musl

Dockerfile

@@ -5,11 +5,16 @@ ENV VERSION 2.5.5
 RUN apk add --no-cache git nodejs nodejs-npm yarn tzdata libxslt-dev libxml2-dev
 RUN apk add --no-cache ruby-dev ruby-bundler ruby-json ruby-bigdecimal ruby-rake ruby-etc
 RUN apk add --no-cache postgresql-dev sqlite-dev mariadb-dev
-RUN apk add --no-cache linux-headers cmake
+RUN apk add --no-cache linux-headers
 RUN test "$VERSION" = `ruby -e 'puts RUBY_VERSION'`
 
 RUN addgroup -g 82 -S www-data
 RUN adduser -s /bin/sh -G www-data -h /home/app -D app
 RUN install -dm 2750 -o app -g www-data /home/app/sutty
 
+# https://github.com/rubygems/rubygems/issues/2918
+# https://gitlab.alpinelinux.org/alpine/aports/issues/10808
+COPY ./rubygems-platform-musl.patch /tmp/
+RUN patch -d /usr/lib/ruby/2.5.0 -Np 0 -i /tmp/rubygems-platform-musl.patch
+
 ENTRYPOINT /bin/sh

rubygems-platform-musl.patch

@@ -0,0 +1,25 @@
+--- rubygems/platform.rb.orig
++++ rubygems/platform.rb
+@@ -89,7 +89,7 @@
+                       when /^dalvik(\d+)?$/ then        [ 'dalvik',    $1  ]
+                       when /^dotnet$/ then              [ 'dotnet',    nil ]
+                       when /^dotnet([\d.]*)/ then       [ 'dotnet',    $1  ]
+-                      when /linux/ then                 [ 'linux',     $1  ]
++                      when /linux-?(\w+)?/ then         [ 'linux',     $1  ]
+                       when /mingw32/ then               [ 'mingw32',   nil ]
+                       when /(mswin\d+)(\_(\d+))?/ then
+                         os, version = $1, $3
+--- rubygems.rb.orig
++++ rubygems.rb
+@@ -764,10 +764,7 @@
+   def self.platforms
+     @platforms ||= []
+     if @platforms.empty?
+-      # XXX: Patched to avoid installing platform-specific gems with binaries
+-      # linked against glibc.
+-      @platforms = [Gem::Platform::RUBY]
+-      #@platforms = [Gem::Platform::RUBY, Gem::Platform.local]
++      @platforms = [Gem::Platform::RUBY, Gem::Platform.local]
+     end
+     @platforms
+   end