Build rust-analyzer on FreeBSD.

The official FreeBSD package rust-analyzer crashes. I suspect this is because its built for rust stable which conflicts with the rust-nightly I have installed.

ansible/roles/emacs/files/lang-rust.el

@@ -2,10 +2,28 @@
 (require 'util-tree-sitter)
 
 (defun locate-rust-analyzer ()
+  "Find rust-analyzer."
+  (let ((rust-analyzer-paths (list (locate-rust-analyzer-rustup) (locate-rust-analyzer-ansible-built))))
+    (let ((first-non-nill-path (seq-find (lambda (elt) elt) rust-analyzer-paths)))
+      first-non-nill-path
+      )
+    )
+  )
+
+(defun locate-rust-analyzer-rustup ()
   "Find rust-analyzer through rustup."
   (run-command-in-directory nil "rustup" "which" "rust-analyzer")
   )
 
+(defun locate-rust-analyzer-ansible-built ()
+  "Find rust-analyzer where the ansible playbook built it."
+  (let ((rust-analyzer-path "/opt/rust-analyzer/target/release/rust-analyzer"))
+    (when (file-exists-p rust-analyzer-path)
+      rust-analyzer-path
+      )
+    )
+  )
+
 (use-package rust-mode
   :mode "\\.rs\\'"
   :hook (

ansible/roles/rust/tasks/freebsd.yaml

@@ -2,5 +2,28 @@
   package:
     name:
       - rust-nightly
-      - rust-analyzer
     state: present
+
+- name: Create directories
+  file:
+    name: "{{ item }}"
+    state: directory
+    mode: 0755
+    owner: root
+    group: wheel
+  loop:
+    - "/opt/rust-analyzer"
+
+- name: Clone rust-analyzer Source
+  git:
+    repo: "https://github.com/rust-lang/rust-analyzer.git"
+    dest: /opt/rust-analyzer
+    version: "2023-05-01"
+    force: true
+  diff: false
+
+- name: Build rust-analyzer
+  command: "cargo build --release"
+  args:
+    creates: "/opt/rust-analyzer/target/release/rust-analyzer"
+    chdir: /opt/rust-analyzer