Powershell issue - executing command in Git Bash

Question

I'm trying to write a script that's part of a much bigger automation script that configures the GitHub ssh key on a local dev machine.

This is the line I'm trying to run but for some reason the 'eval $(ssh-agent -s)' fails as it errors and outputs this message.

'eval' is not recognized as an internal or external command,
operable program or batch file.

cmd.exe /c "ssh-keygen -t rsa -b 4096 -C "$githubEmailAddress" && eval $(ssh-agent -s) && ssh-add ~/.ssh/id_rsa && clip < ~/.ssh/id_rsa.pub"

I have looked around and I'm having no luck getting past this issue. I can't work out how to launch the Git Bash terminal where the command works from the ps1 script.

R.Laney · Accepted Answer · 2020-07-18 16:59:47Z

You should consider creating an alias for bash.exe that way it is only referenced one time in the script and will be easier to change if you need to in the future.

You can then create the SSH key as shown:

New-Alias -Name gitBash -Value "$Env:ProgramFiles\Git\bin\bash.exe

gitBash -c "ssh-keygen -t rsa -b 4096 -C "[email protected]" && eval $(ssh-agent -s) && ssh-add ~/.ssh/id_rsa && clip < ~/.ssh/id_rsa.pub && exit"

You also won't have to do as much encoding as the key gen parameters won't need to be wrapped in a string delimiter anymore.

You also avoid managing the current directory manually like you are with the cd command.

Also note the use of the $Env:ProgramFiles to get the base path of the program files directory, its not common for it to be configured differently than "C:\Program Files" but it can be and it avoids issues with spaces in the path name this way.

Chris Marshall · Accepted Answer · 2020-07-18 03:37:09Z

0

After a lot of trial and error the way you can open a git bash prompt from powershell is to find the bin\bash.exe file normally found in a folder called Git within the Program Files folder.

From the location of the ps1 file you might need to modify the ....\ part but the script below allow you to open a bash prompt execture a bunch of calls and then exit the prompt

cmd.exe /c 'cd "..\..\Program Files\Git\bin" && bash.exe -c "ssh-keygen -t rsa -b 4096 -C "[email protected]" && eval $(ssh-agent -s) && ssh-add ~/.ssh/id_rsa && clip < ~/.ssh/id_rsa.pub && exit"'

answered Jul 18, 2020 at 3:37

Chris Marshall

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