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

Author: mxcl

README.md

@@ -32,11 +32,6 @@ $ pkgx +rust
 > See [`@pkgxdev/dev`] to run the `dev` command in a GitHub Actions compatible manner
 
 
-### Shell Integration
-
-We cannot integrate with the GitHub Actions shell. But you probably don’t
-need it.
-
 ### Should you Cache `~/.pkgx`?
 
 No. pkgx packages are just tarballs. Caching is just a tarball. You’ll likely
@@ -52,8 +47,8 @@ To install `pkgx`:
 ```sh
 $ curl https://pkgx.sh | sh
 
-# - installs to `/usr/local/bin/pkgx`
-# - if pkgx is already installed it’s a noop
+# - installs `pkgx` & `pkgm` to `/usr/local/bin`
+# - if both are already installed, does an update check
 ```
 
 ## Temporary Sandboxes

installer.sh

@@ -117,7 +117,7 @@ _install_pkgx() {
     progress="--progress-bar"
   fi
 
-  tmpdir=$(mktemp -d)
+  tmpdir="$(mktemp -d)"
 
   if [ $# -eq 0 ]; then
     if [ -f /usr/local/bin/pkgx ]; then
@@ -130,10 +130,14 @@ _install_pkgx() {
     pipe="$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