Class: SchemaEvolutionManager::Version

Inherits:
Object
  • Object
show all
Defined in:
lib/schema-evolution-manager/version.rb

Constant Summary collapse

VERSION_FILE = 
File.join(Library.base_dir, "VERSION")

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(major, minor, micro, opts = {}) ⇒ Version

Returns a new instance of Version.



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# File 'lib/schema-evolution-manager/version.rb', line 9

def initialize(major, minor, micro, opts={})
  @major = major.to_i
  @minor = minor.to_i
  @micro = micro.to_i
  @prefix = opts.delete(:prefix) || nil
  if !opts.empty?
    raise "Invalid keys: " + opts.keys
  end
end

Instance Attribute Details

#major ⇒ Object (readonly)

Returns the value of attribute major.



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# File 'lib/schema-evolution-manager/version.rb', line 7

def major
  @major
end

#micro ⇒ Object (readonly)

Returns the value of attribute micro.



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# File 'lib/schema-evolution-manager/version.rb', line 7

def micro
  @micro
end

#minor ⇒ Object (readonly)

Returns the value of attribute minor.



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# File 'lib/schema-evolution-manager/version.rb', line 7

def minor
  @minor
end

Class Method Details

.is_valid?(version_string) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/schema-evolution-manager/version.rb', line 75

def Version.is_valid?(version_string)
  Preconditions.check_not_blank(version_string, "version_string cannot be blank")
  version_string.match(/^\w*\d+\.\d+\.\d+$/) ? true : false
end

.parse(version_string) ⇒ Object 



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# File 'lib/schema-evolution-manager/version.rb', line 19

def Version.parse(version_string)
  Preconditions.check_not_blank(version_string, "version_string cannot be blank")
  Library.assert_valid_tag(version_string)
  if md = version_string.match(/^(\w*)(\d+)\.(\d+)\.(\d+)$/)
    Version.new(md[2], md[3], md[4], :prefix => md[1])
  else
    raise "ERROR: Bug in version string parser for version[%s]" % version_string
  end
end

.read ⇒ Object

Reads the current version (from the VERSION FILE), returning an instance of the Version class



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# File 'lib/schema-evolution-manager/version.rb', line 62

def Version.read
  Preconditions.check_state(File.exist?(VERSION_FILE), "Version file at path[%s] not found" % VERSION_FILE)
  version = IO.read(VERSION_FILE).strip
  Version.parse(version)
end

.write(version) ⇒ Object 



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# File 'lib/schema-evolution-manager/version.rb', line 68

def Version.write(version)
  Preconditions.assert_class(version, Version)
  File.open(VERSION_FILE, "w") do |out|
    out << "%s\n" % version.to_version_string
  end
end

Instance Method Details

#<=>(other) ⇒ Object 



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# File 'lib/schema-evolution-manager/version.rb', line 48

def <=>(other)
  Preconditions.assert_class(other, Version)
  value = major <=> other.major
  if value == 0
    value = minor <=> other.minor
    if value == 0
      value = micro <=> other.micro
    end
  end
  value
end

#next_major ⇒ Object

Returns the next major version



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# File 'lib/schema-evolution-manager/version.rb', line 34

def next_major
  Version.new(major+1, 0, 0, :prefix => @prefix)
end

#next_micro ⇒ Object

Returns the next micro version



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# File 'lib/schema-evolution-manager/version.rb', line 44

def next_micro
  Version.new(major, minor, micro+1, :prefix => @prefix)
end

#next_minor ⇒ Object

Returns the next minor version



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# File 'lib/schema-evolution-manager/version.rb', line 39

def next_minor
  Version.new(major, minor+1, 0, :prefix => @prefix)
end

#to_version_string ⇒ Object 



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# File 'lib/schema-evolution-manager/version.rb', line 29

def to_version_string
  "%s%s.%s.%s" % [@prefix, major, minor, micro]
end