Initial revision

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@8 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 163 insertions, 0 deletions

diff --git a/lib/ftools.rb b/lib/ftools.rb
new file mode 100644
index 0000000000..59bc81b365
--- /dev/null
+++ b/lib/ftools.rb
@@ -0,0 +1,163 @@
+class << File
+
+  TOO_BIG = 1024 * 1024 * 2 # 2MB
+
+  def catname from, to
+    if FileTest.directory? to
+      to +
+	if to =~ /\\/
+	  if to[-1,1] != '\\' then '\\' end + basename(from)
+	else
+	  if to[-1,1] != '/' then '/' end + basename(from)
+	end
+    else
+      to
+    end
+  end
+
+# copy file
+
+  def syscopy from, to
+    to = catname(from, to)
+
+    fsize = size(from)
+    fsize = 1024 if fsize < 512
+    fsize = TOO_BIG if fsize > TOO_BIG
+
+    from = open(from, "r")
+    from.binmode
+    to = open(to, "w")
+    to.binmode
+
+    begin
+      while TRUE
+	r = from.sysread(fsize)
+	rsize = r.size
+        w = 0
+	while w < rsize
+	  t = to.syswrite(r[w, rsize - w])
+	  w += t
+	end
+      end
+    rescue EOFError
+      ret = TRUE
+    rescue
+      ret = FALSE
+    ensure
+      to.close
+      from.close
+    end
+    ret
+  end
+
+  def copy from, to, verbose = FALSE
+    $stderr.print from, " -> ", catname(from, to), "\n" if verbose
+    syscopy from, to
+  end
+
+  alias cp copy
+
+# move file
+
+  def move from, to, verbose = FALSE
+    to = catname(from, to)
+    $stderr.print from, " -> ", to, "\n" if verbose
+
+    if PLATFORM =~ /djgpp|cygwin32|mswin32/ and FileTest.file? to
+      unlink to
+    end
+    begin
+      rename from, to
+    rescue
+      syscopy from, to and unlink from
+    end
+  end
+
+  alias mv move
+
+#  compare two files
+#   TRUE:  identical
+#   FALSE: not identical
+
+  def compare from, to, verbose = FALSE
+    $stderr.print from, " <=> ", to, "\n" if verbose
+    fsize = size(from)
+    fsize = 1024 if fsize < 512
+    fsize = TOO_BIG if fsize > TOO_BIG
+
+    from = open(from, "r")
+    from.binmode
+    to = open(to, "r")
+    to.binmode
+
+    ret = FALSE
+    fr = tr = ''
+
+    begin
+      while fr == tr
+	if fr = from.read(fsize)
+	  tr = to.read(fr.size)
+	else
+	  ret = !to.read(fsize)
+	  break
+	end
+      end
+    rescue
+      ret = FALSE
+    ensure
+      to.close
+      from.close
+    end
+    ret
+  end
+
+  alias cmp compare
+
+#  unlink files safely
+
+  def safe_unlink(*files)
+    verbose = if files[-1].is_a? String then FALSE else files.pop end
+    begin
+      $stderr.print files.join(" "), "\n" if verbose
+      chmod 0777, *files
+      unlink *files
+    rescue
+#      STDERR.print "warning: Couldn't unlink #{files.join ' '}\n"
+    end
+  end
+
+  alias rm_f safe_unlink
+
+  def makedirs(*dirs)
+    verbose = if dirs[-1].is_a? String then FALSE else dirs.pop end
+#    mode = if dirs[-1].is_a? Fixnum then dirs.pop else 0755 end
+    mode = 0755
+    for dir in dirs
+      next if FileTest.directory? dir
+      parent = dirname(dir)
+      makedirs parent unless FileTest.directory? parent
+      $stderr.print "mkdir ", dir, "\n" if verbose
+      Dir.mkdir dir, mode
+    end
+  end
+
+  alias mkpath makedirs
+
+  alias o_chmod chmod
+
+  def chmod(mode, *files)
+    verbose = if files[-1].is_a? String then FALSE else files.pop end
+    $stderr.printf "chmod %04o %s\n", mode, files.join(" ") if verbose
+    o_chmod mode, *files
+  end
+
+  def install(from, to, mode, verbose)
+    to = catname(from, to)
+    unless FileTest.exist? to and cmp from, to
+      cp from, to, verbose
+      chmod mode, to, verbose if mode
+    end
+  end
+
+end
+# vi:set sw=2: