gitgrepblame: Combination of "git grep" and "git blame".

gitgrepblame.ps1

<#
.SYNOPSIS
Combination of "git grep" and "git blame".
#>
function gitgrepblame {
    Param([Parameter(Mandatory)][string]$Query)

    # grep "--null" uses null separators, blame "-c" uses tab separators.
    git.exe --no-pager grep --null --line-number $Query `
    | Select-String -Pattern '(?<Filename>[^\0]+)\0(?<Line>[1-9][0-9]*)\0\s*(?<Text>.+)' `
    | Select-Object -ExpandProperty Matches `
    | ForEach-Object {
        $filename = $_.Groups['Filename'].Value
        $lineno = [int]$_.Groups['Line'].Value
        # $line = $_.Groups['Text'].Value
        git.exe --no-pager blame -c --show-name --show-number -L "$lineno,$lineno" -- $filename `
        | Select-String -Pattern '(?<Hash>[0-9a-fA-F]+)\t\(\s*(?<Author>.+)\t(?<Date>.+)\t\s*(?<Line>[1-9][0-9]*)\)\s*(?<Text>.+)' `
        | Select-Object -ExpandProperty Matches `
        | ForEach-Object {
            [PSCustomObject]@{
                Hash   = $_.Groups['Hash'].Value
                Author = $_.Groups['Author'].Value
                # DateTime cast will convert to local time.
                Date   = [DateTime]$_.Groups['Date'].Value
                Path   = $filename
                Line   = [int]$_.Groups['Line'].Value
                Text   = $_.Groups['Text'].Value
            }
        }
    }
}