Dgit.pm: Provide executable_on_path (avoids loading File::Which which is rather more...

diff --git a/Debian/Dgit.pm b/Debian/Dgit.pm
index a453f352718b33a5567e040cdd9302973c40b279..fce2ceb68ed7ef2eefdec0dec170a53c22632f99 100644 (file)
--- a/Debian/Dgit.pm
+++ b/Debian/Dgit.pm
@@ -17,7 +17,8 @@ BEGIN {
     @ISA         = qw(Exporter);
     @EXPORT      = qw(setup_sigwarn
                       debiantag server_branch server_ref
     @ISA         = qw(Exporter);
     @EXPORT      = qw(setup_sigwarn
                       debiantag server_branch server_ref

-                      stat_exists fail ensuredir waitstatusmsg failedcmd
+                      stat_exists fail ensuredir executable_on_path
+                      waitstatusmsg failedcmd

                       cmdoutput cmdoutput_errok
                       git_rev_parse git_get_ref git_for_each_ref
                       git_for_each_tag_referring is_fast_fwd
                       cmdoutput cmdoutput_errok
                       git_rev_parse git_get_ref git_for_each_ref
                       git_for_each_tag_referring is_fast_fwd


@@ -153,6 +154,17 @@ sub ensuredir ($) {
     die "mkdir $dir: $!";
 }
 
     die "mkdir $dir: $!";
 }
 

+sub executable_on_path ($) {
+    my ($program) = @_;
+    return 1 if $program =~ m{/};
+    my @path = split /:/, ($ENV{PATH} // "/usr/local/bin:/bin:/usr/bin");
+    foreach my $pe (@path) {
+       my $here = "$pe/$program";
+       return $here if stat_exists $here && -x _;
+    }
+    return undef;
+}
+

 our @signames = split / /, $Config{sig_name};
 
 sub waitstatusmsg () {
 our @signames = split / /, $Config{sig_name};
 
 sub waitstatusmsg () {