feat: add Windows support to sendme.sh (#317)

* Add Windows support for `sendme.sh`

This support is for users who have access to a terminal which supports running shell scripts.

* Add missing backslash

Author: neuralpain

public/sendme.sh

@@ -1,14 +1,14 @@
 #!/bin/sh
 # Copyright 2023 n0. All rights reserved. Dual MIT/Apache license.
+# Windows support provided by neuralpain.
 
 set -e
 
 repo="n0-computer/sendme"
 release_url="https://api.github.com/repos/$repo/releases/latest"
 
 if [ "$OS" = "Windows_NT" ]; then
-    echo "Error: this installer only works on linux & macOS." 1>&2
-    exit 1
+    target="windows-x86_64"
 else
     case $(uname -sm) in
     "Darwin x86_64") target="darwin-x86_64" ;;
@@ -27,4 +27,16 @@ release_target_url=$(
     sed -re 's/.*: "([^"]+)".*/\1/' \
 )
 
-curl -sL "$release_target_url" | tar xz
+if [[ "$release_target_url" =~ \.zip$ ]]; then
+    release_archive=$(
+        curl -s "$release_url" |
+        grep "name" |
+        grep "$target" |
+        sed -re 's/.*: "([^"]+)".*/\1/' \
+    )
+    curl -sL "$release_target_url" -o $release_archive
+    unzip -oq $release_archive
+    rm -rf $release_archive
+else
+    curl -sL "$release_target_url" | tar xz
+fi