buildsys: abi-generate: add usage output

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

diff --git a/debian/scripts/abi-generate b/debian/scripts/abi-generate
index 44704fb598ebd1fc6c3341bb15d143578c7d400e..c4a26bfb8f720cfed6f9c89eaeca955215deb038 100755 (executable)
--- a/debian/scripts/abi-generate
+++ b/debian/scripts/abi-generate
@@ -4,8 +4,12 @@ use PVE::Tools;
 
 use IO::File;
 
-my $input_file = shift;
-my $output_file = shift;
+sub usage {
+    die "USAGE: $0 INFILE OUTFILE [ABI INFILE-IS-DEB]\n";
+}
+
+my $input_file = shift // usage();
+my $output_file = shift // usage();
 my $abi = shift;
 my $extract_deb = shift;
 
@@ -14,6 +18,7 @@ die "input file '$input_file' does not exist\n" if ! -e $input_file;
 my $modules_symver_fh;
 
 if ($extract_deb) {
+       usage() if !defined($abi);
        my $cmd = [];
        push @$cmd, ['dpkg', '--fsys-tarfile', $input_file];
        push @$cmd, ['tar', '-xOf', '-', "./usr/src/linux-headers-${abi}/Module.symvers"];