add puppet stdlib

[dsa-puppet.git] / modules / stdlib / lib / puppet / parser / functions / chomp.rb

diff --git a/modules/stdlib/lib/puppet/parser/functions/chomp.rb b/modules/stdlib/lib/puppet/parser/functions/chomp.rb
new file mode 100644 (file)
index 0000000..c99d139
--- /dev/null
+++ b/modules/stdlib/lib/puppet/parser/functions/chomp.rb
@@ -0,0 +1,35 @@
+#
+#  chomp.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:chomp, :type => :rvalue, :doc => <<-'EOS'
+    Removes the record separator from the end of a string or an array of 
+    strings, for example `hello\n` becomes `hello`.
+    Requires a single string or array as an input.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "chomp(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    value = arguments[0]
+    klass = value.class
+
+    unless [Array, String].include?(klass)
+      raise(Puppet::ParseError, 'chomp(): Requires either ' +
+        'array or string to work with')
+    end
+
+    if value.is_a?(Array)
+      # Numbers in Puppet are often string-encoded which is troublesome ...
+      result = value.collect { |i| i.is_a?(String) ? i.chomp : i }
+    else
+      result = value.chomp
+    end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :