問題描述：參照google文檔說明：http://source.android.com/source/downloading.html 一步一步設置，
$ curl https://dl-ssl.google.com/dl/googlesource/git-repo/repo > ~/bin/repo $ chmod a+x ~/bin/repo
$ mkdir WORKING_DIRECTORY $ cd WORKING_DIRECTORY
$ repo init -u https://android.googlesource.com/platform/manifest -b android-4.0.1_r1
$ repo sync
一切很順利，只是每次下到5G左右后就結束了：
log大致如下：
然后界面就一直停在這，第一次下android源碼，也不知道怎么才算成功，看這提示貌似成功了，到源碼目錄ls一下，傻眼了 啥也沒有，空空如也，再ll，有一個.repo文件夾，這個文件夾的文件大小大約就5G，也就是說我下了半天就只下了個.repo文件夾。
找log，沒有發現任何異常，google一遍，基本上大家都是按google官方文檔步驟就下載成功了，遇到的一些問題跟我的情況也都不一致，
抑郁了，反復看http://source.android.com/source/downloading.html 里的描述，也沒發現什么，無奈之下，查了一遍軟件版本：
repo --version
... A new repo command ( 1.18) is available.
... You should upgrade soon:
cp /home/xxxx/bin/.repo/repo/repo /home/xxxx/bin/repo
repo version v1.11.1
(from https: // gerrit.googlesource.com/git-repo)
repo launcher version 1.17
(from /home/xxxx/bin/repo)
git version 1.7.5.4
Python 2.7.2+ ( default, Jul 20 2012, 22:15:08)
[GCC 4.6.1]
gnu make 版本：
GNU Make 3.81
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
This program built for x86_64-pc-linux-gnu
我的jdk版本是1.6 看這版本也符合，google文檔要求的版本為：
Detailed instructions for Ubuntu and MacOS follow. In general you will need:
Python 2.5 -- 2.7, which you can download from python.org.
GNU Make 3.81 -- 3.82, which you can download from gnu.org,
JDK 6 if you wish to build Gingerbread or newer; JDK 5 for Froyo or older. You can download both from java.sun.com.
Git 1.7 or newer. You can find it at git-scm.com.
這一切都符合，只有結果不符合。
看看真個過程，似乎都很完美，只是有一個提示：
... You should upgrade soon:
google文檔里沒有說要求repo的版本，我的repo版本是1.17
看到有這么個提示，想想把repo升級了看看吧。
於是使用如下命令：
repo init --repo-url https://android.googlesource.com/tools/repo -u http://android.googlesource.com/platform/manifest -b android-2.3.3_r1
這個命令比google文檔里的多了一個參數：
--repo-url https://android.googlesource.com/tools/repo
它強制升級repo版本，
重新下載一遍，我成功的看到以下日志：
* [ new branch] ics-plus-aosp -> aosp/ics-plus-aosp
f37f794..f6e5b79 jb-dev -> aosp/jb-dev
* [ new branch] jb-mr0-release -> aosp/jb-mr0-release
f787b1d..1e1589a jb-release -> aosp/jb-release
* [ new tag] android-4.1.1_r1 -> android-4.1.1_r1
* [ new tag] android-4.1.1_r1.1 -> android-4.1.1_r1.1
* [ new tag] android-4.1.1_r2 -> android-4.1.1_r2
* [ new tag] android-4.1.1_r3 -> android-4.1.1_r3
* [ new tag] android-4.1.1_r4 -> android-4.1.1_r4
* [ new tag] android-4.1.1_r5 -> android-4.1.1_r5
* [ new tag] android-4.1.1_r6 -> android-4.1.1_r6
* [ new tag] android-4.1.1_r6.1 -> android-4.1.1_r6.1
* [ new tag] android-4.1.2_r1 -> android-4.1.2_r1
* [ new tag] android-cts-4.1_r1 -> android-cts-4.1_r1
Fetching projects: 100% (165/165), done.
Checking out files: 100% (4679/4679), done.out files: 45% (2126/4679)
Checking out files: 100% (4573/4573), done.out files: 15% (696/4573)
Checking out files: 100% (10008/10008), done.t files: 2% (287/10008)
Checking out files: 100% (11980/11980), done.t files: 0% (6/11980)
Checking out files: 100% (5169/5169), done. out files: 49% (2544/5169)
Checking out files: 100% (985/985), done.ng out files: 10% (105/985)
Checking out files: 100% (297/297), done.ng out files: 2% (8/297)
Checking out files: 100% (684/684), done.ng out files: 41% (283/684)
Checking out files: 100% (9601/9601), done. out files: 1% (172/9601)
Checking out files: 100% (1328/1328), done.
Syncing work tree: 100% (165/165), done.
查看源碼目錄，多了幾個工程：
bionic bootable build cts dalvik development device external frameworks hardware libcore Makefile ndk packages prebuilt sdk system