Please suggest how can i convert below PowerShell script to bash script

Question

$releaseBody = @{
ChannelId = $channel.Id
ProjectId = $project.Id
Version = $releaseVersion
SelectedPackages = @()
}

$template = Invoke-RestMethod -Uri "$octopusURL/api/$($space.id)/deploymentprocesses/deploymentprocess-$($project.id)/template?channel=$($channel.Id)" -Headers $header

$template.Packages | ForEach-Object {
$uri = "$octopusURL/api/$($space.id)/feeds/$($.FeedId)/packages/versions?packageId=$($.PackageId)&take=1"
$version = Invoke-RestMethod -Uri $uri -Method GET -Headers $header
$version = $version.Items[0].Version

$releaseBody.SelectedPackages += @{  
    ActionName           = $_.ActionName  
    PackageReferenceName = $_.PackageReferenceName  
    Version              = $version  
}  

}

Answer 1

Hi SantoshShet-8694,

There is no Automated tools or options to convert any PowerShell script to bash script and if you do it manually there are chances of having limited functionality or compatibility but you can make your PowerShell scripts run directly from Bash without the need of running PowerShell first.

Let's consider your script is saved as new.ps1

$releaseBody = @{
ChannelId = $channel. Id
ProjectId = $project. Id
Version = $releaseVersion
SelectedPackages = @()
}

$template = Invoke-RestMethod -Uri "$octopusURL/api/$($space. id)/deploymentprocesses/deploymentprocess-$($project. id)/template?channel=$($channel. Id)" -Headers $header

$template.Packages | ForEach-Object {
$uri = "$octopusURL/api/$($space. id)/feeds/$($.FeedId)/packages/versions?packageId=$($.PackageId)&take=1"
$version = Invoke-RestMethod -Uri $uri -Method GET -Headers $header
$version = $version.Items[0].Version

$releaseBody.SelectedPackages += @{
ActionName = $.ActionName
PackageReferenceName = $.PackageReferenceName
Version = $version
}
}

To call this script you will need to do the following in PowerShell.

$ .\new.ps1 "My Script"

This will create a markdown file in the current directory with the title passed in and the contents from the script.

Now, To execute the PowerShell script directly from Bash on Linux. If you put a shebang at the start of the script and the path to the interpreter you want to use.

Type the following command in Bash to determine the location of the PowerShell executable on your system.

$ which pwsh
/usr/bin/pwsh

Now that we know the location, let’s edit the new.ps1 script to add shebang.

! /usr/bin/pwsh

$releaseBody = @{
ChannelId = $channel. Id
ProjectId = $project. Id
Version = $releaseVersion
SelectedPackages = @()
}

$template = Invoke-RestMethod -Uri "$octopusURL/api/$($space. id)/deploymentprocesses/deploymentprocess-$($project. id)/template?channel=$($channel. Id)" -Headers $header

$template.Packages | ForEach-Object {
$uri = "$octopusURL/api/$($space. id)/feeds/$($.FeedId)/packages/versions?packageId=$($.PackageId)&take=1"
$version = Invoke-RestMethod -Uri $uri -Method GET -Headers $header
$version = $version.Items[0].Version

$releaseBody.SelectedPackages += @{
ActionName = $.ActionName
PackageReferenceName = $.PackageReferenceName
Version = $version
}
}

With that line added the final step is to make it executable.

$ chmod +x new.ps1

Now you can run our PowerShell script from Bash and the shebang will make sure the script is ran using PowerShell.

$ ./new.ps1 "My Script"

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