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#!/usr/bin/env escript
%% -*- erlang -*-

%% Find unused exports in a given module
%% Example: deadcode mod_foo deps/foo/ebin deps/bar/ebin
%% Assumes this script is in a file named deadcode

main([Module0|Dirs]) ->
    Module = list_to_atom(Module0),
    {ok, _Pid} = xref:start(foo),

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; Just drop this in /etc/couchdb/local.d/ and then
; start CouchDB normally.


; Here couch_node can be anything as long as it's uniq.
[os_daemons]
couch_node = /Users/davisp/tmp/couch-node.js

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-module(rr_db, [Server, PhotoRoot]).

-define(MIME_TYPE, "application/json").
-compile(export_all).

init() ->
    inets:start(),
    inets:start(httpc, [{profile, database}]).

reset() ->

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Conflict winners are chosen dynamically, every time a request for the document arrives. The revision tree is sort of like a git repository: most updates are based on a parent update. In general, you have a tree of changes, but usually it works out to a linear linked list.

Anyway, the winner is the version with the longest revision history. (That is arbitrary but deterministic, so two couches with the same revision trees will pick the same winner.)

couch_doc:to_doc_info_path does the main job: converting the revision tree into an array of paths from root to leaf. It returns this array sorted, with the longest path first. The diff here will print a log message every time the comparison function is called by lists:sort().

The execution path basically goes:

1. couch_http_db:db_doc_req()
2. couch_db:open_doc()

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Issue

On Mac OS X Lion (64bits at least), we get random "Bus error 10" (or "Segmentation fault: 11") crashes if init:restart/0 is called and the crypto application is loaded. Why? XCode 4.1 ships an OpenSSL version that deprecates many functions used by OTP's crypto NIF (lib/crypto/c_src/crypto.c).

Example:

$ erl

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require 'formula'

class Couchdb < Formula
  homepage "http://couchdb.apache.org/"
  url 'http://www.apache.org/dyn/closer.cgi?path=couchdb/1.1.1/apache-couchdb-1.1.1.tar.gz'
  md5 'cd126219b9cb69a4c521abd6960807a6'

  devel do
   url 'http://git-wip-us.apache.org/repos/asf/couchdb.git', :using => :git, :tag => '1.2.x'
   version '1.2.x'

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diff --git i/Library/Formula/couchdb.rb w/Library/Formula/couchdb.rb
index 3352b28..7c1203d 100644
--- i/Library/Formula/couchdb.rb
+++ w/Library/Formula/couchdb.rb
@@ -1,9 +1,14 @@
 require 'formula'
 
 class Couchdb < Formula
-  url 'http://www.apache.org/dyn/closer.cgi?path=couchdb/1.1.1/apache-couchdb-1.1.1.tar.gz'
   homepage "http://couchdb.apache.org/"

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#!/usr/bin/env sh

##
# This is script with usefull tips taken from:
#   https://github.com/mathiasbynens/dotfiles/blob/master/.osx
#
# install it:
#   curl -sL https://raw.github.com/gist/2108403/hack.sh | sh
#

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{
    map : function (doc) {
        if (doc.type === 'usage' && doc.service && doc.time) {
            var d = new Date(doc.time);
            var y = d.getFullYear();
            var m = d.getMonth() + 1;
            var stamp = y + '/' + m;
            
            var rec = {
                stamp : stamp,

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-module(erlbork).
-export([start/0]).
%% run using
%% erl -run erlbork
%% with or without +K true +A4
%% code from @davisp with thanks

start() ->
    spawn(fun() -> restarts() end),
    loop().