本篇分享如何使用 Gcov 和 LCOV 对 C/C++ 项目进行代码覆盖率的度量。

如果你想了解代码覆盖率工具 Gcov 是如何工作的，或是以后需要做 C/C++ 项目的代码覆盖率，希望本篇对你有所帮助。

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Backgroud

In my opinion, SonarQube is not a very easy setup DevOps tool to compare with Jenkins, Artifactory. You can’t just run some script under the bin folder to let the server boot up.

You must have an installed database, configuration LDAP in the config file, etc.

So I’d like to document some important steps for myself, like setup LDAP or PostgreSQL when I install SonarQube of v9.0.1. It would be better if it can help others.

Prerequisite and Download

1. Need to be installed JRE/JDK 11 on the running machine.

   Here is the prerequisites overview: https://docs.sonarqube.org/latest/requirements/requirements/

2. Download SonarQube: https://www.sonarqube.org/downloads/

   cd sonarqube/ ls wget https://binaries.sonarsource.com/Distribution/sonarqube/sonarqube-9.0.1.46107.zip unzip sonarqube-9.0.1.46107.zip cd sonarqube-9.0.1.46107/bin/linux-x86-64 sh sonar.sh console

Change Java version

I installed SonarQube on CentOS 7 machine, the Java version is OpenJDK 1.8.0_242 by default, but the prerequisite shows at least need JDK 11. There is also JDK 11 available on my machine, so I just need to change the Java version.

I recommend using the alternatives command change Java version，refer as following:

$ java -version
openjdk version "1.8.0_242"
OpenJDK Runtime Environment (build 1.8.0_242-b08)
OpenJDK 64-Bit Server VM (build 25.242-b08, mixed mode)

$ alternatives --config java

There are 3 programs which provide 'java'.

  Selection    Command
-----------------------------------------------
   1           java-1.7.0-openjdk.x86_64 (/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.251-2.6.21.1.el7.x86_64/jre/bin/java)
*+ 2           java-1.8.0-openjdk.x86_64 (/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.242.b08-1.el7.x86_64/jre/bin/java)
   3           java-11-openjdk.x86_64 (/usr/lib/jvm/java-11-openjdk-11.0.12.0.7-0.el7_9.x86_64/bin/java)

Enter to keep the current selection[+], or type selection number: 3
$ java -version
openjdk version "11.0.12" 2021-07-20 LTS
OpenJDK Runtime Environment 18.9 (build 11.0.12+7-LTS)
OpenJDK 64-Bit Server VM 18.9 (build 11.0.12+7-LTS, mixed mode, sharing)

Install Database

SonarQube needs you to have installed a database. It supports several database engines, like Microsoft SQL Server, Oracle, and PostgreSQL. Since PostgreSQL is open source, light, and easy to install, so I choose PostgreSQL as its database.

How to download and install PostgreSQL please see this page: https://www.postgresql.org/download/linux/redhat/

Troubleshooting

1. How to establish a connection with SonarQube and PostgreSQL

Please refer to the sonar.properties file at the end of this post.

2. How to setup LDAP for users to log in

sonar.security.realm=LDAP
ldap.url=ldap://den.exmaple-org:389
ldap.bindDn=user@exmaple-org.com
ldap.bindPassword=mypassword
ldap.authentication=simple
ldap.user.baseDn=DC=exmaple-org,DC=com
ldap.user.request=(&(objectClass=user)(sAMAccountName={login}))
ldap.user.realNameAttribute=cn
ldap.user.emailAttribute=email

3. How to fix LDAP login SonarQube is very slowly

Comment out ldap.followReferrals=false in sonar.properties file would be help.

Related post: https://community.sonarsource.com/t/ldap-login-takes-2-minutes-the-first-time/1573/7

4. How to fix ‘Could not resolve 11 file paths in lcov.info’

I want to display Javascript code coverage result in SonarQube, so I added sonar.javascript.lcov.reportPaths=coverage/lcov.info to the sonar-project.properties

But when I run sonar-scanner.bat in the command line, the code coverage result can not show in sonar. I noticed the following error from the output:

INFO: Analysing [C:\workspace\xvm-ide\client\coverage\lcov.info]
WARN: Could not resolve 11 file paths in [C:\workspace\xvm-ide\client\coverage\lcov.info]

There are some posts related to this problem, for example, https://github.com/kulshekhar/ts-jest/issues/542, but no one works in my case.

# here is an example error path in lcov.info
..\src\auto-group\groupView.ts

Finally, I have to use the sed command to remove ..\ in front of the paths before running sonar-scanner.bat, then the problem was solved.

sed -i 's/\..\\//g' lcov.info

Please comment if you can solve the problem with changing options in the tsconfig.json file.

4. How to output to more logs

To output more logs, change sonar.log.level=INFO to sonar.log.level=DEBUG in below.

Note: all above changes of sonar.properties need to restart the SonarQube instance to take effect.

Final sonar.properties

For the sonar.properties file, please see below or link

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Problem

When we introduced Gocv to build my project for code coverage, I encountered the following error message:

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Backgorud

1. When you want to add build status to your Bitbucket the specific commit of a branch when you start a build from the branch

2. When the build status is wrong, you want to update it manually. for example, update build status from FAILED to SUCCESSFUL

You can call Bitbucket REST API to do these.

Code snippet

Below is the code snippet to update Bitbucket build status with REST API in the shell script.

The code on GitHub Gist: https://gist.github.com/shenxianpeng/bd5eddc5fb39e54110afb8e2e7a6c4fb

Click Read More to view the code here.

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本篇简要介绍：什么是代码覆盖率？为什么要做代码覆盖率？代码覆盖率的指标、工作原理，主流的代码覆盖率工具以及不要高估代码覆盖率指标。

什么是代码覆盖率？

代码覆盖率是对整个测试过程中被执行的代码的衡量，它能测量源代码中的哪些语句在测试中被执行，哪些语句尚未被执行。

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This article shares how to use Gcov and LCOV to metrics code coverage for C/C++ projects.
If you want to know how Gcov works, or you need to metrics code coverage for C/C++ projects later,
I hope this article is useful to you.

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I’ve run into some situations when the build fails, perhaps because some processes don’t finish, and even setting a timeout doesn’t make the Jenkins job fail.

So, to fix this problem, I used try .. catch and error to make my Jenkins job failed, hopes this also helps you.

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前言

本篇记录两个在做 Jenkins 与 AIX 做持续集成得时候遇到的 Git clone 代码失败的问题，并已解决，分享出来或许能有所帮助。

1. Dependent module /usr/lib/libldap.a(libldap-2.4.so.2) could not be loaded.
2. 通过 SSH 进行 git clone 出现 Authentication failed

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最近使用 AIX 7.1 从 Bitbucket 下载代码的时候遇到了这个错误：

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最近在我使用 Artifactory Enterprise 遇到了上传制品非常缓慢的问题，在经过与 IT，Artifactory 管理员一起合作终于解决这个问题，在此分享一下这个问题的解决过程。

如果你也遇到类似或许有所帮助。

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I’m just documenting to myself that it was solved by following.

When I want to integrate the ESlint report with Jenkins. I encourage a problem

That is eslint-report.html display different with it on my local machine, and I also log to Jenkins server and grab the eslint-report.html to local, it works well.

I used HTML Publisher plugin to display the HTML report, but only the ESlint HTML report has problems other report work well, so I guess this problem may be caused by Jenkins.

Finally, I find it. (Stackoverflow URL)

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在使用 Git 提交代码之前，建议做以下这些设置。

叫指南有点夸张，因为它在有些情况下下不适用，比如你已经有了 .gitattributes 或 .editorconfig 等文件，那么有些设置就不用做了。

因此暂且叫他指北吧，它通常情况下还是很有用的。

废话不多说，看看都需要哪些设置吧。

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Why need branching naming convention

To better manage the branches on Git(I sued Bitbucket), integration with CI tool, Artifactory, and automation will be more simple and clear.

For example, good unified partition naming can help the team easily find and integrate without special processing. Therefore, you should unify the partition naming rules for all repositories.

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Problem

When you do CI with JFrog Artifactory when you want to download the entire folder artifacts, but maybe your IT doesn’t enable this function, whatever some seasons.

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What’s the problem?

Today I am having a problem where the Windows installer I created is not installing, and the following Windows installer box pops up.

But it works well in the previous build, and I didn’t make any code changes. It is strange, actually fix this problem is very easy but not easy to find.

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