travis: Don't try and build ESP8266

Author: tannewt

tools/build_adafruit_bins.sh

@@ -7,8 +7,10 @@ for board in $ATMEL_BOARDS; do
     make -C atmel-samd BOARD=$board
     (( exit_status = exit_status || $? ))
 done
-make -C esp8266 BOARD=feather_huzzah
-(( exit_status = exit_status || $? ))
+if [ -z "$ARTIFACTS_BUCKET" ]; then
+    make -C esp8266 BOARD=feather_huzzah
+    (( exit_status = exit_status || $? ))
+fi
 
 version=`git describe --tags --exact-match`
 if [ $? -ne 0 ]; then
@@ -22,8 +24,12 @@ for board in $ATMEL_BOARDS; do
     python2 tools/uf2/utils/uf2conv.py -c -o bin/$board/adafruit-circuitpython-$board-$version.uf2 bin/$board/adafruit-circuitpython-$board-$version.bin
     (( exit_status = exit_status || $? ))
 done
-mkdir -p bin/esp8266/
-cp esp8266/build/firmware-combined.bin bin/esp8266/adafruit-circuitpython-feather_huzzah-$version.bin
-(( exit_status = exit_status || $? ))
+
+# Skip ESP8266 on Travis
+if [ -z "$ARTIFACTS_BUCKET" ]; then
+    mkdir -p bin/esp8266/
+    cp esp8266/build/firmware-combined.bin bin/esp8266/adafruit-circuitpython-feather_huzzah-$version.bin
+    (( exit_status = exit_status || $? ))
+fi
 
 exit $exit_status