Fix never using git for the pantry overlay step

Author: mxcl

README.md

@@ -16,7 +16,7 @@
 </p>
 
 
-# tea/cli 0.31.1
+# tea/cli 0.31.2
 
 `tea` puts the whole open source ecosystem at your fingertips:
 

src/hooks/useSync.ts

@@ -52,8 +52,8 @@ export default async function() {
 async function git(...args: (string | Path)[]) {
   const pkg = await useCellar().has({ project: 'git-scm.org', constraint: new semver.Range('*') })
   const git = (pkg?.path ?? usr())?.join("bin/git")
-  if (git) await run({cmd: [git, ...args]})
-  throw new Error("no-git")  // caught above to trigger http download instead
+  if (!git) throw new Error("no-git")  // caught above to trigger http download instead
+  await run({cmd: [git, ...args]})
 
   function usr() {
     // only return /usr/bin if in the PATH so user can explicitly override this
@@ -64,7 +64,7 @@ async function git(...args: (string | Path)[]) {
     if (host().platform == 'darwin') {
       if (new Path("/Library/Developer/CommandLineTools/usr/bin/git").isExecutableFile()) return rv
       if (new Path("/Application/Xcode.app").isDirectory()) return rv
-      return
+      return  // don’t use `git`
     }
 
     return  rv