Delete manifests in "nix-channel --remove" or when a binary cache is available

perl/lib/Nix/Manifest.pm

@@ -9,7 +9,7 @@ use Fcntl ':flock';
 use Nix::Config;
 
 our @ISA = qw(Exporter);
-our @EXPORT = qw(readManifest writeManifest updateManifestDB addPatch);
+our @EXPORT = qw(readManifest writeManifest updateManifestDB addPatch deleteOldManifests);
 
 
 sub addNAR {
@@ -93,7 +93,7 @@ sub readManifest_ {
                 undef $system;
                 $references = "";
                 $deriver = "";
-	    }
+            }
 
         } else {
 
@@ -211,11 +211,11 @@ sub writeManifest {
 
     # Create a bzipped manifest.
     unless (defined $noCompress) {
-	system("$Nix::Config::bzip2 < $manifest > $manifest.bz2.tmp") == 0
-	    or die "cannot compress manifest";
+        system("$Nix::Config::bzip2 < $manifest > $manifest.bz2.tmp") == 0
+            or die "cannot compress manifest";
 
-	rename("$manifest.bz2.tmp", "$manifest.bz2")
-	    or die "cannot rename $manifest.bz2.tmp: $!";
+        rename("$manifest.bz2.tmp", "$manifest.bz2")
+            or die "cannot rename $manifest.bz2.tmp: $!";
     }
 }
 
@@ -364,4 +364,22 @@ EOF
 }
 
 
+
+# Delete all old manifests downloaded from a given URL.
+sub deleteOldManifests {
+    my ($url, $curUrlFile) = @_;
+    for my $urlFile (glob "$Nix::Config::manifestDir/*.url") {
+        next if defined $curUrlFile && $urlFile eq $curUrlFile;
+        open URL, "<$urlFile" or die;
+        my $url2 = <URL>;
+        chomp $url2;
+        close URL;
+        next unless $url eq $url2;
+        my $base = $urlFile; $base =~ s/.url$//;
+        unlink "${base}.url";
+        unlink "${base}.nixmanifest";
+    }
+}
+
+
 return 1;

scripts/download-from-binary-cache.pl.in

@@ -20,6 +20,7 @@ my $maxParallelRequests = int($Nix::Config::config{"binary-caches-parallel-conne
 $maxParallelRequests = 1 if $maxParallelRequests < 1;
 
 my $debug = ($ENV{"NIX_DEBUG_SUBST"} // "") eq 1;
+open(STDERR, ">>/dev/tty") if $debug;
 
 my ($dbh, $queryCache, $insertNAR, $queryNAR, $insertNARExistence, $queryNARExistence);
 

scripts/nix-channel.in

@@ -4,6 +4,7 @@ use strict;
 use File::Basename;
 use File::Path qw(mkpath);
 use Nix::Config;
+use Nix::Manifest;
 
 my $manifestDir = $Nix::Config::manifestDir;
 
@@ -65,6 +66,8 @@ sub addChannel {
 sub removeChannel {
     my ($name) = @_;
     readChannels;
+    my $url = $channels{$name};
+    deleteOldManifests($url . "/MANIFEST", undef) if defined $url;
     delete $channels{$name};
     writeChannels;
 
@@ -101,6 +104,7 @@ sub update {
         my $extraAttrs = "";
         if ($? == 0 && $binaryCacheURL ne "") {
             $extraAttrs .= "binaryCacheURL = \"$binaryCacheURL\"; ";
+            deleteOldManifests($origUrl, undef);
         } else {
             # No binary cache, so pull the channel manifest.
             mkdir $manifestDir, 0755 unless -e $manifestDir;

scripts/nix-pull.in

@@ -84,18 +84,7 @@ sub processURL {
     symlink("$manifest", "$finalPath")
         or die "cannot link `$finalPath to `$manifest'";
 
-    # Delete all old manifests downloaded from this URL.
-    for my $urlFile2 (glob "$manifestDir/*.url") {
-        next if $urlFile eq $urlFile2;
-        open URL, "<$urlFile2" or die;
-        my $url2 = <URL>;
-        chomp $url2;
-        close URL;
-        next unless $origUrl eq $url2;
-        my $base = $urlFile2; $base =~ s/.url$//;
-        unlink "${base}.url";
-        unlink "${base}.nixmanifest";
-    }
+    deleteOldManifests($origUrl, $urlFile);
 }
 
 while (@ARGV) {