1 files changed, 92 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/applications/editors/jetbrains/update.pl b/nixpkgs/pkgs/applications/editors/jetbrains/update.pl
new file mode 100755
index 000000000000..6f0a451849a0
--- /dev/null
+++ b/nixpkgs/pkgs/applications/editors/jetbrains/update.pl
@@ -0,0 +1,92 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i perl -p perl perlPackages.LWPProtocolHttps perlPackages.FileSlurp
+
+use strict;
+use List::Util qw(reduce);
+use File::Slurp;
+use LWP::Simple;
+
+sub semantic_less {
+  my ($a, $b) = @_;
+  $a =~ s/\b(\d+)\b/sprintf("%010s", $1)/eg;
+  $b =~ s/\b(\d+)\b/sprintf("%010s", $1)/eg;
+  return $a lt $b;
+}
+
+sub get_latest_versions {
+  my @channels = get("http://www.jetbrains.com/updates/updates.xml") =~ /(<channel .+?<\/channel>)/gs;
+  my %h = {};
+  for my $ch (@channels) {
+    my ($id) = $ch =~ /^<channel id="[^"]+" name="([^"]+)"/;
+    my @builds = $ch =~ /(<build .+?<\/build>)/gs;
+    my $latest_build = reduce {
+      my ($aversion) = $a =~ /^<build [^>]*version="([^"]+)"/; die "no version in $a" unless $aversion;
+      my ($bversion) = $b =~ /^<build [^>]*version="([^"]+)"/; die "no version in $b" unless $bversion;
+      semantic_less($aversion, $bversion) ? $b : $a;
+    } @builds;
+    next unless $latest_build;
+
+    # version as in download url
+    my ($version) = $latest_build =~ /^<build [^>]*version="([^"]+)"/;
+    my ($fullNumber) = $latest_build =~ /^<build [^>]*fullNumber="([^"]+)"/;
+    my $latest_version_full1 = "$version-$fullNumber";
+    $latest_version_full1 =~ s/\s*EAP//;
+
+    my ($latest_version) = $latest_build =~ /^<build [^>]*version="([^"]+)"/;
+    ($latest_version) = $latest_build =~ /^<build [^>]*fullNumber="([^"]+)"/ if $latest_version =~ / /;
+
+    $h{$id} = $latest_version;
+    $h{"full1_" . $id} = $latest_version_full1;
+  }
+  return %h;
+}
+
+my %latest_versions = get_latest_versions();
+# for my $ch (sort keys %latest_versions) {
+#  print("$ch $latest_versions{$ch}\n");
+# }
+
+sub update_nix_block {
+  my ($block) = @_;
+  my ($channel) = $block =~ /update-channel\s*=\s*"([^"]+)"/;
+  if ($channel) {
+    if ($latest_versions{$channel}) {
+      my ($version) = $block =~ /version\s*=\s*"([^"]+)"/;
+      die "no version in $block" unless $version;
+      if ($version eq $latest_versions{$channel}) {
+        print("$channel is up to date at $version\n");
+      } else {
+        print("updating $channel: $version -> $latest_versions{$channel}\n");
+        my ($url) = $block =~ /url\s*=\s*"([^"]+)"/;
+        # try to interpret some nix
+        my ($name) = $block =~ /name\s*=\s*"([^"]+)"/;
+        $name =~ s/\$\{version\}/$latest_versions{$channel}/;
+        $url =~ s/\$\{name\}/$name/;
+        $url =~ s/\$\{version\}/$latest_versions{$channel}/;
+        die "$url still has some interpolation" if $url =~ /\$/;
+        my ($sha256) = get("$url.sha256") =~ /^([0-9a-f]{64})/;
+        my $version_string = $latest_versions{$channel};
+        unless ( $sha256 ) {
+          my $full_version = $latest_versions{"full1_" . $channel};
+          $url =~ s/$version_string/$full_version/;
+          ($sha256) = get("$url.sha256") =~ /^([0-9a-f]{64})/;
+          $version_string = $full_version;
+        }
+        die "invalid sha256 in $url.sha256" unless $sha256;
+        my ($sha256Base32) = readpipe("nix-hash --type sha256 --to-base32 $sha256");
+        chomp $sha256Base32;
+        print "Jetbrains published SHA256: $sha256\n";
+        print "Conversion into base32 yields: $sha256Base32\n";
+        $block =~ s#version\s*=\s*"([^"]+)".+$#version = "$version_string"; /* updated by script */#m;
+        $block =~ s#sha256\s*=\s*"([^"]+)".+$#sha256 = "$sha256Base32"; /* updated by script */#m;
+      }
+    } else {
+      warn "unknown update-channel $channel";
+    }
+  }
+  return $block;
+}
+
+my $nix = read_file 'default.nix';
+$nix =~ s/(= build\w+ rec \{.+?\n  \};\n)/update_nix_block($1)/gse;
+write_file 'default.nix', $nix;