scripts/cleanup-trace-events: Update for current practice

Emit comments with shortened file names (previous commit).

Limit search to the input file's directory.

Cope with properties tcg (commit b2b36c2) and vcpu (commit
3d211d9).

Cope with capital letters in function names.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-id: 20190314180929.27722-4-armbru@redhat.com
Message-Id: <20190314180929.27722-4-armbru@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

scripts/cleanup-trace-events.pl

@@ -13,6 +13,7 @@
 
 use warnings;
 use strict;
+use File::Basename;
 
 my $buf = '';
 my %seen = ();
@@ -23,12 +24,19 @@ sub out {
     %seen = ();
 }
 
-while (<>) {
-    if (/^(disable )?([a-z_0-9]+)\(/) {
-        open GREP, '-|', 'git', 'grep', '-lw', "trace_$2"
+$#ARGV == 0 or die "usage: $0 FILE";
+my $in = $ARGV[0];
+my $dir = dirname($in);
+open(IN, $in) or die "open $in: $!";
+chdir($dir) or die "chdir $dir: $!";
+
+while (<IN>) {
+    if (/^(disable |(tcg) |vcpu )*([a-z_0-9]+)\(/i) {
+        my $pat = "trace_$3";
+        $pat .= '_tcg' if (defined $2);
+        open GREP, '-|', 'git', 'grep', '-lw', '--max-depth', '1', $pat
             or die "run git grep: $!";
-        my $fname;
-        while ($fname = <GREP>) {
+        while (my $fname = <GREP>) {
             chomp $fname;
             next if $seen{$fname} || $fname eq 'trace-events';
             $seen{$fname} = 1;
@@ -49,3 +57,4 @@ sub out {
 }
 
 out;
+close(IN) or die "close $in: $!";