I have a directory with 10 git repos.
I would like to do git pull on all of them, in parallel, in a single command:
gpa // git-pull-all
This should actually do the following:
cd c:\repos;
foreach $dir in `ls -d` do
git pull & // unix version for background
cd ..
end
This should be quite simple in bash (unix). In powershell I find it very complicated.
How can I do it properly?
This would not be an alias (in PowerShell parlance), it would just be a function or a script.
Mostly you would just find the relevant analogues in PowerShell.
So ls in PowerShell is actually an alias for Get-ChildItem, which in PowerShell v3+ also supports a -Directory parameter to return only directories, so that part almost works right away.
Although you can do a foreach($thing in $things) loop, in this case it would be a bit more natural (PowerShell-ey) to pipe into ForEach-Object, so something like this:
$repos = 'C:\repos'
Get-ChildItem -Path $repos -Directory | ForEach-Object -Process {
Push-Location -Path $_
git pull
Pop-Location
}
For reference, using aliases and alternate syntax to make it look the most like your original, it could be done like this:
cd c:\repos
foreach ($dir in (ls -di)) {
git pull
cd ..
}
However I recommend the first one because:
Neither of these examples handle the backgrounding of the task though. I left that out for the time being because it's not as analogous.
To do that you can use PowerShell Jobs. Either with Start-Job or with Invoke-Command -AsJob.
Have a look at how to use jobs and decide if you want to spend the time to apply it for just 10 repos though.
PS C:\> help about_Jobs