Throw error if executable is not found

m-basov · Aug 31, 2016 · 48f8140 · 48f8140
1 parent 6a0a3eb
commit 48f8140
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Showing 2 changed files with 10 additions and 2 deletions.
diff --git a/.travis.yml b/.travis.yml
@@ -13,6 +13,6 @@ notifications:
   email: false
 
 before_script:
-  - nvm install 5.6
-  - nvm use 5.6
+  - nvm install 6.5
+  - nvm use 6.5
   - npm install
diff --git a/lib/mjml/parser.rb b/lib/mjml/parser.rb
@@ -4,10 +4,13 @@ module MJML
   # Parser for MJML templates
   class Parser
     class InvalidTemplate < StandardError; end
+    class ExecutableNotFound < StandardError; end
 
     ROOT_TAGS_REGEX = %r{<mjml>.*<\/mjml>}im
+    VERSION_REGEX = /^\d\.\d\.\d/i
 
     def initialize
+      raise ExecutableNotFound if mjml_version.nil?
     end
 
     def call(template)
@@ -39,5 +42,10 @@ def partial?(template)
     def mjml_bin
       MJML.config.bin_path
     end
+
+    def mjml_version
+      ver = `#{mjml_bin} -V`.strip
+      (ver =~ VERSION_REGEX).nil? ? nil : ver
+    end
   end
 end