slotgate 0.4.2

# slotgate stage 2 gate: CRAP scores and mirrored test coverage.
# Run alongside stage 1; if it is not green, the work is not done.

Set-Location (Split-Path -Parent $PSScriptRoot)

function Invoke-Stern4RustGate {
    param(
        [string]$Name,
        [string[]]$Packages
    )

    Write-Host ""
    Write-Host "=== $Name ===" -ForegroundColor Cyan

    if (-not (Get-Command cargo-stern4rust -ErrorAction SilentlyContinue)) {
        Write-Host "cargo-stern4rust is not installed." -ForegroundColor Red
        Write-Host "Install it with: cargo install cargo-stern4rust" -ForegroundColor Red
        exit 1
    }

    $manifestPath = (Resolve-Path (Join-Path $PSScriptRoot "..\Cargo.toml")).Path
    $args = @("stern4rust", "--manifest-path", $manifestPath)
    foreach ($package in $Packages) {
        $args += @("--package", $package)
    }

    $previousErrorActionPreference = $ErrorActionPreference
    $ErrorActionPreference = "Continue"
    $output = & cargo @args 2>&1
    $ErrorActionPreference = $previousErrorActionPreference
    $exitCode = $LASTEXITCODE
    $output | ForEach-Object { Write-Host $_ }

    # 2 is a rule broken; 1 is the tool failing to run at all. Kept apart so a
    # bad manifest cannot read as a clean codebase.
    if ($exitCode -eq 2) {
        Write-Host "FAILED: $Name (a house coding rule was broken)" -ForegroundColor Red
        exit 1
    }
    if ($exitCode -ne 0) {
        Write-Host "FAILED: $Name (could not run, exit $exitCode)" -ForegroundColor Red
        exit 1
    }
}

function Invoke-Crap4RustGate {
    param(
        [string]$Name,
        [string[]]$Packages,
        [double]$Threshold = 15
    )

    Write-Host ""
    Write-Host "=== $Name ===" -ForegroundColor Cyan

    if (-not (Get-Command cargo-crap4rust -ErrorAction SilentlyContinue)) {
        Write-Host "cargo-crap4rust is not installed." -ForegroundColor Red
        Write-Host "Install it with: cargo install cargo-crap4rust" -ForegroundColor Red
        exit 1
    }

    $manifestPath = (Resolve-Path (Join-Path $PSScriptRoot "..\Cargo.toml")).Path
    $args = @("crap4rust", "--manifest-path", $manifestPath)
    foreach ($package in $Packages) {
        $args += @("--package", $package)
    }
    $args += @("--warn-only", "--threshold", $Threshold.ToString())

    $previousErrorActionPreference = $ErrorActionPreference
    $ErrorActionPreference = "Continue"
    $output = & cargo @args 2>&1
    $ErrorActionPreference = $previousErrorActionPreference
    $exitCode = $LASTEXITCODE
    $output | ForEach-Object { Write-Host $_ }

    if ($exitCode -ne 0) {
        Write-Host "FAILED: $Name (exit $exitCode)" -ForegroundColor Red
        exit $exitCode
    }

    $summaryLine = $output | Select-String -Pattern "summary:\s+total_functions=.*crappy_functions=(\d+)"
    if (-not $summaryLine) {
        Write-Host "FAILED: $Name (could not parse crap4rust summary)" -ForegroundColor Red
        exit 1
    }

    $crappyCount = [int]$summaryLine.Matches[0].Groups[1].Value
    if ($crappyCount -gt 0) {
        Write-Host "FAILED: $Name ($crappyCount crappy functions detected)" -ForegroundColor Red
        exit 1
    }
}

function Invoke-Twin4RustGate {
    param(
        [string]$Name,
        [string[]]$Packages
    )

    Write-Host ""
    Write-Host "=== $Name ===" -ForegroundColor Cyan

    if (-not (Get-Command cargo-twin4rust -ErrorAction SilentlyContinue)) {
        Write-Host "cargo-twin4rust is not installed." -ForegroundColor Red
        Write-Host "Install it with: cargo install cargo-twin4rust" -ForegroundColor Red
        exit 1
    }

    $manifestPath = (Resolve-Path (Join-Path $PSScriptRoot "..\Cargo.toml")).Path
    $args = @("twin4rust", "--manifest-path", $manifestPath)
    foreach ($package in $Packages) {
        $args += @("--package", $package)
    }

    $previousErrorActionPreference = $ErrorActionPreference
    $ErrorActionPreference = "Continue"
    $output = & cargo @args 2>&1
    $ErrorActionPreference = $previousErrorActionPreference
    $exitCode = $LASTEXITCODE
    $output | ForEach-Object { Write-Host $_ }

    if ($exitCode -ne 0) {
        Write-Host "FAILED: $Name (source files without a mirrored test)" -ForegroundColor Red
        exit 1
    }
}

function Invoke-Iceberg4RustGate {
    param(
        [string]$Label,
        [string[]]$Packages,
        [string]$Threshold
    )

    Write-Host "$Label..." -ForegroundColor Cyan

    if (-not (Get-Command cargo-iceberg4rust -ErrorAction SilentlyContinue)) {
        Write-Host "`ncargo-iceberg4rust is not installed." -ForegroundColor Red
        Write-Host "Install it with: cargo install cargo-iceberg4rust" -ForegroundColor Red
        Pop-Location
        exit 1
    }

    $manifestPath = (Resolve-Path (Join-Path $PSScriptRoot "..\Cargo.toml")).Path

    # The ceiling is passed as a string rather than a [double] so it reaches the
    # CLI unchanged. Interpolating a [double] formats it with the current culture,
    # which emits a comma decimal separator on some locales and fails to parse.
    $args = @("iceberg4rust", "--manifest-path", $manifestPath, "--threshold", $Threshold)
    foreach ($package in $Packages) {
        $args += @("--package", $package)
    }

    $previousErrorActionPreference = $ErrorActionPreference
    $ErrorActionPreference = "Continue"
    $output = & cargo @args 2>&1
    $ErrorActionPreference = $previousErrorActionPreference
    $exitCode = $LASTEXITCODE
    $output | ForEach-Object { Write-Host $_ }

    # 2 is the tool's own "offenders found"; anything else non-zero means it
    # could not run at all.
    if ($exitCode -eq 2) {
        Write-Host "`nFailed: $Label (file at or above the ceiling of $Threshold)" -ForegroundColor Red
        Pop-Location
        exit 1
    }
    if ($exitCode -ne 0) {
        Write-Host "`nFailed: $Label (exit code $exitCode)" -ForegroundColor Red
        Pop-Location
        exit 1
    }
}

# stern4rust runs first: its corrections are renames, file moves and directory
# splits, so a layout it is about to reject is a layout the other three would
# have measured for nothing. Its findings are also the cheapest to act on.
#
# Every rule it has is enforced, with nothing skipped. The header rule is the
# one exception and reports itself as not applied: it needs --header-file, and
# this repository has no header file to point it at.
Invoke-Stern4RustGate "House rules slotgate" @("slotgate")

Invoke-Crap4RustGate "CRAP slotgate" @("slotgate")

Invoke-Twin4RustGate "Mirrored tests slotgate" @("slotgate")

# Lowered from 2.6 to 1.8 when `gate_runner.rs` dropped from 2.58 to 1.78:
# pre-build resolution moved to `config/pre_build_resolver.rs`, where it
# belonged. The ratchet follows the score down, never the other way.
Invoke-Iceberg4RustGate "File risk slotgate" @("slotgate") -Threshold "1.8"


Write-Host ""
Write-Host "slotgate stage 2 passed!" -ForegroundColor Green