How to override git log --format=oneline actual format?

Question

I have hard issue to rule out (which I do not want to bother you). To rule that issue out, I have found that on my failing system the command

$ git log --pretty=oneline

is equivalent to:

$ git log --pretty=format:%H%x20%s

This makes the long hash output. At the same time

$ git log --oneline

makes short hash output. Which is the desired output.

On the not failing system the --pretty=oneline format is equivalent to:

$ git log --pretty=format:%h%x20%s

This makes short hash output.

I have been looking how to override the oneline configuration in git and it seems that the oneline is hard coded, i.e. I can not change the format with:

$ git config --global pretty.oneline %h%x20%s

I can make different pretty format

$ git config --global pretty.myline %h%x20%s

and it will show nicely the short hash with

$ git log --pretty=myline

The trouble is that I want to rule out the issue dependence to exact log command hash printout length. I can not use different command like

$ git log --pretty=format:%h%x20%s

Is there a way to override the pretty formats like oneline?

Answer 1

Your overall analysis is correct, I get what you'd want to achieve, but built-in pretty formats are unfortunately fixed.

From the doc :

Note that an alias with the same name as a built-in format will be silently ignored.

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However, the difference between these two git environments might be leveled in some other way. Maybe consider getting both installations to the same git version?