Class: FixTSVConflict::Resolver

Inherits:
Object
  • Object
show all
Includes:
Logging
Defined in:
lib/fix_tsv_conflict/resolver.rb

Constant Summary collapse

BLANK_RE = 
/\A[[:space:]]*\z/

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Logging

#blank, #dump, #error, #info, #log, #notice, #warn

Constructor Details

#initialize(stdin: $stdin, stderr: $stderr) ⇒ Resolver

Returns a new instance of Resolver.



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# File 'lib/fix_tsv_conflict/resolver.rb', line 19

def initialize(stdin: $stdin, stderr: $stderr)
  @stdin  = stdin
  @stderr = stderr

  @tabs = 0
end

Instance Attribute Details

#stderr ⇒ Object (readonly)

Returns the value of attribute stderr.



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# File 'lib/fix_tsv_conflict/resolver.rb', line 16

def stderr
  @stderr
end

#stdin ⇒ Object (readonly)

Returns the value of attribute stdin.



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# File 'lib/fix_tsv_conflict/resolver.rb', line 16

def stdin
  @stdin
end

#tabs ⇒ Object

Returns the value of attribute tabs.



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# File 'lib/fix_tsv_conflict/resolver.rb', line 17

def tabs
  @tabs
end

Instance Method Details

#index_by_id(lines) ⇒ Object 



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# File 'lib/fix_tsv_conflict/resolver.rb', line 87

def index_by_id(lines)
  result = {}
  lines.each do |line|
    id = line.split(TAB, 2).first
    result[id] = line
  end
  result
end

#pick_by_tabs(l, r) ⇒ Object 



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# File 'lib/fix_tsv_conflict/resolver.rb', line 96

def pick_by_tabs(l, r)
  ltabs = l.count(TAB)
  rtabs = r.count(TAB)

  if ltabs == tabs
    l
  elsif rtabs == tabs
    r
  else
    # both are wrong.
    # so this is a determistic picking.
    ltabs < rtabs ? l : r
  end
end

#resolve(conflict) ⇒ Object 



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# File 'lib/fix_tsv_conflict/resolver.rb', line 26

def resolve(conflict)
  unless conflict.valid?
    return conflict.to_a
  end

  result = try(conflict)
  if result
    return result
  end

  warn "Failed to resolve it automatically."
  select(conflict)
end

#select(conflict) ⇒ Object 



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# File 'lib/fix_tsv_conflict/resolver.rb', line 60

def select(conflict)
  text = "Which branch do you want to keep?\n\n  1) \#{conflict.lbranch}\n  2) \#{conflict.rbranch}\n  k) keep as is\n\n  TEXT\n\n  info text\n\n  loop do\n    info \"Please enter 1, 2, or k: \", no_newline: true\n    case selected = stdin.gets.strip\n    when \"1\"\n      return conflict.left\n    when \"2\"\n      return conflict.right\n    when \"k\"\n      return conflict.to_a\n    else\n      info \"Invalid input: \#{selected}\"\n    end\n  end\nend\n"

#try(conflict) ⇒ Object 



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# File 'lib/fix_tsv_conflict/resolver.rb', line 40

def try(conflict)
  result = []
  left  = index_by_id(conflict.left.reject { |l| l.blank? })
  right = index_by_id(conflict.right.reject { |r| r.blank? })
  (left.keys + right.keys).uniq.sort.each do |id|
    l = left[id]
    r = right[id]
    if l && r
      if l.rstrip == r.rstrip
        result << pick_by_tabs(l, r)
      else
        return false
      end
    else
      result << (l || r)
    end
  end
  result
end