Version 0.2.0: RDB_ICASE, Changelog, --version, angepasste Man-Pages

lib/rdb.rb

@@ -7,6 +7,7 @@ require 'open3'
 require 'date'
 require 'tmpdir'
 require 'fileutils'
+require_relative 'rdb/version'
 
 module Rdb
   ROOT = File.expand_path('..', __dir__)
@@ -16,6 +17,21 @@ module Rdb
   COMMANDS = {}
 
   class << self
+    # RDB_ICASE=1 makes column names match without regard to case.  An exact
+    # match always wins; several case-insensitive matches are an error.
+    def icase?
+      !%w[0 no false].include?(ENV['RDB_ICASE'].to_s.downcase) && !ENV['RDB_ICASE'].to_s.empty?
+    end
+
+    def column_index(head, name)
+      exact = head.index(name)
+      return exact if exact || !icase?
+
+      hits = head.each_index.select { |i| head[i].casecmp?(name) }
+      die "column name '#{name}' is ambiguous: #{hits.map { |i| head[i] }.join(', ')}" if hits.size > 1
+      hits.first
+    end
+
     def die(msg)
       abort "#{File.basename($PROGRAM_NAME)}: #{msg}"
     end