Module: Smash::CloudPowers::Zenv

Includes:
Helper
Included in:
AwsResources, SelfAwareness
Defined in:
lib/cloud_powers/zenv.rb

Overview

This module provides some environment variable management and functionality System ENV, dotenv ENV and instance variables are considered for now but this will also use elasticache/redis...some other stuff too, in the coming weeks

Instance Method Summary collapse

Methods included from Helper

#attr_map!, #called_from, #create_logger, #errors, #format_error_message, #log_file, #logger, #smart_retry, #task_path, #task_require_path, #to_camel, #to_i_var, #to_pascal, #to_ruby_file_name, #to_snake, #update_message_body

Methods included from Auth

creds

Instance Method Details

#env_vars(key = '') ⇒ Object

Search through the .env variables for a key or if no key is given, return all the .env-vars and their values



42
43
44
45
 
# File 'lib/cloud_powers/zenv.rb', line 42

def env_vars(key = '')
  return ENV if key.empty?
  ENV[to_snake(key).upcase]
end

#i_vars(key = '') ⇒ Object

Search through the instance variables for a key or if no key is given, return all the i-vars and their values @params: [key <String]: The key to search for @return:



31
32
33
34
35
36
37
38
 
# File 'lib/cloud_powers/zenv.rb', line 31

def i_vars(key = '')
  if key.empty?
    return self.instance_variables.inject({}) do |r,v|
      r.tap { |h| h[to_snake(v)] = self.instance_variable_get(to_i_var(v)) }
    end
  end
  self.instance_variable_get(to_i_var(key))
end

#project_root ⇒ Object

PROJECT_ROOT should be set as early as possible in this Node's initilize method. This method tries to search for it, using #zfind() and if a nil result is returned from that search, pwd is used as the PROJECT_ROOT. @return: Path to the project root or where ever pwd resolves to TODO: improve this...it needs to find the gem's method's caller's project root or at least the gem's method's caller's file's location.



77
78
79
80
81
82
83
84
 
# File 'lib/cloud_powers/zenv.rb', line 77

def project_root
  if @project_root.nil?
    pr = (PROJECT_ROOT rescue nil) or zfind('PROJECT_ROOT') or system('pwd')
    @project_root = Pathname.new(pr)
  else
    @project_root
  end
end

#project_root=(var) ⇒ Object

Manually set the @project_root i-var as a Pathname object. @param: New path to the project root <String|Pathname> @return: @project_root 



89
90
91
 
# File 'lib/cloud_powers/zenv.rb', line 89

def project_root=(var)
  @project_root = Pathname.new(var)
end

#system_vars(key = '') ⇒ Object

Search through the system environment variables for a key or if no key is given, return all the system-env-vars and their values @params: [key ]: The key to search for @return: Value for the given key or if no key was given, a Hash with { key => value, ... } is returned for all keys with a value. Keys with no value are ommitted from the result.



53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
 
# File 'lib/cloud_powers/zenv.rb', line 53

def system_vars(key = '')
  if key.empty?
    # Separate key-value pairs from the large string received by `ENV`
    separate_pairs = `ENV`.split(/\n/).map do |string_pair|
      string_pair.split('=')
    end
    # Separate key-value pairs from each other into a hash of
    # { key => value, other_key => other_value }
    #   * keys with no value are removed
    separate_pairs.inject({}) do |res, pair|
      res.tap { |h_res| h_res[pair.first] = pair.last unless (pair.first == pair.last) }
    end
  else
    res = `printf "#{to_snake(key).upcase}"`
    return res.empty? ? nil : res
  end
end

#zfind(key) ⇒ Object

ZFind looks for the key in a preditermined order of importance:

* i-vars are considered first becuase they might be tracking different
locations for multiple tasks or something like that.
* dotenv files are second because they were manually set, so for sure
it's important
* System Env[@] variables are up next.  Hopefully by this time we've found
our information but if not, it should "search" through the system env too.

@params: key : The key to search for @return: TODO: implement a search for all 3 that can find close matches



20
21
22
23
24
25
 
# File 'lib/cloud_powers/zenv.rb', line 20

def zfind(key)
  res = (i_vars[to_snake(key).upcase] or
    env_vars[to_snake(key).upcase] unless @project_root.nil?) or
    system_vars[to_snake(key).upcase]
  (res.nil? or res.empty?) ? nil : res
end