Install pkgm alongside pkgx

* Not a complete implementation since we need to check if there’s a newer pkgm separate to pkgx.
* Default action to install pkgx^1 by default since we need a major version bump to switch to ^2

action.ts

@@ -45,7 +45,7 @@ async function go() {
     data: prefix.join(".data"),
     cache: prefix.join(".cache"),
     pantries: [],
-    UserAgent: 'pkgx.setup/0.1.0', //TODO version
+    UserAgent: 'pkgx.setup/0.2.0', //TODO version
     options: { compression: 'gz' }
   })
   const { map, flatten } = useShellEnv()

action.yml

@@ -18,8 +18,8 @@ inputs:
   version:
     description: >
       The version of `pkgx` to install.
-      Defaults to the @latest.
-    required: false
+      Defaults to ^1.
+    required: ^1
 runs:
   using: node20
   main: dist/out/index.js

installer.sh

@@ -56,7 +56,7 @@ _install_pkgx() {
     progress="--progress-bar"
   fi
 
-  tmpdir=$(mktemp -d)
+  tmpdir="$(mktemp -d)"
 
   if [ $# -eq 0 ]; then
     if [ -f /usr/local/bin/pkgx ]; then
@@ -69,10 +69,14 @@ _install_pkgx() {
     pipe="$tmpdir/pipe"
     mkfifo "$pipe"
 
+    curl --silent --fail --proto '=https' -o "$tmpdir/pkgm" \
+      https://pkgxdev.github.io/pkgm/pkgm.ts
+
     curl $progress --fail --proto '=https' "https://pkgx.sh/$(uname)/$(uname -m)".tgz > "$pipe" &
     $SUDO sh -c "
       mkdir -p /usr/local/bin
       tar xz --directory /usr/local/bin < '$pipe'
+      install -m 755 "$tmpdir/pkgm" /usr/local/bin
     " &
     wait