(MODULES-2410) Add new functions dos2unix and unix2dos

CHANGELOG.md

@@ -1,3 +1,17 @@
+##2015-08-13 - Supported Release 4.8.1
+###Summary
+
+Adds some new functions.
+
+####Features
+- Add new functions: `dos2unix` and `unix2dos`
+
+####Bugfixes
+- n/a
+
+####Improvements
+- n/a
+
 ## 2015-08-10 - Supported Release 4.8.0
 ### Summary
 This release adds a function for reading metadata.json from any module, and expands file\_line's abilities.

README.markdown

@@ -199,6 +199,19 @@ Returns the difference between two arrays. The returned array is a copy of the o
 
 Returns the `dirname` of a path. For example, `dirname('/path/to/a/file.ext')` returns '/path/to/a'. *Type*: rvalue.
 
+#### `dos2unix`
+
+Returns the Unix version of the given string. Very useful when using a File resource with a cross-platform template. *Type*: rvalue.
+
+~~~
+file{$config_file:
+  ensure  => file,
+  content => dos2unix(template('my_module/settings.conf.erb')),
+}
+~~~
+
+See also [unix2dos](#unix2dos).
+
 #### `downcase`
 
 Converts the case of a string or of all strings in an array to lowercase. *Type*: rvalue.
@@ -471,7 +484,7 @@ Returns the highest value of all arguments. Requires at least one argument. *Typ
 
 #### `member`
 
-This function determines if a variable is a member of an array. The variable can be either a string, array, or fixnum. For example, `member(['a','b'], 'b')` and `member(['a','b','c'], ['b','c'])` return 'true', while `member(['a','b'], 'c')` and `member(['a','b','c'], ['c','d'])` return 'false'. *Note*: This function does not support nested arrays. If the first argument contains nested arrays, it will not recurse through them. 
+This function determines if a variable is a member of an array. The variable can be either a string, array, or fixnum. For example, `member(['a','b'], 'b')` and `member(['a','b','c'], ['b','c'])` return 'true', while `member(['a','b'], 'c')` and `member(['a','b','c'], ['c','d'])` return 'false'. *Note*: This function does not support nested arrays. If the first argument contains nested arrays, it will not recurse through them.
 
 *Type*: rvalue.
 
@@ -520,7 +533,7 @@ From a list of values, returns the first value that is not undefined or an empty
 #### `prefix`
 
 Applies a prefix to all elements in an array, or to the keys in a hash.  
-For example: 
+For example:
 * `prefix(['a','b','c'], 'p')` returns ['pa','pb','pc']
 * `prefix({'a'=>'b','b'=>'c','c'=>'d'}, 'p')` returns {'pa'=>'b','pb'=>'c','pc'=>'d'}.  
 
@@ -697,6 +710,19 @@ Returns a union of two arrays, without duplicates. For example, `union(["a","b",
 
 Removes duplicates from strings and arrays. For example, `unique("aabbcc")` returns 'abc', and `unique(["a","a","b","b","c","c"])` returns ["a","b","c"]. *Type*: rvalue.
 
+#### `unix2dos`
+
+Returns the DOS version of the given string. Very useful when using a File resource with a cross-platform template. *Type*: rvalue.
+
+~~~
+file{$config_file:
+  ensure  => file,
+  content => unix2dos(template('my_module/settings.conf.erb')),
+}
+~~~
+
+See also [dos2unix](#dos2unix).
+
 #### `upcase`
 
 Converts an object, array or hash of objects that respond to upcase to uppercase. For example, `upcase('abcd')` returns 'ABCD'. *Type*: rvalue.
@@ -1002,7 +1028,7 @@ Instead, use:
 
 #### `values`
 
-Returns the values of a given hash. For example, given `$hash = {'a'=1, 'b'=2, 'c'=3} values($hash)` returns [1,2,3]. 
+Returns the values of a given hash. For example, given `$hash = {'a'=1, 'b'=2, 'c'=3} values($hash)` returns [1,2,3].
 
 *Type*: rvalue.
 
@@ -1048,7 +1074,3 @@ To report or research a bug with any part of this module, please go to
 ##Contributors
 
 The list of contributors can be found at: https://github.com/puppetlabs/puppetlabs-stdlib/graphs/contributors
-
-
-
-

lib/puppet/parser/functions/dos2unix.rb

@@ -0,0 +1,15 @@
+# Custom Puppet function to convert dos to unix format
+module Puppet::Parser::Functions
+  newfunction(:dos2unix, :type => :rvalue, :arity => 1, :doc => <<-EOS
+    Returns the Unix version of the given string.
+    Takes a single string argument.
+    EOS
+  ) do |arguments|
+
+    unless arguments[0].is_a?(String)
+      raise(Puppet::ParseError, 'dos2unix(): Requires string as argument')
+    end
+
+    arguments[0].gsub(/\r\n/, "\n")
+  end
+end

lib/puppet/parser/functions/unix2dos.rb

@@ -0,0 +1,15 @@
+# Custom Puppet function to convert unix to dos format
+module Puppet::Parser::Functions
+  newfunction(:unix2dos, :type => :rvalue, :arity => 1, :doc => <<-EOS
+    Returns the DOS version of the given string.
+    Takes a single string argument.
+    EOS
+  ) do |arguments|
+
+    unless arguments[0].is_a?(String)
+      raise(Puppet::ParseError, 'unix2dos(): Requires string as argument')
+    end
+
+    arguments[0].gsub(/\r*\n/, "\r\n")
+  end
+end

spec/functions/dos2unix_spec.rb

@@ -0,0 +1,40 @@
+require 'spec_helper'
+
+describe 'dos2unix' do
+  context 'Checking parameter validity' do
+    it { is_expected.not_to eq(nil) }
+    it do
+      is_expected.to run.with_params.and_raise_error(ArgumentError, /Wrong number of arguments/)
+    end
+    it do
+      is_expected.to run.with_params('one', 'two').and_raise_error(ArgumentError, /Wrong number of arguments/)
+    end
+    it do
+      is_expected.to run.with_params([]).and_raise_error(Puppet::ParseError)
+    end
+    it do
+      is_expected.to run.with_params({}).and_raise_error(Puppet::ParseError)
+    end
+    it do
+      is_expected.to run.with_params(1).and_raise_error(Puppet::ParseError)
+    end
+  end
+
+  context 'Converting from dos to unix format' do
+    sample_text    = "Hello\r\nWorld\r\n"
+    desired_output = "Hello\nWorld\n"
+
+    it 'should output unix format' do
+      should run.with_params(sample_text).and_return(desired_output)
+    end
+  end
+
+  context 'Converting from unix to unix format' do
+    sample_text    = "Hello\nWorld\n"
+    desired_output = "Hello\nWorld\n"
+
+    it 'should output unix format' do
+      should run.with_params(sample_text).and_return(desired_output)
+    end
+  end
+end

spec/functions/unix2dos_spec.rb

@@ -0,0 +1,40 @@
+require 'spec_helper'
+
+describe 'unix2dos' do
+  context 'Checking parameter validity' do
+    it { is_expected.not_to eq(nil) }
+    it do
+      is_expected.to run.with_params.and_raise_error(ArgumentError, /Wrong number of arguments/)
+    end
+    it do
+      is_expected.to run.with_params('one', 'two').and_raise_error(ArgumentError, /Wrong number of arguments/)
+    end
+    it do
+      is_expected.to run.with_params([]).and_raise_error(Puppet::ParseError)
+    end
+    it do
+      is_expected.to run.with_params({}).and_raise_error(Puppet::ParseError)
+    end
+    it do
+      is_expected.to run.with_params(1).and_raise_error(Puppet::ParseError)
+    end
+  end
+
+  context 'Converting from unix to dos format' do
+    sample_text    = "Hello\nWorld\n"
+    desired_output = "Hello\r\nWorld\r\n"
+
+    it 'should output dos format' do
+      should run.with_params(sample_text).and_return(desired_output)
+    end
+  end
+
+  context 'Converting from dos to dos format' do
+    sample_text    = "Hello\r\nWorld\r\n"
+    desired_output = "Hello\r\nWorld\r\n"
+
+    it 'should output dos format' do
+      should run.with_params(sample_text).and_return(desired_output)
+    end
+  end
+end