Completion: add zsh-completion (#1213)

* feat: add zsh-completion

* zsh completion: added missing custom options

* cmake: update CMakeList.txt to install zsh completion

* Update CMakeLists.txt

---------

Co-authored-by: Carter Li <CarterLi@users.noreply.github.com>

CMakeLists.txt

@@ -1337,6 +1337,12 @@ install(
     RENAME "${CMAKE_PROJECT_NAME}"
 )
 
+install(
+    FILES "${CMAKE_SOURCE_DIR}/completions/${CMAKE_PROJECT_NAME}.zsh"
+    DESTINATION "${CMAKE_INSTALL_DATAROOTDIR}/zsh/site-functions"
+    RENAME "_${CMAKE_PROJECT_NAME}"
+)
+
 install(
     FILES "${CMAKE_SOURCE_DIR}/completions/${CMAKE_PROJECT_NAME}.fish"
     DESTINATION "${CMAKE_INSTALL_DATAROOTDIR}/fish/vendor_completions.d"

completions/fastfetch.zsh

@@ -0,0 +1,97 @@
+#compdef fastfetch
+
+function _fastfetch() {
+  local state
+
+  local -a opts
+  opts=(${(f)"$(
+        python <<EOF
+import json
+import subprocess
+import sys
+
+
+def main():
+    data: dict[str, list[dict]] = json.loads(
+        subprocess.check_output(["fastfetch", "--help-raw"])
+    )
+
+    for key in data:
+        for flag in data[key]:
+            if flag.get("pseudo", False):
+                continue
+
+            if "short" in flag:
+                command_prefix = f"""-{flag["short"]}[{flag["desc"]}]"""
+                print_command(command_prefix, flag)
+
+            if "long" in flag:
+                command_prefix = f"""--{flag["long"]}[{flag["desc"]}]"""
+                print_command(command_prefix, flag)
+
+
+def print_command(command_prefix: str, flag: dict):
+    if "arg" in flag:
+        type: str = flag["arg"]["type"]
+        if type == "bool":
+            print(f"{command_prefix}:bool:(true false)")
+        elif type == "color":
+            print(f"{command_prefix}:color:(black red green yellow blue magenta cyan white default)")
+        elif type == "command":
+            print(f"{command_prefix}:module:->modules")
+        elif type == "config":
+            print(f"{command_prefix}:presets:->presets")
+        elif type == "enum":
+            temp: str = " ".join(flag["arg"]["enum"])
+            print(f'{command_prefix}:type:( {temp} )')
+        elif type == "logo":
+            print(f"{command_prefix}:logo:->logo")
+        elif type == "structure":
+            print(f"{command_prefix}:structure:->structure")
+        elif type == "path":
+            print(f"{command_prefix}:path:_files -/")
+        else:
+            print(f"{command_prefix}:")
+    else:
+        print(f"{command_prefix}")
+
+
+if __name__ == "__main__":
+    try:
+        main()
+    except Exception:
+        sys.exit(1)
+EOF
+  )"})
+
+  _arguments -C "$opts[@]"
+
+  case $state in
+    modules)
+      local -a modules=( ${(f)"$(fastfetch --list-modules autocompletion)"} )
+      modules=( ${(L)^modules%%:*}-format format color )
+      _describe 'module' modules
+      ;;
+    presets)
+      local -a presets=(
+        ${$(fastfetch --list-presets autocompletion):#.*}
+        "none:Disable loading config file"
+      )
+      _describe 'preset' presets
+      ;;
+    structure)
+      local -a structures=( ${(f)"$(fastfetch --list-modules autocompletion)"} )
+      _describe 'structure' structures
+      ;;
+    logo)
+      local -a logos=(
+        $(fastfetch --list-logos autocompletion)
+        "none:Don't print logo"
+        "small:Print small ascii logo if available"
+      )
+      _describe 'logo' logos
+      ;;
+  esac
+}
+
+_fastfetch "$@"