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Enable Vertical build PoC as a more first-class concept (#14274)
Co-authored-by: Viktor Hofer <viktor.hofer@microsoft.com>
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src/Microsoft.DotNet.Arcade.Sdk/tools/SourceBuild/git-clone-to-dir.ps1
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| <# | ||
| .SYNOPSIS | ||
| Creates a git clone of <source> into <dest> directory, optionally saving WIP changes. | ||
| .PARAMETER Source | ||
| The source Git directory | ||
| .PARAMETER Dest | ||
| The destination Git directory. Created if doesn't exist. | ||
| .PARAMETER Clean | ||
| If dest directory already exists, delete it. | ||
| .PARAMETER CopyWip | ||
| Transfer most types of uncommitted change into the destination directory. Useful for dev workflows. | ||
| #> | ||
|
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||
| param ( | ||
| [Parameter(Mandatory=$true)] | ||
| [string]$Source, | ||
| [Parameter(Mandatory=$true)] | ||
| [string]$Dest, | ||
| [switch]$Clean, | ||
| [switch]$CopyWip | ||
| ) | ||
|
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| if (-not (Test-Path $Source -PathType Container)) { | ||
| Write-Host "-Source not a directory: $Source" | ||
| exit 1 | ||
| } | ||
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| Write-Host "Cloning repository at: $Source -> $Dest ..." | ||
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| if (Test-Path $Dest) { | ||
| Write-Host "Destination already exists!" | ||
| if (Test-Path $Dest -PathType Leaf) { | ||
| Write-Host "Existing destination is a regular file, not a directory. This is unusual: aborting." | ||
| exit 1 | ||
| } | ||
| elseif ($Clean) { | ||
| Write-Host "Clean is enabled: removing $dest and continuing..." | ||
| Remove-Item -Path $Dest -Recurse -Force | ||
| } | ||
| else { | ||
| Write-Host "Clean is not enabled: aborting." | ||
| exit 1 | ||
| } | ||
| } | ||
|
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| Push-Location -Path $Source | ||
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| if (-not (Test-Path $Dest)) { | ||
| New-Item -Path $Dest -ItemType Directory | Out-Null | ||
|
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| if ($CopyWip) { | ||
| # Copy over changes that haven't been committed, for dev inner loop. | ||
| # This gets changes (whether staged or not) but misses untracked files. | ||
| $stashCommit = (git stash create) | ||
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| if ($stashCommit) { | ||
| Write-Host "WIP changes detected: created temporary stash $stashCommit to transfer to inner repository..." | ||
| } | ||
| else { | ||
| Write-Host "No WIP changes detected..." | ||
| } | ||
| } | ||
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| Write-Host "Creating empty clone at: $Dest" | ||
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| # Combine the results of git rev-parse --git-dir with the "shallow" subdirectory | ||
| # to get the full path to the shallow file. | ||
|
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| $shallowFile = Join-Path (git rev-parse --git-dir) "shallow" | ||
|
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| if (Test-Path $shallowFile) { | ||
| Write-Host "Source repository is shallow..." | ||
| if ($stashCommit) { | ||
| Write-Host "WIP stash is not supported in a shallow repository: aborting." | ||
| exit 1 | ||
| } | ||
|
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| # If source repo is shallow, old versions of Git refuse to clone it to another directory. First, | ||
| # remove the 'shallow' file to trick Git into allowing the clone. | ||
| $shallowContent = Get-Content -Path $shallowFile | ||
| Remove-Item -Path $shallowFile | ||
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| # Then, run the clone: | ||
| # * 'depth=1' avoids encountering the leaf commit in the shallow repo that points to a parent | ||
| # that doesn't exist. (The commit marked "grafted".) Git would fail here, otherwise. | ||
| # * '--no-local' allows a shallow clone from a git dir on the same filesystem. This means the | ||
| # clone will not use hard links and takes up more space. However, since we're doing a shallow | ||
| # clone anyway, the difference is probably not significant. (This has not been measured.) | ||
| # * '-c protocol.file.allow=alwyas allows cloning from the local filesystem even on newer versions | ||
| # of git which have disabled this for security reasons. | ||
| git clone -c protocol.file.allow=always --depth=1 --no-local --no-checkout "$Source" "$Dest" | ||
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| # Restore the 'shallow' file | ||
| Set-Content -Path $shallowFile -Value $shallowContent | ||
| } else { | ||
| git clone -c protocol.file.allow=always --no-checkout "$Source" "$Dest" | ||
| } | ||
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| echo "Checking out sources..." | ||
| # If no changes were stashed, stashCommit is empty string, and this is a simple checkout. | ||
| git -C $Dest checkout $stashCommit | ||
| echo "Clone complete: $Source -> $Dest" | ||
|
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| } | ||
|
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| Pop-Location |
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