make webi great again

webi/webi.bash

@@ -7,12 +7,12 @@
 #   for the people like us that are too lazy even to run <kbd>curl&nbsp;https://webinstall.dev/PACKAGE_NAME&nbsp;|&nbsp;bash</kbd>
 # examples: |
 #   ```bash
-#   webi node
+#   webi node@latest
 #   ```
 #   <br/>
 #
 #   ```bash
-#   webi golang
+#   webi golang@v1.14
 #   ```
 #   <br/>
 #
@@ -20,19 +20,73 @@
 #   webi rustlang
 #   ```
 
-# TODO webi package@semver#channel
+{
+
+mkdir -p "$HOME/.local/bin"
+
+cat << EOF > "$HOME/.local/bin/webi"
+#!/bin/bash
 
-cat << EOF > ~/.local/bin/webi
 set -e
 set -u
 
-my_package=\${1:-}
+my_package="\${1:-}"
 if [ -z "\$my_package" ]; then
-	echo "Usage: webi <package>"
-	echo "Example: webi node"
+	echo "Usage: webi <package>@<version>"
+	echo "Example: webi node@latest"
 	exit 1
 fi
 
-curl -fsSL "https://webinstall.dev/\$my_package" | bash
+##
+## Detect acceptable package formats
+##
+
+my_ext=""
+set +e
+if [ -n "\$(command -v git)" ]; then
+	my_ext="git,\${my_ext}"
+fi
+if [ -n "\$(command -v tar)" ]; then
+	my_ext="tar,\${my_ext}"
+fi
+if [ -n "\$(command -v unzip)" ]; then
+	my_ext="zip,\${my_ext}"
+fi
+if [ -n "\$(command -v pkgutil)" ]; then
+	my_ext="pkg,\${my_ext}"
+fi
+if [ -n "\$(command -v diskutil)" ]; then
+	# note: could also detect via hdiutil
+	my_ext="dmg,\${my_ext}"
+fi
+set -e
+
+##
+## Detect http client
+##
+set +e
+export WEBI_CURL="\$(command -v curl)"
+export WEBI_WGET="\$(command -v wget)"
+set -e
+
+export WEBI_BOOT="\$(mktemp -d -t "\$my_package-bootstrap.XXXXXXXX")"
+export WEBI_UA="\$(uname -a)"
+
+if [ -n "\$WEBI_CURL" ]; then
+	curl -fsSL "https://webinstall.dev/\$my_package?ext=\$my_ext" -H "User-Agent: curl \$WEBI_UA" \\
+		-o "\$WEBI_BOOT/\$my_package-bootstrap.sh"
+else
+	wget -q "https://webinstall.dev/\$my_package?ext=\$my_ext" --user-agent="wget \$WEBI_UA" \\
+		-O "\$WEBI_BOOT/\$my_package-bootstrap.sh"
+fi
+
+pushd "\$WEBI_BOOT" 2>&1 > /dev/null
+	bash "\$my_package-bootstrap.sh"
+popd 2>&1 > /dev/null
+
+rm -rf "\$WEBI_BOOT"
 EOF
+
 chmod a+x ~/.local/bin/webi
+
+}