reading binary files in ruby

Let's say you have a binary file filled with a bunch of doubles:

File.open("file_name","r") do |file|
  while !file.eof?
    puts file.read(8).unpack('D')[0]
  end
end

create a local svn repository

adapted from here

copy project1/ to project1_cp/
remove hidden files, other crap from project1

in e.g. /home/XXX/svnrep:

svnadmin create project1
svn import /path/to/project1 file:///home/XXX/svnrep/project1/trunk -m "Initial import"
rm -rf /path/to/project1
svn co file:///home/XXX/svnrep/project1/trunk /path/to/project1

verify that project1 builds and works, then remove project1_cp

dry-run svn up

See if a svn up will lead to any conflicts:

svn merge --dry-run -r BASE:HEAD .

Alias this (csh):

alias svnupdry 'svn merge --dry-run -r BASE:HEAD .'

ignore whitespace in svn diff

svn diff -x -w

the -x indicates that the next option is an argument for the svn internal diff implementation

other options:

-u (--unified):
   Output 3 lines of unified context.
-b (--ignore-space-change):
   Ignore changes in the amount of white space.
-w (--ignore-all-space):
   Ignore all white space.
--ignore-eol-style:
   Ignore changes in EOL style.
-p (--show-c-function):
   Show C function name in diff output.