Add dependency generator

This generates `rdoc-generator-fedora-darkfish-assets` dependency for
standard RubyGems doc locations, which contains symlinks to the assets.

3 files changed, 44 insertions, 4 deletions

diff --git a/rdoc-generator-fedora-darkfish.spec b/rdoc-generator-fedora-darkfish.spec
index 8212b33..0891e2d 100644
--- a/rdoc-generator-fedora-darkfish.spec
+++ b/rdoc-generator-fedora-darkfish.spec
@@ -11,8 +11,10 @@ Summary: Darkfish RDoc Generator
 License: GPL-2.0-only AND Ruby AND BSD-3-Clause AND CC-BY-2.5
 URL: https://ruby.github.io/rdoc
 Source0: https://rubygems.org/gems/rdoc-%{version}.gem
-Source1: fedora_darkfish.rb
-Source2: rubygems_plugin.rb
+Source1: rdoc_generator_fedora_darkfish.attr
+Source2: rdoc_generator_fedora_darkfish.req
+Source3: fedora_darkfish.rb
+Source4: rubygems_plugin.rb
 # Because the fonts are not embedded, do not refer to them in the font.css
 # file.
 Patch0: rdoc-6.4.0-Drop-the-font-URLs-from-css.patch
@@ -47,6 +49,15 @@ generated for rubygem- packages on Fedora.
 %build
 
 %install
+# Install dependency generators.
+mkdir -p %{buildroot}%{_fileattrsdir}
+install -m 644 %{SOURCE1} %{buildroot}%{_fileattrsdir}
+install -m 755 %{SOURCE2} %{buildroot}%{_rpmconfigdir}
+sed -i \
+  -e 's|%%{name}|%{name}|' \
+  -e 's|%%{_datadir}|%{_datadir}|' \
+  %{buildroot}%{_rpmconfigdir}/*.req
+
 pushd lib/rdoc/generator/template/
 find . -mindepth 2 -type d \
   -exec install -d %{buildroot}%{_datadir}/%{name}/{} \;
@@ -59,8 +70,8 @@ rm %{buildroot}%{_datadir}/%{name}/{darkfish,json_index}/.document
 # Drop fonts. System fonts are going to be pulled in instead.
 rm -rf %{buildroot}%{_datadir}/%{name}/darkfish/fonts
 
-install -p -m 644 %{SOURCE1} %{buildroot}%{_datadir}/%{name}/
-install -p -m 644 %{SOURCE2} %{buildroot}%{_datadir}/%{name}/
+install -p -m 644 %{SOURCE3} %{buildroot}%{_datadir}/%{name}/
+install -p -m 644 %{SOURCE4} %{buildroot}%{_datadir}/%{name}/
 
 mkdir -p $(dirname %{buildroot}%{gem_plugin})
 echo "require '%{_datadir}/%{name}/rubygems_plugin.rb'" > %{buildroot}%{gem_plugin}
@@ -69,6 +80,8 @@ echo "require '%{_datadir}/%{name}/rubygems_plugin.rb'" > %{buildroot}%{gem_plug
 # Not test ATM. Not clear if there is actually something to test.
 
 %files
+%{_fileattrsdir}/*.attr
+%{_rpmconfigdir}/*.req
 %{gem_plugin}
 %{_datadir}/%{name}/darkfish/*.rhtml
 %{_datadir}/%{name}/fedora_darkfish.rb
diff --git a/rdoc_generator_fedora_darkfish.attr b/rdoc_generator_fedora_darkfish.attr
new file mode 100644
index 0000000..ed3dad5
--- /dev/null
+++ b/rdoc_generator_fedora_darkfish.attr
@@ -0,0 +1,4 @@
+%__rdoc_generator_fedora_darkfish_requires	%{_rpmconfigdir}/rdoc_generator_fedora_darkfish.req
+# In non-gem packages, the %%{gem_name} macro is not available and the macro
+# stays unexpanded which leads to "invalid regex" error (rhbz#1154067).
+%__rdoc_generator_fedora_darkfish_path		^%{?gem_name:%{gem_docdir}/rdoc}%{!?gem_name:this_should_never_match_anything}$
diff --git a/rdoc_generator_fedora_darkfish.req b/rdoc_generator_fedora_darkfish.req
new file mode 100644
index 0000000..f3bd61b
--- /dev/null
+++ b/rdoc_generator_fedora_darkfish.req
@@ -0,0 +1,23 @@
+#!/usr/bin/ruby
+
+module FedoraDarkfishAssetsReq
+  FEDORA_DARKFISH_ASSETS_DIR = '%{_datadir}/%{name}'
+  FEDORA_DARKFISH_ASSETS_DIR_REGEXP = Regexp.new "#{FEDORA_DARKFISH_ASSETS_DIR}/.*"
+
+  # Go through all subdirectories and look for symlinks, which corresponds
+  # to fedora-darkfish template. In that case generate the require for such
+  # filename.
+  def self.requires
+    while filename = gets
+      filename.strip!
+      fedora_darkfish_asset = !!Dir.glob("#{filename}/**/*").find do |f|
+        File.symlink?(f) && File.readlink(f) =~ FEDORA_DARKFISH_ASSETS_DIR_REGEXP
+      end
+      puts '%{name}-assets' if fedora_darkfish_asset
+    end
+  end
+end
+
+if __FILE__ == $0
+  FedoraDarkfishAssetsReq::requires
+end