oh works in PowerShell: ohub.exe and install.ps1, which respects the execution policy (closes #319); the images page tells peer-held images apart (refs #342); a queued job's reason names CPUs 5d66f27cebe2

# Install oh for this Windows user (oxygenhub#319). Run it from the

# unpacked zip:   powershell -ExecutionPolicy Bypass -File .\install.ps1

#

# - Copies oh.exe and ohub.exe to %LOCALAPPDATA%\Programs\oh and puts that

#   folder on this user's PATH.

# - PowerShell has a built-in alias `oh` (Out-Host) that hides oh.exe. Where

#   PowerShell runs scripts, this removes the alias in your profile; under

#   Windows' default policy (Restricted) a profile cannot run at all, so it

#   leaves that alone and you use `ohub`, which always works. It never

#   changes your execution policy.

# Nothing here needs administrator rights; run it again to update.

$ErrorActionPreference = 'Stop'

$here = Split-Path -Parent $MyInvocation.MyCommand.Path

$dest = Join-Path $env:LOCALAPPDATA 'Programs\oh'

New-Item -ItemType Directory -Force -Path $dest | Out-Null

foreach ($exe in 'oh.exe', 'ohub.exe') {

    Copy-Item -Force (Join-Path $here $exe) (Join-Path $dest $exe)

}

$path = [Environment]::GetEnvironmentVariable('Path', 'User')

$parts = @($path -split ';' | Where-Object { $_ -ne '' })

if ($parts -notcontains $dest) {

    [Environment]::SetEnvironmentVariable('Path', (($parts + $dest) -join ';'), 'User')

    Write-Host "Added $dest to your PATH (new terminals see it)."

}

$marker = '# oh: PowerShell''s alias `oh` (Out-Host) hides oh.exe (oxygenhub#319)'

$line = 'Remove-Item Alias:oh -Force -ErrorAction SilentlyContinue'

$profilePath = $PROFILE.CurrentUserAllHosts

# A profile runs only where scripts may: under Restricted (Windows' default)

# or AllSigned (an unsigned profile) it would print an error in every new

# PowerShell instead, and the alias would stay.

# The policy a new PowerShell gets, not this one's (run with -ExecutionPolicy

# Bypass, this process may run anything): the first scope that sets one,

# else Restricted, the client default.

$policy = 'Restricted'

foreach ($scope in 'MachinePolicy', 'UserPolicy', 'CurrentUser', 'LocalMachine') {

    $p = Get-ExecutionPolicy -Scope $scope

    if ("$p" -ne 'Undefined') { $policy = "$p"; break }

}

if ($policy -in 'RemoteSigned', 'Unrestricted', 'Bypass') {

    if (-not (Test-Path $profilePath)) {

        New-Item -ItemType File -Force -Path $profilePath | Out-Null

    }

    if (-not (Select-String -Path $profilePath -SimpleMatch -Quiet -Pattern $line)) {

        Add-Content -Path $profilePath -Value "`r`n$marker`r`n$line"

        Write-Host "Your PowerShell profile ($profilePath) now removes the oh alias."

    }

    Remove-Item Alias:oh -Force -ErrorAction SilentlyContinue

    Write-Host "oh is installed: open a new terminal and run 'oh --version' (or 'ohub --version')."

} else {

    Write-Host "oh is installed: open a new terminal and run 'ohub --version'."

    Write-Host "PowerShell runs no scripts here (execution policy $policy), so its alias 'oh' (Out-Host) stays: use 'ohub', or 'oh.exe'. Command Prompt runs 'oh' as it is."

}

- **`oh` works in PowerShell (#319).** PowerShell has a built-in alias `oh` (for `Out-Host`), so `oh --version` ran that and failed. The Windows zip now carries `ohub.exe`, the same program under a name nothing hides, and `install.ps1`, which installs both for the current user and puts them on `PATH`. Where PowerShell runs scripts it also removes the alias in the profile; under Windows' default policy, where a profile cannot run and would only print an error, it says to use `ohub` and never changes the policy. Tried on the Windows VM under both policies.

- **Admin › Runners › Images tells a peer-held image from the hub's own (#342).** An image only runners hold shows as "manifest" (sent by which runner) rather than "hub", and one no runner holds now is marked nowhere, as an image the hub lacks is.

- **A queued job's reason names CPUs too.** A runner with a free slot but not the room for a job was said to lack "the memory or disk"; earth-1's limit is often its CPUs (5, with a 4-vCPU job running), so it says "the memory, CPUs or disk".

- **Windows:** unzip `oh-VERSION-windows-x86_64.zip` and run `powershell -ExecutionPolicy Bypass -File .\install.ps1` in the folder: it installs for you alone, puts `oh` on your `PATH`, and removes PowerShell's built-in alias `oh` (for `Out-Host`) in your profile, which would otherwise run instead. `ohub` is the same program under a name nothing hides. SmartScreen may warn on first run, since the build is not signed.

            busy.push(format!("{} has a free slot ({n} of {slots}) but not the memory, CPUs or disk for it now", r.name));

    /// Nowhere a job could get it: nobody holds it, and the hub has at most

    /// its manifest (oxygenflow#94).

        self.places.iter().all(|p| p.kind == "peer")

        // An image only runners hold (oxygenflow#94): the hub keeps its

        // manifest, and the runners holding it serve its chunks.

        r.places.push(if k.source == "peer" {

            Place {

                name: "manifest".into(),

                kind: "peer",

                title: format!("The hub keeps only its manifest, sent by {}; runners holding it serve its {} chunks", k.holder, k.chunks),

            }

        } else {

            Place { name: "hub".into(), kind: "hub", title: format!("{} chunks kept by the hub", k.chunks) }

        });

    assert!(build.waiting.contains("earth-9 has a free slot (1 of 2) but not the memory, CPUs or disk for it now"), "{}", build.waiting);

    // An image only runners held (oxygenflow#94), and none holds it now.

    let lost = jet::images::scan(&[7u8; 4096][..], Some("x86_64".into()), |_, _| Ok(())).unwrap();

    oxygenhub::images::record_peer(&h.app.db, &lost, "mars-1").await.unwrap();

    let peer_only = row(&lost.hash);

    assert!(peer_only.contains("img-peer") && peer_only.contains("sent by mars-1") && peer_only.contains("nowhere"), "{peer_only}");

    # PowerShell's built-in alias `oh` (Out-Host) hides oh.exe (#319):

    # ohub.exe is the same program under a name nothing hides, and

    # install.ps1 puts both on PATH and removes the alias in the profile.

    cp "$built" "$stage/ohub.exe"

    cp packaging/windows/install.ps1 "$stage/"

.lbl.img-peer { color: var(--acc); border-color: var(--acc); border-style: dashed; }