Module: ShellHelpers::Export

Extended by:
Export
Included in:
ShellHelpers, Export
Defined in:
lib/shell_helpers/export.rb

Constant Summary collapse

ImportError = 
Class.new(StandardError)
ExportError = 
Class.new(StandardError)

Instance Method Summary collapse

Instance Method Details

#escape_name(name, prefix: "", upcase: true) ⇒ Object 



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# File 'lib/shell_helpers/export.rb', line 48

def escape_name(name, prefix:"", upcase: true)
	name=name.to_s
	name=name.upcase if upcase
	(prefix+name).gsub('/','_')
end

#export_parse(hash, s) ⇒ Object

export_parse(hash,"name:value") will output name=$(hash[value]) special cases: when value = '/' we return the full hash when value ends by /, we return the splitted hash (and name serves as a prefix) Ex: Numenor ~ $ ./mine/00COMPUTERS.rb --export=// HOSTNAME=Numenor; HOSTTYPE=perso; HOMEPATH=/home/dams;... Numenor ~ $ ./mine/00COMPUTERS.rb --export=syst/ LAPTOP=true; ARCH=i686;... Remark: in name:value, we don't put name in uppercase But in split hash mode, we put the keys in uppercase (to prevent collisions)



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# File 'lib/shell_helpers/export.rb', line 110

def export_parse(hash,s)
	r=""
	args=DR::SimpleParser.parse_string(s.to_s)
	args[:values].each do |k,v|
		if v
			name=k.to_s
		else
			#no name given
			v=k.to_s
			if v !='/' && v[-1]=='/'
				#in split mode we don't need the name
				name="" 
			else
				#else since no name was given we reuse the variable
				name=v
				name="all" if v=="/"
			end
		end
		if v != '/' && v[-1]=='/'
			all=true
			v=v[0...-1]
		end
		value=hash.keyed_value(v)
		opts=args[:opts][k]
		if all
			r+=export_variables(value, prefix: name, **opts)
		else
			r+=export_variable(name,value, **opts)
		end
	end
	return r
end

#export_value(v) ⇒ Object

export a value for SHELL consumption



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# File 'lib/shell_helpers/export.rb', line 11

def export_value(v)
	case v
		when String
			return v.shellescape
		when Array
			return "(#{v.map {|i| i.to_s.shellescape}.join(' ')})"
		when Hash
			return "(#{v.map {|k,v| k.to_s.shellescape+" "+v.to_s.shellescape}.join(' ')})"
		when nil
			return ""
		when ->(x){x.respond_to?(:to_a)}
			return export_value(v.to_a)
		when ->(x){x.respond_to?(:to_h)}
			return export_value(v.to_h)
		else
			return v.to_s.shellescape
	end
end

#export_variable(name, value, local: false, export: false, prefix: "", upcase: true) ⇒ Object

export_variable("ploum","plam") yields ploum="plam"



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# File 'lib/shell_helpers/export.rb', line 55

def export_variable(name, value, local: false, export: false, prefix:"",upcase:true)
	r=""
	name=escape_name(name,prefix:prefix,upcase:upcase)
	r+="local #{name}\n" if local
	r+="typeset -A #{name}\n" if Hash === value
	r+="#{name}=#{export_value(value)}\n"
	r+="export #{name}\n" if export
	return r
end

#export_variables(hash, inline: false, local: false, export: false, prefix: "", upcase: true) ⇒ Object

from plim return something like PLOUM=plim that can be evaluated by the shell



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# File 'lib/shell_helpers/export.rb', line 85

def export_variables(hash, inline: false, local: false, export: false, prefix:"",upcase:true)
	names=hash.keys.map {|s| escape_name(s,prefix:prefix,upcase:upcase)}
	r=""
	r+="local #{names.join(" ")}\n" if local
	r+=hash.map do |k,v|
		export_variable(k,v,prefix:prefix,upcase:upcase).chomp
	end.join(inline ? " " : "\n") + (inline ? "" : "\n")
	r+="export #{names.join(" ")}\n" if export
	return r
end

#import_parse(s, split_on: :auto, var_separator: '/', inline: false) ⇒ Object 



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# File 'lib/shell_helpers/export.rb', line 143

def import_parse(s, split_on: :auto, var_separator:'/', inline: false)
	r={}
	if split_on == :auto
		split_on=","
		split_on="\n" if s =~ /\n/
	end
	if s.is_a?(Enumerable)
		instructions=s
	else
		instructions=s.split(split_on)
	end
	instructions.each do |namevalue|
		if inline
			name,value=DR::SimpleParser.parse_namevalue(optvalue,sep:'=')
		else
			name,value=import_variable(namevalue)
		end
		if name
			r.set_keyed_value(name,value, sep: var_separator)
		else
			raise ImportError.new("Cannot parse #{s}")
		end
	end
	r
end

#import_value(v, type: String, unquote: true) ⇒ Object 



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# File 'lib/shell_helpers/export.rb', line 29

def import_value(v, type: String, unquote: true)
	#String === String => false
	case type.to_s
	when "String"
		v.gsub!(/\A['"]+|['"]+\Z/, "") if unquote
		v.to_s
	when "Integer"
		v.to_i
	when "Symbol"
		v.to_sym
	when "Array"
		#v is of the form (ploum plam)
		#TODO: handle quotes in the array
		eval "%w#{v}"
	when "Hash"
		import_value(v, type: Array).each_slice(2).to_h
	end
end

#import_variable(namevalue, downcase: true, type: :auto) ⇒ Object 



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# File 'lib/shell_helpers/export.rb', line 65

def import_variable(namevalue, downcase:true, type: :auto)
	namevalue.match(/(local|export)?\s*(\S*)=(.*)$/) do |m|
		_match,_type,name,value=m.to_a
		name=name.downcase if downcase
		if type == :auto
			if value=~/^\(.*\)$/
				value=import_value(value, type: Array)
			else
				value=import_value(value)
			end
		else
			value=import_value(value, type: type)
		end
		return name, value
	end
end