Added Rust crates script

Necessary to implement the installation of Rust and associated crates
which can be used by downstream configurations. This functionality was
originally part of the macOS Configuration project but has been moved
here to provide a common foundation in which to build upon.

lib/installers.sh

@@ -171,6 +171,15 @@ install_program() {
 }
 export -f install_program
 
+# Installs Rust.
+# Parameters: None.
+install_rust() {
+  if ! command -v cargo > /dev/null; then
+    curl --proto "=https" --tlsv1.2 --fail --silent --show-error https://sh.rustup.rs | sh
+  fi
+}
+export -f install_rust
+
 # Installs an application via a tar file.
 # Parameters: $1 (required) - URL, $2 (required) - Application name, $3 (required) - Decompress options.
 install_tar_app() {

lib/options.sh

@@ -22,6 +22,8 @@ process_option() {
       bin/install_applications;;
     'x')
       bin/install_extensions;;
+    'rc')
+      bin/install_rust_crates;;
     'd')
       bin/apply_default_settings;;
     's')
@@ -35,6 +37,7 @@ process_option() {
       bin/install_app_store
       bin/install_applications
       bin/install_extensions
+      bin/install_rust_crates
       bin/apply_default_settings
       bin/setup_software
       clean_work_path;;
@@ -46,7 +49,8 @@ process_option() {
       verify_homebrew_casks
       verify_app_store_applications
       verify_applications
-      verify_extensions;;
+      verify_extensions
+      verify_rust_crates;;
     'C')
       caffeinate_machine;;
     'ua')

lib/verifiers.sh

@@ -126,3 +126,20 @@ verify_path() {
   fi
 }
 export -f verify_path
+
+# Checks for missing Rust crates.
+verify_rust_crates() {
+  printf "\nChecking Rust crates...\n"
+
+  local crates="$(ls -A1 $HOME/.cargo/bin)"
+
+  while read line; do
+    if [[ "$line" == "cargo install"* ]]; then
+      local crate=$(printf "$line" | awk '{print $3}')
+      verify_listed_application "$crate" "${crates[*]}"
+    fi
+  done < "$MAC_OS_CONFIG_PATH/bin/install_rust_crates"
+
+  printf "Rust crates check complete.\n"
+}
+export -f verify_rust_crates