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feat: PSJekyll Container.start.ps1 ( Fixes #13 )
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James Brundage
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Oct 1, 2024
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<# | ||
.SYNOPSIS | ||
Starts the container. | ||
.DESCRIPTION | ||
Starts a container. | ||
This script should be called from the Dockerfile as the ENTRYPOINT (or from within the ENTRYPOINT). | ||
It should be deployed to the root of the container image. | ||
~~~Dockerfile | ||
# Thank you Microsoft! Thank you PowerShell! Thank you Docker! | ||
FROM mcr.microsoft.com/powershell | ||
# Set the shell to PowerShell (thanks again, Docker!) | ||
SHELL ["/bin/pwsh", "-nologo", "-command"] | ||
# Run the initialization script. This will do all remaining initialization in a single layer. | ||
RUN --mount=type=bind,src=./,target=/Initialize ./Initialize/Container.init.ps1 | ||
ENTRYPOINT ["pwsh", "-nologo", "-file", "/Container.start.ps1"] | ||
~~~ | ||
.NOTES | ||
Did you know that in PowerShell you can 'use' namespaces that do not really exist? | ||
This seems like a nice way to describe a relationship to a container image. | ||
That is why this file is using the namespace 'mcr.microsoft.com/powershell'. | ||
(this does nothing, but most likely will be used in the future) | ||
#> | ||
using namespace 'ghcr.io/powershellweb/psjekyll' | ||
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param() | ||
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$env:IN_CONTAINER = $true | ||
$PSStyle.OutputRendering = 'Ansi' | ||
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$mountedDrives = @(if (Test-Path '/proc/mounts') { | ||
(Select-String "\S+\s(?<p>\S+).+rw?,.+symlinkroot=/mnt/host" "/proc/mounts").Matches.Groups | | ||
Where-Object Name -eq p | | ||
Get-Item -path { $_.Value } | | ||
New-PSDrive -Name { "Mount", $_.Name -join '.' } -PSProvider FileSystem -Root { $_.Value } -Scope Global -ErrorAction Ignore | ||
}) | ||
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if ($global:ContainerInfo.MountedPaths) { | ||
"Mounted $($mountedPaths.Length) drives:" | Out-Host | ||
$mountedDrives | Out-Host | ||
} | ||
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if ($args) { | ||
# If there are arguments, output them (you could handle them in a more complex way). | ||
"$args" | Out-Host | ||
} else { | ||
# If there are no arguments, see if there is a Microservice.ps1 | ||
if (Test-Path './Microservice.ps1') { | ||
# If there is a Microservice.ps1, run it. | ||
. ./Microservice.ps1 | ||
} | ||
#region Custom | ||
else | ||
{ | ||
<#Start-ThreadJob -Name "${env:ModuleName}.Jekyll" -ScriptBlock { | ||
jekyll serve --host "$( | ||
if ($env:JEKYLL_HOST) { $env:JEKYLL_HOST } | ||
else { '*' } | ||
)" '--port' $( | ||
if ($env:JEKYLL_PORT) { $env:JEKYLL_PORT } | ||
else { 4000 } | ||
) | ||
}#> | ||
} | ||
#endregion Custom | ||
} | ||
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# If you want to do something when the container is stopped, you can register an event. | ||
# This can call a script that does some cleanup, or sends a message as the service is exiting. | ||
Register-EngineEvent -SourceIdentifier PowerShell.Exiting -Action { | ||
if (Test-Path '/Container.stop.ps1') { | ||
& /Container.stop.ps1 | ||
} | ||
} | Out-Null |