::Basename;
+use File::Find;
+use Cwd 'abs_path';
+
+my @files;
+if(system('git rev-parse --is-inside-work-tree >/dev/null 2>&1') == 0) {
+  @files = `git ls-files '*.[ch]'`;
+}
+else {
+  find(sub { if(/\.[ch]/) { push(@files, $File::Find::name) } }, ('.'));
+}
+if(@ARGV) {
+  find(sub { if(/\.[ch]/) { push(@files, $File::Find::name) } }, @ARGV);
+}
+
+@files = grep !/\/CMakeFiles\//, @files;
+@files = map { dirname($_) } @files;
+my @dirs = sort { $a cmp $b } keys %{{ map { $_ => 1 } @files }};
+
+my $scripts_dir = dirname(abs_path($0));
+my $anyfailed = 0;
+
+for my $dir (@dirs) {
+    @files = glob("$dir/*.[ch]");
+    if(@files && system("$scripts_dir/checksrc.pl", @files) != 0) {
+        $anyfailed = 1;
+    }
+}
+
+exit $anyfailed;