Git-NumberedAdd

1.1

lib/Parse-GitStatus.ps1

##############################################################################
#.SYNOPSIS
# Invokes `git status -s` and parses the result into object/array of objects
# Called by Git-NumberedStatus
#
#.DESCRIPTION
# Output looks like:
#
# @{
# state=M(odified), A(dded), R(enamed)
# file=The filename as ouputted by git status
# staged=$true for staging area, $false for working directory change
# fullPath=The full path
# relativePath=Relative path to current pwd
# oldFile=The original filename in case of a staged rename
# }
##############################################################################
function Parse-GitStatus($includeNumstat = $false, $extraArgs) {
    $hasStaged = $false
    $hasWorkingDir = $false

    $workingDir = Get-Location
    $gitRootdir = Get-GitRootLocation
    # write-host "workingDir=$workingDir"
    # write-host "gitRootdir=$gitRootdir"

    # ATTN: git status --porcelain returns paths relative from the repository root folder
    # git status -s *could* change in the future but returns paths relative to pwd.
    $allFiles = Invoke-Git status -s $extraArgs | % {
        $relativePath = $_.Substring(3).Replace("`"", "")

        if ($relativePath -match " -> ") {
            $oldFilename = $relativePath.Substring(0, $relativePath.IndexOf(" -> "))
            $relativePath = $relativePath.Substring($relativePath.IndexOf(" -> ") + 4)
        }
        # write-host "relativePath: $relativePath"
        $fullPath = Join-Path $workingDir $relativePath
        # write-host "fullPath: $fullPath"
        $fullPath = $ExecutionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath($fullPath)
        # write-host "fullPath2: $fullPath"
        $gitRootPath = $fullPath.Substring($gitRootdir.ToString().Length + 1)

        $relativePath = Quote-Path $relativePath
        $fullPath = Quote-Path $fullPath
        $gitRootPath = Quote-Path $gitRootPath

        # write-host "RELATIVE=$relativePath FULL=$fullPath GIT_ROOT=$gitRootPath"
        $returns = @()

        $staged = $_[0] -ne " " -and $_[0] -ne "?"
        if ($staged) {
            $hasStaged = $true
            $returns += @{state=$_[0];file=$gitRootPath;staged=$true;fullPath=$fullPath;relativePath=$relativePath;oldFile=$oldFilename}
        }

        $isWorkingDir = $_[1] -ne " "
        if ($isWorkingDir) {
            $hasWorkingDir = $true
            $state = If ($_[1] -eq "?") {"A"} Else {$_[1]}
            $returns += @{state=$state;file=$gitRootPath;staged=$false;fullPath=$fullPath;relativePath=$relativePath}
        }
        return $returns

    } | % {$_}



    # Include +/- lines for all files
    if ($includeNumstat) {
        if ($hasWorkingDir) {
            Add-GitNumstat $allFiles $false
        }

        if ($hasStaged) {
            Add-GitNumstat $allFiles $true
        }
    }

    return $allFiles
}


function Quote-Path($path) {
    if ($path.Contains(" ")) {
        return "`"$path`""
    }
    return $path
}


function Add-GitNumstat($allFiles, $staged) {
    if ($staged) {
        $numstatResult = Invoke-Git diff --numstat --cached 2>&1
    } else {
        $numstatResult = Invoke-Git diff --numstat 2>&1
    }


    $eolWarnings = $numstatResult | ? { $_ -is [System.Management.Automation.ErrorRecord] }
    $eolWarnings | % {
        $line = $_.Exception.Message
        if ($line.StartsWith('The file will have its original line')) {
            # Ignore this one

        } elseif ($line.StartsWith('warning: ')) {
            # Add EOL notice
            $match = $line | Select-String -Pattern 'warning: (\w+) will be replaced by (\w+) in (.*)\.'
            $fromEol = $match.matches.groups[1]
            $toEol = $match.matches.groups[2]
            $fileName = $match.matches.groups[3].Value.Replace('/', '\')
            $matchingStatus = $allFiles | Where {$_.file -eq $fileName}
            if ($matchingStatus) {
                $matchingStatus.lineEndings = "$fromEol -> $toEol"
            }
        }
    }


    $numstatResult = $numstatResult | ? { $_ -isnot [System.Management.Automation.ErrorRecord] }
    $numstatResult | % {
        # Output format: +++ `t --- `t fileName
        $numstat = $_.Trim().Split("`t")
        $file = Quote-Path $numstat[2]
        $numstat = @{file=$file;added=$numstat[0];deleted=$numstat[1]}
        $matchingStatus = $allFiles | Where {$_.staged -eq $staged -and $numstat.file -eq $_.file}

        if ($matchingStatus) {
            $matchingStatus.added = $numstat.added
            $matchingStatus.deleted = $numstat.deleted
        }
    }
}