[issue-117] Unzip

README.md

@@ -110,3 +110,34 @@ scoop reset deno
 ## Compatibility
 
 - The Shell installer can be used on Windows via the [Windows Subsystem for Linux](https://docs.microsoft.com/en-us/windows/wsl/about).
+
+## Known Issues
+
+### unzip is required
+
+The program [`unzip`](https://linux.die.net/man/1/unzip) is a requirement for the Shell installer.
+
+```sh
+$ curl -fsSL https://deno.land/x/install/install.sh | sh
+Error: unzip is required to install Deno (see: https://github.com/denoland/deno_install#unzip-is-required).
+```
+
+**When does this issue occur?**
+
+During the `install.sh` process, `unzip` is used to extract the zip archive.
+
+**How can this issue be fixed?**
+
+You can install unzip via `brew install unzip` on MacOS or `apt-get install unzip -y` on Linux.
+
+**When does this issue occur?**
+
+If your systems' [ExecutionPolicy](https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_execution_policies) is `Undefined` or `Restricted`.
+
+**How can this issue be fixed?**
+
+Allow scripts that are downloaded from the internet to be executed by setting the execution policy to `RemoteSigned`:
+
+```powershell
+Set-ExecutionPolicy RemoteSigned -Scope CurrentUser -Force
+```

install.sh

@@ -4,6 +4,16 @@
 
 set -e
 
+if [ "$(uname -m)" != "x86_64" ]; then
+	echo "Error: Unsupported architecture $(uname -m). Only x64 binaries are available." 1>&2
+	exit 1
+fi
+
+if ! command -v unzip >/dev/null; then
+	echo "Error: unzip is required to install Deno (see: https://github.com/denoland/deno_install#unzip-is-required)." 1>&2
+	exit 1
+fi
+
 case $(uname -s) in
 Darwin) target="x86_64-apple-darwin" ;;
 *) target="x86_64-unknown-linux-gnu" ;;
@@ -16,11 +26,14 @@ fi
 
 if [ $# -eq 0 ]; then
 	deno_asset_path=$(
-		command curl -sSf https://github.com/denoland/deno/releases |
-			command grep -o "/denoland/deno/releases/download/.*/deno-${target}\\.zip" |
-			command head -n 1
+		curl -sSf https://github.com/denoland/deno/releases |
+			grep -o "/denoland/deno/releases/download/.*/deno-${target}\\.zip" |
+			head -n 1
 	)
-	if [ ! "$deno_asset_path" ]; then exit 1; fi
+	if [ ! "$deno_asset_path" ]; then
+		echo "Error: Unable to find latest Deno release on GitHub." 1>&2
+		exit 1
+	fi
 	deno_uri="https://github.com${deno_asset_path}"
 else
 	deno_uri="https://github.com/denoland/deno/releases/download/${1}/deno-${target}.zip"