Extract Prisma support into an extension (#9820)

This PR extracts Prisma support into an extension and removes the
built-in Prisma support from Zed.

Release Notes:

- Removed built-in support for Prisma, in favor of making it available
as an extension. The Prisma extension will be suggested for download
when you open a `.prisma` file.

extensions/prisma/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "zed_prisma"
+version = "0.0.1"
+edition = "2021"
+publish = false
+license = "Apache-2.0"
+
+[lints]
+workspace = true
+
+[lib]
+path = "src/prisma.rs"
+crate-type = ["cdylib"]
+
+[dependencies]
+zed_extension_api = "0.0.4"

extensions/prisma/LICENSE-APACHE

@@ -0,0 +1 @@
+../../LICENSE-APACHE

extensions/prisma/extension.toml

@@ -0,0 +1,15 @@
+id = "prisma"
+name = "Prisma"
+description = "Prisma support."
+version = "0.0.1"
+schema_version = 1
+authors = ["Matthew Gramigna <matthewgramigna@gmail.com>"]
+repository = "https://github.com/zed-industries/zed"
+
+[language_servers.prisma-language-server]
+name = "Prisma Language Server"
+language = "Prisma"
+
+[grammars.prisma]
+repository = "https://github.com/victorhqc/tree-sitter-prisma"
+commit = "eca2596a355b1a9952b4f80f8f9caed300a272b5"

extensions/prisma/languages/prisma/config.toml

@@ -0,0 +1,9 @@
+name = "Prisma"
+grammar = "prisma"
+path_suffixes = ["prisma"]
+line_comments = ["// "]
+brackets = [
+    { start = "{", end = "}", close = true, newline = true },
+    { start = "[", end = "]", close = true, newline = true },
+    { start = "(", end = ")", close = true, newline = true }
+]

extensions/prisma/languages/prisma/highlights.scm

@@ -0,0 +1,26 @@
+[
+ "datasource"
+ "enum"
+ "generator"
+ "model"
+] @keyword
+
+(comment) @comment
+(developer_comment) @comment
+
+(arguments) @property
+(attribute) @function
+(call_expression) @function
+(column_type) @type
+(enumeral) @constant
+(identifier) @variable
+(string) @string
+
+"(" @punctuation.bracket
+")" @punctuation.bracket
+"[" @punctuation.bracket
+"]" @punctuation.bracket
+"{" @punctuation.bracket
+"}" @punctuation.bracket
+"=" @operator
+"@" @operator

extensions/prisma/src/prisma.rs

@@ -0,0 +1,85 @@
+use std::{env, fs};
+use zed_extension_api::{self as zed, Result};
+
+const SERVER_PATH: &str = "node_modules/.bin/prisma-language-server";
+const PACKAGE_NAME: &str = "@prisma/language-server";
+
+struct PrismaExtension {
+    did_find_server: bool,
+}
+
+impl PrismaExtension {
+    fn server_exists(&self) -> bool {
+        fs::metadata(SERVER_PATH).map_or(false, |stat| stat.is_file())
+    }
+
+    fn server_script_path(&mut self, config: zed::LanguageServerConfig) -> Result<String> {
+        let server_exists = self.server_exists();
+        if self.did_find_server && server_exists {
+            return Ok(SERVER_PATH.to_string());
+        }
+
+        zed::set_language_server_installation_status(
+            &config.name,
+            &zed::LanguageServerInstallationStatus::CheckingForUpdate,
+        );
+        let version = zed::npm_package_latest_version(PACKAGE_NAME)?;
+
+        if !server_exists
+            || zed::npm_package_installed_version(PACKAGE_NAME)?.as_ref() != Some(&version)
+        {
+            zed::set_language_server_installation_status(
+                &config.name,
+                &zed::LanguageServerInstallationStatus::Downloading,
+            );
+            let result = zed::npm_install_package(PACKAGE_NAME, &version);
+            match result {
+                Ok(()) => {
+                    if !self.server_exists() {
+                        Err(format!(
+                            "installed package '{PACKAGE_NAME}' did not contain expected path '{SERVER_PATH}'",
+                        ))?;
+                    }
+                }
+                Err(error) => {
+                    if !self.server_exists() {
+                        Err(error)?;
+                    }
+                }
+            }
+        }
+
+        self.did_find_server = true;
+        Ok(SERVER_PATH.to_string())
+    }
+}
+
+impl zed::Extension for PrismaExtension {
+    fn new() -> Self {
+        Self {
+            did_find_server: false,
+        }
+    }
+
+    fn language_server_command(
+        &mut self,
+        config: zed::LanguageServerConfig,
+        _worktree: &zed::Worktree,
+    ) -> Result<zed::Command> {
+        let server_path = self.server_script_path(config)?;
+        Ok(zed::Command {
+            command: zed::node_binary_path()?,
+            args: vec![
+                env::current_dir()
+                    .unwrap()
+                    .join(&server_path)
+                    .to_string_lossy()
+                    .to_string(),
+                "--stdio".to_string(),
+            ],
+            env: Default::default(),
+        })
+    }
+}
+
+zed::register_extension!(PrismaExtension);