#!/bin/sh
# Install what SchOS needs to build and test, on Fedora.
#
#   tools/posix/setup-fedora.sh          install everything
#   tools/posix/setup-fedora.sh --check  report what is missing, install nothing
#
# Written for Fedora 44. Package names are stable enough that older and newer
# releases should work unchanged; the --check mode exists so a wrong guess
# reports itself instead of failing halfway through a dnf transaction.

set -eu

CHECK=0
[ "${1:-}" = "--check" ] && CHECK=1

# Toolchain. clang and lld are the whole cross-compiler story -- see
# docs/building.md for why there is no cross-gcc here.
PKGS="clang lld llvm make gcc perl-interpreter python3 git"

# Running and testing.
PKGS="$PKGS qemu-system-x86 edk2-ovmf xorriso"

# mtools is for building a real FAT ESP image. Not needed yet -- the UEFI
# target serves a directory as FAT through QEMU -- but it is what `make iso`
# will want once the ISO carries an EFI entry.
PKGS="$PKGS mtools"

# Ports are built from source on this host, which is the reason a Linux box
# matters: they cannot be built on Windows at all.
PKGS="$PKGS tar curl xz bzip2 diffutils findutils"

missing=""
for p in $PKGS; do
    rpm -q "$p" >/dev/null 2>&1 || missing="$missing $p"
done

if [ -z "$missing" ]; then
    echo "all packages present"
else
    echo "missing:$missing"
    if [ "$CHECK" -eq 0 ]; then
        echo
        echo "installing..."
        sudo dnf install -y $missing
    fi
fi

# PowerShell is not in Fedora's repositories and is not an rpm you can name.
#
# It matters because tools/windows/bootcheck.ps1 is the test harness, and pwsh
# runs it on Linux perfectly well -- there is simply no dnf package. Microsoft
# publish a repo; the tarball is the lighter option and needs no root beyond
# the install path.
if command -v pwsh >/dev/null 2>&1; then
    echo "pwsh: $(command -v pwsh)"
else
    cat <<'EOF'

pwsh is not installed. tools/windows/bootcheck.ps1 is the boot test suite and
needs it. Either:

  sudo dnf install -y https://packages.microsoft.com/config/rhel/9/packages-microsoft-prod.rpm
  sudo dnf install -y powershell

or take the tarball from https://github.com/PowerShell/PowerShell/releases and
put pwsh on PATH. Nothing else in the build depends on it -- `make`,
`make schfs-check` and `make qemu` all work without.
EOF
fi

echo
echo "checks:"
for t in clang ld.lld llvm-objcopy make gcc perl python3 qemu-system-x86_64 xorriso; do
    if command -v "$t" >/dev/null 2>&1; then
        printf '  %-22s ok\n' "$t"
    else
        printf '  %-22s MISSING\n' "$t"
    fi
done

# KVM is the difference between a boot test that takes seconds and one that
# takes half a minute. It needs the module loaded and the user in the kvm
# group; a Ryzen box has it unless virtualisation is off in firmware.
echo
if [ -e /dev/kvm ]; then
    if [ -r /dev/kvm ] && [ -w /dev/kvm ]; then
        echo "kvm: available and usable -- add -enable-kvm to QEMU for much faster boots"
    else
        echo "kvm: present but not accessible. Fix with:"
        echo "  sudo usermod -aG kvm $(id -un) && newgrp kvm"
    fi
else
    echo "kvm: /dev/kvm missing -- check that SVM/virtualisation is enabled in firmware"
fi