Private/Get-ALFileDiff.ps1
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function Get-ALFileDiff { <# .SYNOPSIS Get unified diff for an AL file using native git .DESCRIPTION Extracts the unified diff for a specific AL file, showing what changed. Handles both modified files and new files appropriately. .PARAMETER FilePath Path to the AL file (relative to repo root) .PARAMETER BaseBranch Base branch for comparison (default: origin/master) .PARAMETER ContextLines Number of context lines around changes (default: 10) .EXAMPLE Get-ALFileDiff -FilePath "src/MyTable.al" .OUTPUTS System.Object - Hashtable with FilePath, FullDiff, DiffSize, Chunks .NOTES Author: waldo Version: 1.0.0 #> [CmdletBinding()] param( [Parameter(Mandatory = $true)] [string]$FilePath, [Parameter(Mandatory = $false)] [string]$BaseBranch = "origin/master", [Parameter(Mandatory = $false)] [int]$ContextLines = 10 ) begin { Write-Verbose "Starting $($MyInvocation.MyCommand.Name)" } process { try { Write-Verbose "Getting diff for $FilePath" if (-not (Test-Path $FilePath)) { Write-Warning "File not found: $FilePath" return $null } # Use the same compare ref as Get-ChangedALFiles $compareRef = "HEAD" if ($env:BUILD_SOURCEVERSION -and $env:BUILD_SOURCEVERSION -ne '') { $compareRef = $env:BUILD_SOURCEVERSION } # Check if this is a new file (added in this branch) $fileStatus = git diff --name-status "$BaseBranch..$compareRef" -- $FilePath $isNewFile = $fileStatus -match '^A\s' if ($isNewFile) { Write-Verbose "New file detected - showing full content" # For new files, show the entire file content as the diff $diffOutput = git show "${compareRef}:${FilePath}" # Wrap in diff-like format for consistency $diffOutput = "--- /dev/null`n+++ b/$FilePath`n" + ($diffOutput -split "`n" | ForEach-Object { "+$_" } | Join-String -Separator "`n") } else { # Get unified diff with context lines $diffOutput = git diff "$BaseBranch..$compareRef" "-U$ContextLines" -- $FilePath } if ([string]::IsNullOrWhiteSpace($diffOutput)) { Write-Verbose "No changes in $FilePath" return $null } Write-Verbose "Diff size: $($diffOutput.Length) characters" return @{ FilePath = $FilePath FullDiff = $diffOutput DiffSize = $diffOutput.Length # Phase 1: Single diff unit Chunks = @(@{ Content = $diffOutput IsFullDiff = $true }) } } catch { Write-Error "Error in $($MyInvocation.MyCommand.Name): $_" throw } } end { Write-Verbose "Completed $($MyInvocation.MyCommand.Name)" } } |