Category Archives: Development Tools

How much time do you spend coding ?

Time tracking is a pain when you have to do it for your boss, but it’s incredibly useful when you do it for you own projects, to find out what parts takes most of your time, how much time did you dedicate to this side project, etc.

For years I’ve been using Rescue time, I recently switched to, which is more programmer oriented. Its integration with VS Code (and most of the majors and not so majors IDEs) is great, and the reports really detailed.

Exporting GIT history to a CSV/Excel file

There are many tools to compute stats from your GIT repositories, but sometimes, you may just want to export it to Excel and make your own quick and direty stats.

the git log command, with pretty print, is your friend. For example, the following command will display the commit date, hash, commiter name and email, and the commit message :

git log --pretty=format:%cI,%h,%an,%ae,%s > commits.csv

The pretty format documentation is available here :

How to digitally sign your outgoing emails with Outlook ?

Would you like to prove to your contacts the authenticity of your emails ? A S/MIME signature of your messages may be a solution. It will guarantee that a message comes from you, and that its content wasn’t altered. You can do it for free – as long as it’s for a personnal use – using a Comodo free email certificate. The solution may be seducing, but there are two caveats.

First, the validation of your signature is done by your recipient email client, and most email clients just don’t support it. As a rule of thumb, consider only the outlook desktop app supports it (gmail,, default android client don’t support it, iphone can support it but it’s disabled by default). And there’s nothing you can do about it.

Second, the procedure to sign your messages may give some headaches, and it’ll be different for each email client. But at least, here is a step by step guide to digitally sign outgoing messages on Outlook.

  1. Get a mail Certificate
  2. Install your mail certificate in your local certificate store
  3. Check that your certificate is properly installed
  4. Configure Outlook to sign outgoing messages

1. Get a mail certificate

If you don’t already own a mail certificate, you can get a free one from Comodo here, or directly here.
Continue reading

Solving Eclipse/maven error : dependency/ a.b.c (managed from x.y.z)

If Eclipse/M2E reports a maven dependency version conflict, with message “managed from x.y.z” (ex : “jooq/ 3.7.1 (managed from 3.6.0)“), the conflicting dependency is defined by an ancestor of the current maven project (could be its parent, great-parent, great-great-parent, etc.).

For example, let’s say maven signals a dependency conflict for a spring-boot 1.3 application. Version 3.7.1 of the JOOQ library is used while you specified version 3.6.0 (which is a pain because JAVA 7 is targeted, while JOOQ 3.7.1 only supports JAVA 8).

The error returned by the SpringBoot application is :
java.lang.UnsupportedClassVersionError: org/jooq/SQLDialect :
Unsupported major.minor version 52.0

JOOQ is used by a dependency of the spring-boot application. The main application itself has no reference to JOOQ.

Indeed :

  1. project A declares a maven dependency on JOOQ 3.6.0 :
    [code lang=xml]


  2. project B declares a maven dependency on project A, and defines spring-boot-starter-parent as a parent
    In project B dependencies, Eclipse/M2E flags JOOQ as “version 3.7.1 (managed from 3.6.0)” while version 3.6.0 is expected.
  3. spring-boot-starter-parent has spring-boot-dependencies as a parent, which itself manages dependencies for JOOQ
    [code lang=xml]



To fix it, you could add a jooq 3.6.0 dependency to project B, so that the maven dependency conflict solving strategy uses this version since it is the nearest dependency. But that would be ugly. A cleaner solution consists in overriding the jooq.version property defined in spring-boot-starter-parent, as documented here :
[code lang=xml] 3.6.0 [/code]