linux-kernel-module-cheat/test-build-userland

#!/usr/bin/env bash

# https://cirosantilli.com/linux-kernel-module-cheat#cli-script-tests

set -eux

for in_tree in '' --in-tree; do
  userland_build_dir="$(./getvar $in_tree userland_build_dir)"
  # Toplevel.
  ./build-userland $in_tree
  [ -f "${userland_build_dir}/c/hello.out" ]
  ./build-userland $in_tree --clean
  ! [ -f "${userland_build_dir}/c/hello.out" ]

  # Toplevel explicit.
  ./build-userland $in_tree userland/
  [ -f "${userland_build_dir}/c/hello.out" ]
  ./build-userland $in_tree --clean
  ! [ -f "${userland_build_dir}/c/hello.out" ]

  # Toplevel root dir.
  ./build-userland $in_tree .
  [ -f "${userland_build_dir}/c/hello.out" ]
  ./build-userland $in_tree --clean
  ! [ -f "${userland_build_dir}/c/hello.out" ]

  # Subdirectory.
  ./build-userland $in_tree userland/c
  [ -f "${userland_build_dir}/c/hello.out" ]
  ./build-userland $in_tree --clean userland/c
  ! [ -f "${userland_build_dir}/c/hello.out" ]

  # One program.
  ./build-userland $in_tree userland/c/hello.c
  [ -f "${userland_build_dir}/c/hello.out" ]
  ./build-userland $in_tree --clean userland/c/hello.c
  ! [ -f "${userland_build_dir}/c/hello.out" ]

  # Things that don't work: building:
  # - non-existent files
  # - paths outside of tree
  ! ./build-userland $in_tree userland/c/hello
  ! ./build-userland $in_tree userland/c/hello.
  ! ./build-userland $in_tree "${userland_build_dir}/c/hello.out"
  tmpfile="$(mktemp)"
  ! ./build-userland $in_tree "$tmpfile"
  ! ./build-userland --clean $in_tree "$tmpfile"
  rm "$tmpfile"
  ! ./build-userland $in_tree ..
  ! ./build-userland $in_tree kernel_modules
  ! ./build-userland --clean $in_tree userland/does_not_exist
  ./build-userland --clean $in_tree
done

./build-userland-in-tree
[ -f userland/c/hello.out ]
./build-userland-in-tree --clean
! [ -f userland/c/hello.out ]

cd userland
./build
[ -f c/hello.out ]
./build --clean
! [ -f c/hello.out ]
./build c
[ -f c/hello.out ]
./build --clean c
! [ -f c/hello.out ]
./build --clean c/hello.c
! [ -f c/hello.out ]