move pill fetch to script

.travis.yml

@@ -7,9 +7,6 @@ before_install:
       chmod +x ./urbit;
       echo "FIXME downloaded raw urbit binary releaseinstead of .deb";
       echo "FIXME read full pinned url instead of tag name"
-  
-  - >
-      HASH=$(git -C .. log -1 HEAD --format="%H" -- sys/) &&
-      wget https://bootstrap.urbit.org/$HASH-master.pill -O urbit.pill;
-      echo "FIXME blindly assumed master pill"
+      
+before_script: bash make-pill.sh
       

.travis/make-pill.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+# XX use -s instead of hash pill
+HASH=$(git -C .. log -1 HEAD --format="%H" -- sys/)
+
+echo FIXME blindly assuming master pill
+wget https://bootstrap.urbit.org/$HASH-master.pill -O urbit.pill && exit 0
+
+# if wget failed
+if [ $TRAVIS_COMMIT ] && [ $TRAVIS_COMMIT != $HASH ]; then
+  echo Directory sys/ not modified in commit $TRAVIS_COMMIT
+  # echo For auto-build please tag and push $HASH
+  echo FIXME Please manually build and upload $HASH-master.pill
+  exit 1
+fi
+echo STUB should build a pill here
+exit 1

.travis/pin-parent-pill.url

@@ -0,0 +1 @@
+https://github.com/ohAitch/urbit/releases/download/untagged-4dd5d7e977e58b5f1e21/urbit

.travis/test.ls

@@ -3,7 +3,6 @@ pty = require \pty.js
 
 term =
   # TODO abort on failure
-  # XX use -s instead of travis wget'd pill
   pty.spawn './urbit' <[-B urbit.pill -A .. -cFI zod zod]> 
      .on \data -> process.stdout.write it