Nannou: Example from guide build fails

[bcbroom]

I'm unable to run the example cargo run --release --example draw on macOS 10.15.7 (Catalina), and get

Compiling glsl-to-spirv v0.1.7
error: failed to run custom build command for `glsl-to-spirv v0.1.7`

Caused by:
  process didn't exit successfully: `/Users/broom/Documents/code/rust/nannou/target/release/build/glsl-to-spirv-6de94febe694eea4/build-script-build` (exit code: 101)
  --- stdout
  cargo:rerun-if-changed=build/glslangValidator.exe
  running: "cmake" "/Users/broom/.cargo/registry/src/github.com-1ecc6299db9ec823/glsl-to-spirv-0.1.7/glslang" "-DCMAKE_INSTALL_PREFIX=/Users/broom/Documents/code/rust/nannou/target/release/build/glsl-to-spirv-f1f9973f393be420/out" "-DCMAKE_C_FLAGS= -ffunction-sections -fdata-sections -fPIC -m64 -arch x86_64" "-DCMAKE_C_COMPILER=/usr/bin/cc" "-DCMAKE_CXX_FLAGS= -ffunction-sections -fdata-sections -fPIC -m64 -arch x86_64" "-DCMAKE_CXX_COMPILER=/usr/bin/c++" "-DCMAKE_ASM_FLAGS= -ffunction-sections -fdata-sections -fPIC -m64 -arch x86_64" "-DCMAKE_ASM_COMPILER=/usr/bin/cc" "-DCMAKE_BUILD_TYPE=Release"

  --- stderr
  fatal: not a git repository (or any of the parent directories): .git
  thread 'main' panicked at '
  failed to execute command: No such file or directory (os error 2)
  is `cmake` not installed?

  build script failed, must exit now', /Users/broom/.cargo/registry/src/github.com-1ecc6299db9ec823/cmake-0.1.45/src/lib.rs:894:5
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...
error: build failed

I also tried

broom@Brian-Secondary-MBP nannou % rustup update
info: syncing channel updates for 'stable-x86_64-apple-darwin'
info: checking for self-updates

  stable-x86_64-apple-darwin unchanged - rustc 1.48.0 (7eac88abb 2020-11-16)

info: cleaning up downloads & tmp directories
broom@Brian-Secondary-MBP nannou % xcode-select --install
xcode-select: error: command line tools are already installed, use "Software Update" to install updates

[coka]

@bcbroom You need to install CMake. If you install CMake.app using the .dmg from that website, you can check out Tools > How to Install For Command Line Use in the menu bar for details on how to make sure that the cmake command is available from your shell.

@JoshuaBatty (sorry, don't know who to ping) Should CMake installation instructions be added to the guide?

[bcbroom]

That works - thanks.
I installed using brew install cmake

I think adding this to the directions would be a good idea, the directions for macOS say the Xcode command line tools are all you need.

[dimitre]

same issue here. +1 for adding on instructions