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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Join libchewing Development</title>
<meta name="description" content="">
<meta name="author" content="ChangZhuo Chen (https://github.com/czchen)">
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<link rel="stylesheet" href="css/reveal.min.css">
<link rel="stylesheet" href="css/theme/default.css" id="theme">
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<link rel="stylesheet" href="lib/css/zenburn.css">
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<script>
document.write( '<link rel="stylesheet" href="css/print/' + ( window.location.search.match( /print-pdf/gi ) ? 'pdf' : 'paper' ) + '.css" type="text/css" media="print">' );
</script>
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<script src="lib/js/html5shiv.js"></script>
<![endif]-->
</head>
<body>
<div class="reveal">
<!-- Any section element inside of this container is displayed as a slide -->
<div class="slides">
<section>
<h1>Joining libchewing Development</h1>
<p>ChangZhuo Chen (<a href="mailto:czchen@gmail.com">czchen@gmail.com</a>)</p>
<p><a href="http://coscup.org/2013/zh-tw/">COSCUP 2013</a></p>
</section>
<section>
<h1>LICENSE</h1>
<p><a href="http://creativecommons.org/licenses/by-sa/3.0/">CC-BY-SA 3.0</a></p>
</section>
<section>
<h2>先廣告一下</h2>
<ul>
<li>有新的 release <a href="http://chewing.im/post-2013-07-28_libchewing-0_3_5.html">0.3.5</a></li>
<li>有新的 domain (<a href="http://chewing.im/">http://chewing.im/</a>)</li>
<li>有新的 <a href="https://github.com/chewing/libchewing/issues">bugs</a></li>
<li>需要新的 contributors</li>
</ul>
<aside class="notes">
<ul>
<li>7/28 0.3.5 release</li>
<li>8/2 first bug after release</li>
<li>8/3 new doamin online</li>
<li>8/4 need new contributor</li>
</ul>
</aside>
</section>
<section>
<p>One day in <a href="http://www.hackingthursday.org/">Hacking Thursday</a></p>
<ul>
<li>czchen: 新酷音這部份的 code 是作啥用的阿</li>
<li>kanru: 現在有個 feature ...</li>
<li>czchen: ...</li>
</ul>
</section>
<section>
<p>coding → building → testing → coding → ...</p>
</section>
<section>
<p>Send pull request</p>
<img src="images/pull_14.png" alt="pull request 14">
</section>
<section>
<p>感覺 Unit Test 有點少，會不會改出問題阿？</p>
<img src="images/old_test.png">
</section>
<section>
<a href="https://github.com/chewing/libchewing/issues/26">https://github.com/chewing/libchewing/issues/26</a>
<img src="images/issue_26.png">
</section>
<section>
<p>coding → building → testing → coding → ...</p>
</section>
<section>
<p>Fixed</p>
<img src="images/issue_26_fix.png">
</section>
<section>
<p>為了避免再次發生問題，來研究一下 Unit Test 吧</p>
</section>
<section>
<p>先加個 coverage report</p>
<p><a href="http://qualityhour.wordpress.com/2012/01/29/test-coverage-tutorial-for-cc-autotools-projects/">Test Coverage Tutorial for C/C++ Autotools Projects</a>
<pre><code data-trim contenteditable>
dnl Enable gcov for coverage test
AC_ARG_ENABLE(
[gcov],
AS_HELP_STRING(
[--enable-gcov],
[Turn on gcov support @<:@default=no@:>@]),
AS_CASE(
[${enableval}],
[yes], [ENABLE_GCOV="true"],
[ENABLE_GCOV="false"]),
[ENABLE_GCOV="false"])
AS_IF([test x$ENABLE_GCOV = x"true"],
[AM_CFLAGS="$AM_CFLAGS --coverage"])
</code></pre>
</section>
<section>
<p><a href="http://kanru.info/chewing/lcov-check/">http://kanru.info/chewing/lcov-check/</a></p>
<img src="images/initial_coverage.png">
</section>
<section>
<p>看起來有點弱阿，應該要強化一下</p>
<p>那就先寫一些 Unit Test 順便熟悉一下 libchewing 的 API 吧</p>
</section>
<section>
<p>先隨邊抓幾個 API 來看看</p>
<pre><code data-trim contenteditable>
CHEWING_API void chewing_set_candPerPage(ChewingContext *ctx, int n)
{
ctx->data->config.candPerPage = n;
}
CHEWING_API int chewing_get_candPerPage(ChewingContext *ctx)
{
return ctx->data->config.candPerPage;
}
</code></pre>
</section>
<section>
<p>candidate per page 沒有參數檢查？這樣會出事吧</p>
</section>
<section>
<p>查了一下 code，預設 candidate per page 是 0</p>
<p>divide by zero by default</p>
</section>
<section>
<p>修改預設值通常會造成一些問題，要小心修改，不過 ...</p>
<p></p>
<ul>
<li>candidate per page (0 → 10)</li>
<li>preedit buffer (0 → 39)</li>
<li>default select key (\0 * 10 → 1234567890)</li>
</ul>
</section>
<section>
<p>加上 unit test helper</p>
<pre><code data-trim contenteditable>
commit e0546eb4a9fd53dc6c407446f42fc7f792e74e20
Author: ChangZhuo Chen <czchen@gmail.com>
Date: Fri Oct 26 18:42:18 2012 +0800
Add libtest for unit test
</code></pre>
</section>
<section>
<p>順便把改過的 API 都加上 unit test</p>
<pre><code data-trim contenteditable>
for (i = 0; i < ARRAY_SIZE(VALUE); ++i) {
chewing_set_candPerPage(ctx, VALUE[i]);
ok(chewing_get_candPerPage(ctx) == VALUE[i],
"candPerPage shall be `%d'", VALUE[i]);
// mode shall not change when set mode has invalid value.
for (j = 0; j < ARRAY_SIZE(INVALID_VALUE); ++j) {
chewing_set_candPerPage(ctx, INVALID_VALUE[j]);
ok(chewing_get_candPerPage(ctx) == VALUE[i],
"candPerPage shall be `%d'", VALUE[i]);
}
}
</code></pre>
</section>
<section>
<p>看起來好多了</p>
<p><a href="https://drone.io/github.com/chewing/libchewing/files">https://drone.io/github.com/chewing/libchewing/files</a></p>
<img src="images/coverage.png">
</section>
<section>
<p>接下來修一下 Windows build</p>
</section>
<section>
<p><a href="http://sourceforge.net/projects/mingw/files/Installer/mingw-get-inst/">MinGW - Minimalist GNU for Windows</a></p>
<p>用起來很簡單，只要 s/apt/mingw/</p>
<pre><code data-trim contenteditable>
mingw-get install automake
mingw-get install autoconf
mingw-get install libtool
./autogen.sh
./configure
make
</code></pre>
</section>
<section>
<p>有些小問題需要注意一下</p>
<p>CR/LF → LF</p>
<pre><code data-trim contenteditable>
git config core.autocrlf input
rm -rf *
git reset --hard
</code></pre>
<p>Windows 顯示亂碼</p>
<pre><code data-trim contenteditable>
chcp 65001
</code></pre>
</section>
<section>
<p>在 Windows 上，應該要試試看 Visual Studio，不過又不想把 Visual Studio 的 project files 放到 git 上</p>
</section>
<section>
<p>那試試看用 CMake 好了</p>
</section>
<section>
<p>不過我不會 CMake，先抓個 <a href="http://www.cmake.org/cmake/help/cmake_tutorial.html">tutorial</a> 來看看吧</p>
<p><img src="images/cmake_tutorial.png"></p>
</section>
<section>
<p>看起來只要把 build process 依照 CMake 的方式寫出來就好</p>
</section>
<section>
<p>libchewing build process</p>
<img src="images/build.png">
</section>
<section>
<p>依照 <a href="http://www.cmake.org/cmake/help/documentation.html">CMake manual</a> 上的說明把對應的 command 找出來</p>
<img src="images/build_cmake.png">
</section>
<section>
<p>會遇到一些問題，不過大致上是可以 build 的</p>
<p><a href="https://github.com/chewing/libchewing/issues/40">[Issue 40] cmake cannot build gen_keystroke</a></p>
<p></p>
</section>
<section>
<p>那試試看在 Windows 上用 Visual Studio Express 2012</p>
</section>
<section>
<p>當然，不能 build</p>
<p>要把 source 中 Visual Studio 不 support 的部份改掉</p>
</section>
<section>
<p>修改 tools 的 output directory</p>
<pre><code data-trim contenteditable>
add_executable(sort ${TOOLS_SRC_DIR}/sort.c $<TARGET_OBJECTS:common>)
add_executable(maketree ${TOOLS_SRC_DIR}/maketree.c)
set_target_properties(${ALL_TOOLS} PROPERTIES
RUNTIME_OUTPUT_DIRECTORY ${TOOLS_BIN_DIR}
RUNTIME_OUTPUT_DIRECTORY_DEBUG ${TOOLS_BIN_DIR}
RUNTIME_OUTPUT_DIRECTORY_MINSIZEREL ${TOOLS_BIN_DIR}
RUNTIME_OUTPUT_DIRECTORY_RELEASE ${TOOLS_BIN_DIR}
RUNTIME_OUTPUT_DIRECTORY_RELWITHDEBINFO ${TOOLS_BIN_DIR}
)
</code></pre>
</section>
<section>
<p>把 UTF-8 string 改成 \xAA 的形式</p>
<p><a href="http://www.nubaria.com/en/blog/?p=289">Using UTF-8 as the internal representation for strings in C and C++ with Visual Studio</a></p>
<pre><code data-trim contenteditable>
"好萊塢" → "\xE5\xA5\xBD\xE8\x90\x8A\xE5\xA1\xA2" /* 好萊塢 */
</code></pre>
</section>
<section>
<p>拿掉 designated initializer</p>
<p><a href="http://social.msdn.microsoft.com/Forums/en-US/vclanguage/thread/363d81f6-2308-492d-b530-2614b333e9e0/#aeece11a-ce75-434a-b140-cb54356d904e">C99 Designated Initializers support</a></p>
<img src="images/visual_studio_designated_initializer.png">
<pre><code data-trim contenteditable>
static const ChewingConfigData DEFAULT_CONFIG = {
.candPerPage = MAX_SELKEY,
.selKey = { '1', '2', '3', '4', '5', '6', '7', '8', '9', '0' },
};
</code></pre>
</section>
<section>
<p>然後就可以用了</p>
<pre><code data-trim contenteditable>
cmake PATH -G "Visual Studio 11 Win64"
</code></pre>
<img src="images/Visual_Studio_Solution.png">
</section>
<section>
<p>unit test 也可以用</p>
<img src="images/Visual_Studio_Testing.png">
</section>
<section>
<p>跑 kcwu 提供的 stress test script 找出問題</p>
<pre><code data-trim contenteditable>
commit 496cd753b7e6ce1e5c21fa574ce3e8d9cc07ed58
Author: Kuang-che Wu <kcwu@csie.org>
Date: Fri Jan 18 17:23:33 2013 +0800
Add script to run stress test
test/stresstest.py
</code></pre>
</section>
<section>
<p>用 <a href="http://valgrind.org/">valgrind</a> 跑所有的 test cases</p>
<pre><code data-trim contenteditable>
if(USE_VALGRIND)
find_program(VALGRIND valgrind)
if(VALGRIND)
foreach(target ${ALL_TESTCASES})
...
</code></pre>
</section>
<section>
<p>用 <a href="https://code.google.com/p/address-sanitizer/">address sanitizer</a> 跑所有的 test cases</p>
<pre><code data-trim contenteditable>
CC=clang CFLAGS+=-fsanitize=address
</code></pre>
</section>
<section>
<p>用 <a href="https://code.google.com/p/include-what-you-use/">include-what-you-use</a> 清 include</p>
<p><img src="images/include-what-you-use.png"></p>
</section>
<section>
<p>新增 API</p>
<pre><code data-trim contenteditable>
CHEWING_API void chewing_set_logger( ChewingContext *ctx,
void (*logger)( void *data, int level, const char *fmt, ... ),
void *data )
</code></pre>
</section>
<section>
<p>新增 API 要修改 library version</p>
<p>可是 autotools 和 CMake 是用不同的 format</p>
</section>
<section>
<p>autotools 的 -version-info 是用 current / revision / age</p>
</section>
<section>
<p>CMake 用 major / minor / revision</p>
<pre><code data-trim contenteditable>
set_target_properties(${LIBS} PROPERTIES
OUTPUT_NAME chewing
SOVERSION 3
VERSION 3.1.0
)
</code></pre>
</section>
<section>
<p>在 Linux 上，libchewing 的檔案名稱是 libchewing.so.major.minor.revision</p>
<pre><code data-trim contenteditable>
major = current - age
minor = age
revision = revision
</code></pre>
</section>
<section>
<p>不過在 BSD 上，公式不太一樣</p>
<p><a href="https://lists.gnu.org/archive/html/bug-libtool/2011-05/msg00007.html">bug#8765: Incorrect library versioning on *BSDs</a></p>
<pre><code data-trim contenteditable>
major = current
</code></pre>
</section>
<section>
<p>所以 ...</p>
<pre><code data-trim contenteditable>
commit 3b1805c27bbf408f29e46abc8e111993ce512b53
Author: ChangZhuo Chen <czchen@gmail.com>
Date: Sat Jun 22 20:34:35 2013 +0800
Use -version-number in libtool
</code></pre>
</section>
<section>
<p>也有遇到 cross platform issue</p>
<p>是 Sparc 上 alignment 的問題</p>
<p><a href="https://github.com/chewing/libchewing/issues/53">libchewing: FTBFS on sparc</a>
</section>
<section>
<p>修好後順便送了 patch 到 debian</p>
<p><a href="http://bugs.debian.org/709934">debian #709934</a></p>
<p><img src="images/debian_709934.png"></p>
</section>
<section>
<p>不過只 patch 到 Makefile.am，Makefile 本身忘了 patch</p>
<p><a href="http://bugs.debian.org/712883">debian #712883</a></p>
<p><img src="images/debian_712883.png"></p>
</section>
<section>
<p>不是有 -no-undefined 嗎？</p>
</section>
<section>
<p><a href="http://lists.gnu.org/archive/html/libtool/2009-03/msg00026.html">-no-undefined support for GNU/Linux</a><p>
<p><img src="images/no_undefined.png"></p>
</section>
<section>
<h2>CI Services</h2>
</section>
<section>
<ul>
<li>懶得自己跑 Unit Test</li>
<li>懶得自己跑 Coverage Report</li>
<li>懶得包 debian package</li>
</ul>
</section>
<section>
<h3>Travis CI</h3>
<p>Powered by kanru</p>
<p><a href="https://travis-ci.org/chewing/libchewing">https://travis-ci.org/chewing/libchewing</a></p>
<img src="images/travis-ci.png">
</section>
<section>
<p>只要把 <a href="https://github.com/chewing/libchewing/blob/master/.travis.yml">.travis.yml</a> 加到 project 內就可以用了</p>
</section>
<section>
<p>build matrix</p>
<pre><code data-trim contenteditable>
language: c
compiler: gcc
env: BUILD=autotools
matrix:
include:
- compiler: clang
env: BUILD=autotools CONFIGURE_OPTION=--disable-binary-data
- compiler: gcc
env: BUILD=cmake
- compiler: clang
env: BUILD=cmake CMAKE_OPTION="-DUSE_VALGRIND=no -DNO_UNDEFINED=no" CFLAGS=-fsanitize=address
- compiler: gcc
env: BUILD=cmake CMAKE_OPTION="-DENABLE_GCOV=yes -DUSE_VALGRIND=no" COVERALLS=yes
</code></pre>
</section>
<section>
<p>有下列幾種組合</p>
<ul>
<li>gcc + autotools</li>
<li>clang + autotools + disable-binary-data</li>
<li>gcc + cmake + valgrind</li>
<li>clang + cmake + address sanitizer</li>
<li>gcc + cmake + coverage report</li>
</ul>
</section>
<section>
<h3>COVERALLS</h3>
<a href="https://coveralls.io/r/chewing/libchewing">https://coveralls.io/r/chewing/libchewing</a>
<img src="images/coveralls.io.png">
</section>
<section>
<p>在 Travis CI 跑完後跑一下 coveralls 就好了</p>
<a href="https://coveralls.io/docs/cpp">https://coveralls.io/docs/cpp</a>
<pre><code data-trim contenteditable>
after_success:
- if [ x$COVERALLS == xyes ]; then coveralls ; fi
</code></pre>
</section>
<section>
<h3>drone.io</h3>
<a href="https://drone.io/github.com/chewing/libchewing">https://drone.io/github.com/chewing/libchewing</a>
<img src="images/drone.io.png">
</section>
<section>
<p>設定 Commands</p>
<pre><code data-trim contenteditable>
sudo apt-get install -qq lcov texinfo
./autogen.sh
./configure --enable-gcov
make dist
make check
scripts/lcov.sh
tar czf coveragereport.tar.gz coveragereport
</code></pre>
<p>設定 Artifacts</p>
<pre><code data-trim contenteditable>
coveragereport.tar.gz
libchewing-*.tar.gz
</code></pre>
</section>
<section>
<p>就可以產生 package 和 coverage report</p>
<a href="https://drone.io/github.com/chewing/libchewing/files">https://drone.io/github.com/chewing/libchewing/files</a>
<img src="images/drone.io.download.png">
</section>
<section>
<h3>Launchpad daily-build PPA</h3>
<p>Powered by Shawn</p>
<p><a href="https://launchpad.net/~chewing/+archive/chewing">https://launchpad.net/~chewing/+archive/chewing</a></p>
<img src="images/launchpad.net.png">
</section>
<section>
<p>只要以下步驟就可以作 Launchpad daily-build PPA</p>
<ul>
<li>Import github project to launchpad (with git protocol)</li>
<li>在 launchpad 上開一個 debianize repository</li>
<li>寫 recipe</li>
</ul>
</section>
<section>
<p>recipe</p>
<pre><code data-trim contenteditable>
# bzr-builder format 0.3 deb-version {debupstream}-chewing~{revno}
lp:libchewing
nest-part packaging lp:~chewing/libchewing/debianize debian debian
</code></pre>
</section>
<section>
<p>ubuntu 可以把 PPA 接到 <a href="https://wiki.ubuntu.com/Apport">Apport</a> 上</p>
<p><a href="http://jderose.blogspot.tw/2012/09/how-to-use-apport-in-your-daily-ppa.html">How to use Apport in your daily PPA builds</a></p>
</section>
<section>
<p>基本上把下面的 code 放到 /usr/share/apport/package-hooks/<package-name>.py 就好了</p>
<pre><code data-trim contenteditable>
def add_info(report):
report['CrashDB'] = '{"impl": "launchpad", "project": "libchewing"}'
</code></pre>
<aside class="notes">
<p>不過 ubuntu 會用執行檔來找有問題的 package</p>
<p>所以 package-name 要設成 ibus-chewing ... 等，而不是 libchewing</p>
</aside>
</section>
<section>
<p>這樣就可以直接產生 bug report 到 Launchpad 上</p>
<p><a href="https://bugs.launchpad.net/libchewing/+bug/1197795">bug report example </a></p>
<p><img src="images/launchpad.net_bug_report.png"></p>
</section>
<section>
<h2>字詞庫整理</h2>
</section>
<section>
<p>ㄍㄢˇ ㄗㄡˇ → 趕人</p>
<p><a href="https://groups.google.com/forum/#!topic/chewing-devel/tzNOjgYyzdQ">Google Group Chewing IM Development</a></p>
<p><img src="images/data_problem.png"></p>
</section>
<section>
<p>raw data 不乾淨？看來要清一下</p>
</section>
<section>
<p>raw data</p>
<ul>
<li>phone.cin + sort_word → 字庫</li>
<li>tsi.src + sort_dic → 詞庫</li>
</ul>
</section>
<section>
<p>改 sort_word 和 sort_dic 來檢查字詞庫的正確性</p>
</section>
<section>
<p>要檢查的部份如下</p>
<ul>
<li>字/詞 重複</li>
<li>同音詞有相同的 frequency</li>
<li>format 錯誤</li>
<li>注音符號錯誤</li>
<li>詞庫長度錯誤</li>
<li>詞庫發音錯誤</li>
</ul>
</section>
<section>
<p>用 sort 取代 sort_word 和 sort_dic</p>
<pre><code data-trim contenteditable>
commit 704c1eb48706abd8c458149fabb46924c5e309fc
Author: ChangZhuo Chen <czchen@gmail.com>
Date: Sun Dec 30 03:10:12 2012 +0800
Add sort to replace sort_word and sort_dic
</code></pre>
</section>
<section>
<p>接下來開始清 raw data</p>
<ul>
<li>中文發音特例</li>
<li>同音詞有相同的 frequency</li>
</ul>
</section>
<section>
<p>中文發音特例</p>
<ul>
<li><a href="https://www.moedict.tw/#好萊塢">好萊塢</a> vs <a href="https://www.moedict.tw/#塢">塢</a></li>
<li>疊字第二字轉輕聲</li>
</ul>
</section>
<section>
<p>同音詞有相同的 frequency ...</p>
</section>
<section>
<p>就 ... 裝作沒看見</p>
<pre><code data-trim contenteditable>
if (a->freq == b->freq) {
/* FIXME: shall exit(-1) when tsi.src is fixed */
//fprintf(stderr, "Phrase `%s' and `%s' have the same phone and frequency (%d).\n", a->phrase, b->phrase, a->freq);
//exit(-1);
}
</code></pre>
</section>
<section>
<h2>Windows</h2>
</section>
<section>
<p>接下來試試看 windows-chewing</p>
</section>
<section>
<p>不會 build</p>
<p>所以 ... pull request welcome</p>
</section>
<section>
<p>不過 Windows 還是要試試看</p>
<p>所以先用 <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/ms629032(v=vs.85).aspx">Text Services Framework</a> 寫個 POC 出來</p>
</section>
<section>
<p>有 sample code，應該改一下就可以用了</p>
<p><img src="images/TSF-sample.png"></p>
</section>
<section>
<p>第二個 sample 就看不懂了</p>
</section>
<section>
<p>強者我同事曾說 "MSDN 最重要的是其他人的註解"</p>
</section>
<section>
<p>好像哪裡怪怪的</p>
<p><img src="images/TSF-sample-comment.png"></p>
</section>
<section>
<p>連連看時間</p>
<p><img src="images/TSF-sample-comparison.png"></p>
</section>
<section>
<p>POC 在 <a href="https://github.com/czchen/TSF-chewing">https://github.com/czchen/TSF-chewing</a></p>
<p><img src="images/TSF-chewing.png"></p>
</section>
<section>
<h1>We are hiring</h1>
<p>Send a pull request to <a href="https://github.com/chewing/libchewing](https://github.com/chewing/libchewing">https://github.com/chewing/libchewing</a>
<p><img src="images/we_are_hiring.png"></p>
</section>
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