Set plink username per-host from git?

Question

I have the following Git configuration file (I'm using plink because this host is configured with a TPMVSC-backed SSH key):

# This is Git's per-user configuration file.
[user]
    name = James Edington
    email = [email protected]

[core]
    sshCommand = plink -batch

[ssh]
    variant = plink

[credential "ssh://git-codecommit.us-east-1.amazonaws.com"]
    username = ABCDEFGHIJKLMNOPQRST

However, Git doesn't actually seem to be passing this username to plink.

There are a few workarounds I've found, such as:

• Baking my username into the repository URL: git clone ssh://ABCDEFGHIJKLMNOPQRST@git-codecommit…
• Baking my username into the SSH command: (export GIT_SSH_COMMAND="plink -batch -l ABCDEFG…"; git clone ssh://git-codecommit.us…/project && cd project && git config --local core.sshCommand "$GIT_SSH_COMMAND")

But I'm wondering what the proper solution is.

I have tried setting ssh.variant to plink, auto, and ssh; none of these works. Passing GIT_TRACE=1 reveals that Git isn't passing a username parameter on the command-line to plink in any case.

I have also tried adding an appropriate entry to %USERPROFILE%\.ssh\config, but plink does not seem to load this file.

It seems like Git's not picking up the per-host credential directive, but according to the documentation, I think it should match as I've written it:

both protocols are the same, both hosts are the same, and the "pattern" URL does not care about the path component at all.

---

Is Git truly bugged not to actually support per-host usernames with plink at this time? Or am I doing something wrong?

Question asked in the context of Git 2.38.1.windows.1; PuTTY-CAC Plink Release 0.77; Windows 10.0.19044; Amazon CodeCommit server.

Answer 1

1. You can transfer nothing from Git to Plink
2. You have to define connection-credential for plink in two (at least) ways

• Putty session
• user in plink options

Both variants will require changing core.sshCommand also