From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 28 Nov 2015 15:56:10 +0000 (+0000)
Subject: Dgit.pm: Provide hashfile()
X-Git-Tag: archive/debian/2.0~340
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=dgit.git;a=commitdiff_plain;h=f1d9b2980bf85457cb37fba193fbd930ffe4ebac;ds=inline

Dgit.pm: Provide hashfile()

Call site(s) will come later.
---

diff --git a/Debian/Dgit.pm b/Debian/Dgit.pm
index fa853741..2555812c 100644
--- a/Debian/Dgit.pm
+++ b/Debian/Dgit.pm
@@ -8,6 +8,7 @@ use warnings;
 use POSIX;
 use IO::Handle;
 use Config;
+use Digest::SHA;
 
 BEGIN {
     use Exporter   ();
@@ -18,6 +19,7 @@ BEGIN {
     @EXPORT      = qw(setup_sigwarn
                       debiantag server_branch server_ref
                       stat_exists link_ltarget
+		      hashfile
                       fail ensuredir executable_on_path
                       waitstatusmsg failedcmd
                       cmdoutput cmdoutput_errok
@@ -229,6 +231,13 @@ sub link_ltarget ($$) {
     link $old, $new or die "link $old $new: $!";
 }
 
+sub hashfile ($) {
+    my ($fn) = @_;
+    my $h = Digest::SHA->new(256);
+    $h->addfile($fn);
+    return $h->hexdigest();
+}
+
 sub git_rev_parse ($) {
     return cmdoutput qw(git rev-parse), "$_[0]~0";
 }