typescript-deno: Adopt .tool-versions and standardise script/ for Deno 2

typescript-deno/.tool-versions

@@ -0,0 +1 @@
+deno 2

typescript-deno/README.md

@@ -2,27 +2,43 @@
 
 Skeleton project for TypeScript with testing via [Deno](https://deno.land/).
 
-Make sure you have Deno installed by running `deno --version`.
+## Prerequisites
 
-If using VSCode, you might want to enable the extension in the settings:
+The toolchain this project needs is declared in [`.tool-versions`](./.tool-versions):
 
-```jsonc
-// .vscode/settings.json
-{
-  "deno.enable": true,
-  // or specifically
-  "deno.enablePaths": ["./typescript-deno"]
-}
+```
+deno 2
+```
+
+Install those however you prefer, as long as they end up on your `PATH`. The quickest route is
+[mise](https://mise.jdx.dev/), which reads the file for you:
+
+```sh
+mise install
 ```
 
 ## Usage
 
-- `./script/start` to run the source code
-- `./script/test` to run the tests in watch mode
+- `./script/setup` to fetch dependencies
+- `./script/test` to run the tests, or `./script/test --watch` to re-run them on every change
+- `./script/start` to run the app
 
 ## Structure
 
 - Code located in [`mod.ts`](./src/mod.ts)
 - Tests located in [`mod.test.ts`](./src/mod.test.ts)
 
 However, you are free to organise your code as you like.
+
+## VSCode
+
+If using VSCode, you might want to enable the Deno extension in the settings:
+
+```jsonc
+// .vscode/settings.json
+{
+  "deno.enable": true,
+  // or specifically
+  "deno.enablePaths": ["./typescript-deno"]
+}
+```

typescript-deno/script/setup

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+cd "$(dirname "${BASH_SOURCE[0]}")/.."
+
+deno cache src/mod.test.ts

typescript-deno/script/start

@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
-set -e
+set -euo pipefail
+
+cd "$(dirname "${BASH_SOURCE[0]}")/.."
 
 deno run src/mod.ts

typescript-deno/script/test

@@ -1,6 +1,8 @@
 #!/usr/bin/env bash
 
-set -e
+set -euo pipefail
+
+cd "$(dirname "${BASH_SOURCE[0]}")/.."
 
 if [[ "${1:-}" == "--watch" ]]; then
   deno test src --watch