There is a time in your project when you start using Gerrit code review system. When you have maven release plugin to make release, you can be very surprised when you see:

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[ERROR] The git-push command failed.  
[ERROR] Command output:  
[ERROR] Permission denied (publickey).

This is a situation when we use ssh connections to gerrit. But, when you try to push something to master (ignoring code review), it works! How is that possible?

You probably have in your gitconfig an ssh URL with your user name. But in your project SCM (in pom.xml) you do not have your user name. What user name maven release plugin use? Your computer account name, which is in most cases different than your Gerrit user name.

How to repair it? Define a file in .ssh/config directory with content:

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Host gerrit  
    HostName YOUR_GERRIT_HOST  
    Port YOUR_GERRIT_PORT  
    User YOUR_GERRIT_USER_NAME

There may be a lot of other reason why you have Premission denied, but this was the hardest I’ve ever seen.

Exploring git ls-files

This post describes, my experiments with git ls-files command.

In repository, we have files:

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.DS_Store (Mac OS X, folder settings file)
.git (Git repository file)
.gitignore (Git ignore file)
ignoredFile (Some file, that should be ignored)
inRepo (File in repository)
untracked (Som untracked file)
staged (Staged file)

This command show us, all committed files and staged files.

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$ git ls-files
.gitignore
inRepo
staged

This command show us, all files that are ignored or untracked. Those files are called ‘other’.

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$ git ls-files --others
.DS_Store
ignoredFile
untracked

This command show us, all others files, without ignored files. Option exclude-standard means that standard git exclusion files are included.

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$ git ls-files --others --exclude-standard
untracked

This command show us, all files that are ignored.

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$ git ls-files --ignored --others --exclude-standard
.DS_Store
ignoredFile

In my global git ignore file, there is a rule to ignore all .DS_Store files. In my local git ignore file, there is a rule to ignore ignoredFile file.