Commands/Invoke-SqlSeed.ps1
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<# Copyright 2021 Jeffrey Sharp Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. #> using namespace PSql.Deploy.Seeding function Invoke-SqlSeed { <# .SYNOPSIS Applies seeds to target databases. .DESCRIPTION This cmdlet expects a filesystem layout like the following: Database\ The "source directory": a set of migrations and | seeds for one database. The name can vary. | > Migrations\ Migrations for the database. | > Seeds\ Seeds for the the database. | | | > Foo\ One seed. The name can vary. | > _Main.sql Top-level file for the seed. It can include | | other files with the :r directive. | | _Pre.ps1 PowerShell script that runs before _Main.sql. | | _Post.ps1 PowerShell script that runs after _Main.sql. | > FileA.sql Example file included by _Main.sql. | > FileB.sql Example file included by _Main.sql. | > ...\ Other directories as desired. Each subdirectory of $SourcePath\Seeds containing a _Main.sql file is presumed to be a seed. The name of the subdirectory is the name of the seed. The search is not recursive; only one level of subdirectories is examined. #> [CmdletBinding()] param ( # Names of the seeds to run. [Parameter(Mandatory, Position=0)] [string[]] $Seed, # Objects specifying how to connect to target databases. Obtain via the New-SqlContext cmdlet. [Parameter(Mandatory, Position=1, ValueFromPipeline)] [PSql.SqlContext[]] $Target, # Path to a directory containing database source code. The default is the current directory. [Parameter()] [string] $SourcePath = ".", # Name/value pairs to define as SqlCmd variables. [Parameter()] [hashtable] $Define = @{}, # Number of databases to seed simultaneously. [Parameter()] [ValidateRange(1, [int]::MaxValue)] [int] $DatabaseParallelism, # Number of commands to perform simultaneously against a particular database. [Parameter()] [ValidateRange(1, [int]::MaxValue)] [int] $CommandParallelism ) begin { # The core script that each parallel worker runs # NOTE: Use $Seed to access the seed context $WorkerScript = { $ErrorActionPreference = "Stop" Set-StrictMode -Version 3.0 Import-Module PSql $Target = [PSql.SqlContext] $Seed.Data['Target'] $Connection = Connect-Sql -Context $Target try { Invoke-Sql -Connection $Connection " DECLARE @id uniqueidentifier = '$($Seed.RunId)'; SET CONTEXT_INFO @id; " while ($Module = $Seed.GetNextModule()) { Invoke-Sql $Module.Batches -Connection $Connection } } finally { Disconnect-Sql $Connection } } # Create factory to build each seed plan $PlanFactory = [SeedPlanFactory]::new($WorkerScript, $Host) } process { # Get seed _Main.sql files $SeedMains = $Seed | ForEach-Object { Join-Path $SourcePath Seeds $_ _Main.sql } | Get-Item # Assert _Main.sql files are readable $SeedMains | Get-Content -Head 1 > $null # Translate -DatabaseParallelism argument $Limit = $DatabaseParallelism ? @{ ThrottleLimit = $DatabaseParallelism } : @{} # Show banner $PreviousColor = $Host.UI.RawUI.ForegroundColor try { $Host.UI.RawUI.ForegroundColor = "Cyan" Write-Host "--------------------------------------------------------------------------------" Write-Host "Seed " -NoNewline Write-Host ($Seed -join " + ") -NoNewline -ForegroundColor Yellow Write-Host " for " -NoNewline Write-Host $Target.Length -NoNewline -ForegroundColor Yellow Write-Host " target" ($Target.Length -eq 1 ? "database" : "databases") Write-Host "--------------------------------------------------------------------------------" } finally { $Host.UI.RawUI.ForegroundColor = $PreviousColor } # List targets $Target | Format-Table ` @{ Label = "Target Server"; Expression = { $_.GetEffectiveServerName() } }, @{ Label = "Target Database"; Expression = { $_.DatabaseName ?? "(default)" } } # Run seeds against each target in parallel $Target | ForEach-Object @Limit -Parallel { $ErrorActionPreference = "Stop" Set-StrictMode -Version 3.0 Import-Module PSql, PSql.Deploy $Target = $_ $DatabaseName = $_.DatabaseName ?? "(default)" $SeedMains = $using:SeedMains $DefineSource = $using:Define $Parallelism = $using:CommandParallelism $PlanFactory = $using:PlanFactory # Run each seed in sequence foreach ($SeedMain in $SeedMains) { $SeedName = $SeedMain.Directory.Name $SeedPath = $SeedMain.Directory.FullName $Define = $DefineSource.Clone() # to prevent modifications from leaking $ScriptArgs = @{ Target = $Target; SeedPath = $SeedPath; Define = $Define } # NOTE: in v1, Seed = $SeedName # Execute pre-seed script $ScriptPath = Join-Path $SeedPath _Pre.ps1 if (Test-Path $ScriptPath) { Write-Host "Running _Pre.ps1" & $ScriptPath @ScriptArgs } # Execute seed $Plan = $PlanFactory.Create() try { # Flow objects to seed plan $Plan.AddContextData('Name', "$SeedName->$DatabaseName") $Plan.AddContextData('Source', $SeedPath) $Plan.AddContextData('Target', $_) # Populate the seed plan with modules $SeedMain ` | Get-Content -Raw ` | Expand-SqlCmdDirectives -Define $Define ` | ForEach-Object { $Plan.AddModules($_) } # Validate the seed plan if (($Errors = $Plan.Validate()).Count) { $Errors.GetEnumerator() throw "Invalid" } # Run the seed plan $Plan.Run($Parallelism) } finally { $Plan.Dispose() } # Execute post-seed script $ScriptPath = Join-Path $SeedPath _Post.ps1 if (Test-Path $ScriptPath) { Write-Host "Running _Post.ps1" & $ScriptPath @ScriptArgs } } } } } |