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8 <title>JaCoCo - Development Conventions</title>
9</head>
10<body>
11
12<div class="breadcrumb">
13 <a href="../index.html" class="el_report">JaCoCo</a> &gt;
14 <a href="index.html" class="el_group">Documentation</a> &gt;
15 <span class="el_source">Development Conventions</span>
16</div>
17<div id="content">
18
19<h1>Development Conventions</h1>
20
21<p>
22 Efficient team work that produces high-quality software requires a common set
23 of rules.
24</p>
25
26<h2>Consistent Source Tree</h2>
27
28<p>
Marc R. Hoffmannc72f3502016-05-18 12:41:10 +0200[diff] [blame^]29 Follow the existing coding style and formatting rules. The projects contain
30 auto-formatting rules for the Eclipse IDE.
31</p>
32
33<p>
34 Update your local branches and run the build locally before every push. Push
35 only if the build succeeds and the configured compiler settings do not show
36 any warnings in the Eclipse IDE.
Evgeny Mandrikov82a92ca2012-01-15 20:25:48 +0000[diff] [blame]37</p>
38
39<p>
40 Documentation is part of the product. Whenever you implement a new feature or
41 change existing behavior make sure to update all corresponding JavaDoc as well
42 as other documentation with the same change set. The product should always be
43 in a consistent state. For every change the following items should be checked:
44</p>
45
46<ul>
Marc R. Hoffmannc72f3502016-05-18 12:41:10 +0200[diff] [blame^]47 <li>Corresponding JavaDoc, every public type and member requires JavaDoc.</li>
Evgeny Mandrikov82a92ca2012-01-15 20:25:48 +0000[diff] [blame]48 <li>Documentation referring to the modified concepts, interfaces or
49 implementation.</li>
50 <li>New features, bug fixes and modified behavior should be enlisted in the
51 <code>org.jacoco.doc/docroot/doc/changes.html</code> file together with
52 the corresponding issue tracker id.</li>
53</ul>
54
55<h2>Design for Integration</h2>
56
57<p>
58 The primary focus of the JaCoCo project is to provide a code coverage library.
59 Integrators may want to embed JaCoCo in different tools and environments with
60 very different usage scenarios. Therefore following aspects should be considered:
61</p>
62
63<p>
64 <b>Documentation:</b> All APIs should be properly documented on different
65 levels of granularity:
66</p>
67
68<ul>
69 <li>General usage</li>
70 <li>Bundle summary</li>
71 <li>Package summary</li>
72 <li>Type description</li>
73 <li>Member description</li>
74</ul>
75
76<p>
77 <b>Proper Units:</b> All APIs and internal implementation classes should form proper
78 units with well defined responsibilities and dependencies. Each class and method
79 should focus on a single concept. It should be possible to use different aspects
80 separately.
81</p>
82
83<p>
84 <b>Abstraction:</b> All APIs must use the most general abstractions possible. For instance
85 reading binary data should rely on the <code>java.io.InputStream</code> interface, not
86 on a <code>java.io.File</code> object.
87</p>
88
89<p>
90 <b>System Dependencies:</b> Avoid any dependencies to the local file system, network
91 resources, threads, processes etc.
92</p>
93
94<h2>Test Driven Development</h2>
95
96<p>
97 All code added to JaCoCo should have corresponding JUnit test cases. Ideally tests
98 are developed before or along with the actual implementation:
99</p>
100
101<ul>
102 <li>Every new feature should be verified by test cases.</li>
103 <li>Modified behavior should also be reflected by test cases.</li>
104 <li>Ideally for every reported bug a reproducer is added to the unit tests.</li>
105</ul>
106
107<h2>Keep an Eye on License Issues</h2>
108
109<p>
110 All code included with JaCoCo must conform to the EPL license.
111</p>
112
113<ul>
114 <li>
115 Every committer and contributor must agree that all code will be published
116 under EPL. He or she must be the original author and must have the
117 permission to contribute code to JaCoCo, for example if such a permission
118 is required by the employer.
119 </li>
120 <li>
121 Every third party content must be enlisted in the corresponding
122 <code>about.html</code> file along with its license.
123 </li>
124 <li>
125 Every third party content included with the JaCoCo distribution must be
126 enlisted in the <code>org.jacoco.doc/docroot/doc/license.html</code> file
127 and the corresponding <code>about.html</code> file along with its license.
128 </li>
129 <li>
130 Every source file (Java, Build Script, DTD) must have a
131 <a href="http://www.eclipse.org/legal/copyrightandlicensenotice.php">EPL
132 license notice</a>. The initial contributor should be listed. In case of
133 significant changes or additions additional contributors should also
134 be listed.
135 </li>
136</ul>
137
Marc R. Hoffmannc72f3502016-05-18 12:41:10 +0200[diff] [blame^]138<h2>Contribution process</h2>
139
140<p>
141 All changes on the JaCoCo code base are handled via
142 <a href="https://github.com/jacoco/jacoco/pulls">GitHub pull requests</a> and
143 always reviewed by a second developer. This applies for external contributors
144 as well as for project members. Beside functional correctness every pull
145 request needs to fulfill the conventions above.
146</p>
147
148<p>
149 For external contributors the following recommendations will help the project
150 to incorporate their precious work:
151</p>
152
153<ul>
154 <li>
155 <b>Get in touch</b>: Before you start a bigger contribution
156 please get in touch through our <a href="support.html">mailing list</a> to
157 make sure the JaCoCo project considers this in scope and the approach fits
158 in the overall architecture.
159 </li>
160 <li>
161 <b>Clear scope</b>: We track and review every semantical change through a
162 separate pull request. Pull requests handling various topics ("I fixed this
163 and that") are typically difficult in handling and are therefore declined.
164 </li>
165 <li>
166 <b>No technical debt</b>: We are committed to maintain JaCoCo in the long
167 run with on a high quality level. Therefore we will not accept contributions
168 as long as they add technical debt to the project (e.g. lack of tests or
169 design issues).
170 </li>
171</ul>
172
Evgeny Mandrikov82a92ca2012-01-15 20:25:48 +0000[diff] [blame]173</div>
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