Add CMake module

For now, this module simplifies the creation of build directories.

modules/cmake/README.md

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+CMake
+=====
+
+Initializes build directories for [CMake][1].
+
+### Usage
+
+```sh
+# In the root directory of a CMake project:
+$ mb
+# Or with additional flags:
+$ mb -DSOME_EXTRA_FLAGS="foo"
+```
+
+### Options
+
+```sh
+# Set the install prefix.
+zstyle ':prezto:module:cmake' install-prefix '/usr'
+
+# Set the build prefix.
+zstyle ':prezto:module:cmake' build-prefix '_build'
+
+# Set the build profiles.
+zstyle ':prezto:module:cmake' profiles 'Debug' 'Release'
+
+# Whether to support clang as well.
+zstyle ':prezto:module:cmake' support-clang 'yes'
+```
+
+### Aliases
+
+* `mb` initialize build directories.
+
+
+Authors
+-------
+
+*The authors of this module should be contacted via the [issue tracker][2].*
+
+  - [Benjamin Chrétien](https://github.com/bchretien)
+
+[1]: https://cmake.org
+[2]: https://github.com/sorin-ionescu/prezto/issues

modules/cmake/init.zsh

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+#
+# Initialize build directories for CMake.
+#
+# Authors:
+#   Benjamin Chrétien <chretien dot b at gmail dot com>
+#   Thomas Moulard <thomas dot moulard at gmail dot com>
+#
+
+# Get the install prefix or use the default.
+zstyle -s ':prezto:module:cmake' install-prefix '_cmake_install_prefix' \
+  || _cmake_install_prefix='/usr'
+
+# Get the build prefix.
+zstyle -s ':prezto:module:cmake' build-prefix '_cmake_build_prefix' \
+  || _cmake_build_prefix='_build'
+
+# Get the profiles to consider or use the default.
+zstyle -a ':prezto:module:cmake' profiles '_cmake_profiles' \
+  || _cmake_profiles=(Debug Release)
+
+# Whether to look for clang as well.
+zstyle -b ':prezto:module:cmake' support-clang '_cmake_support_clang' \
+  || _cmake_support_clang=true
+
+# Check for clang
+_cmake_has_clang=false
+if (( ${_cmake_support_clang} && $+commands[clang] )); then
+  _cmake_has_clang=true
+fi
+
+function makeBuildDirectory
+{
+  local extra_flags="$@"
+
+  local d=`pwd`
+  if `test x$(find . -maxdepth 1 -name CMakeLists.txt) = x`; then
+    echo "Run this in your project's root directory"
+    return 1
+  fi
+
+  local common_flags="-DCMAKE_INSTALL_PREFIX=${_cmake_install_prefix}"
+
+  # Create default GCC profiles.
+  for p in "${_cmake_profiles[@]}"; do
+    echo "*** Creating ${p:l} profile..."
+    local build_dir="${d}/${_cmake_build_prefix}/${p:l}"
+    mkdir -p "${build_dir}"
+    (cd "${build_dir}" && \
+      cmake ${common_flags} ${extra_flags} -DCMAKE_BUILD_TYPE=${p} \
+      "${d}")
+    echo "*** ...done!"
+  done
+
+  # If clang is available, create clang profiles.
+  if ${_cmake_has_clang}; then
+    for p in "${_cmake_profiles[@]}"; do
+      echo "*** Creating ${p:l} profile (clang)..."
+      local build_dir="${d}/${_cmake_build_prefix}/clang+${p:l}"
+      mkdir -p "${build_dir}"
+      (cd "${build_dir}" && \
+        CC=clang CXX=clang++ \
+        cmake ${common_flags} ${extra_flags} -DCMAKE_BUILD_TYPE=${p} \
+        "${d}")
+      echo "*** ...done!"
+    done
+  fi
+}
+
+alias mb=makeBuildDirectory
+
+# Enable CMake completion
+(( $+functions[compdef] )) && {
+  compdef _cmake makeBuildDirectory
+}