chore(install): fix install scripts & improve local usage (#2041)

Fix a few minor problems with Travis install & build scripts.
Other changes allow `before-install.sh` to be run locally.

Author: chalin

scripts/before-install.sh

@@ -2,13 +2,11 @@
 
 set -e -o pipefail
 
-./scripts/env-info-and-check.sh
+[[ -z "$NGIO_ENV_DEFS" ]] && . ./scripts/env-set.sh
+[[ -n "$TRAVIS" ]] && . ./scripts/env-info-and-check.sh
 
-if [[ 0 ]]; then
-    # Doesn't seem to be necessary. Disabling.
-    travis_fold start install.globals
+if [ -z "$TRAVIS" ]; then
     set -x
     npm install -g gulp --no-optional
     set +x
-    travis_fold end install.globals
 fi

scripts/env-info-and-check.sh

@@ -2,6 +2,8 @@
 
 set -e -o pipefail
 
+[[ -z "$NGIO_ENV_DEFS" ]] && . ./scripts/env-set.sh
+
 travis_fold start env_info
 echo ENVIRONMENT INFO
 travis_fold start env_info.path
@@ -11,7 +13,7 @@ echo
 travis_fold end env_info.path
 travis_fold start env_info.home
 echo Home: $HOME
-ls ~ -la
+ls -la ~
 echo 
 travis_fold end env_info.home
 travis_fold start env_info.pwd

scripts/env-set.sh

@@ -3,7 +3,7 @@
 if [[ -z "$NGIO_ENV_DEFS" ]]; then
     export ANSI_YELLOW="\033[33;1m"
     export ANSI_RESET="\033[0m"
-    echo -e "${ANSI_YELLOW}Setting environment variables from scripts/env.sh${ANSI_RESET}"
+    echo -e "${ANSI_YELLOW}Setting environment variables from scripts/env-set.sh${ANSI_RESET} "
 
     export NGIO_ENV_DEFS=1
 
@@ -12,7 +12,7 @@ if [[ -z "$NGIO_ENV_DEFS" ]]; then
 
     if [ ! $(type -t travis_fold) ]; then
         # In case this is being run locally. Turn travis_fold into a noop.
-        travis_fold () { return; }
+        travis_fold () { true; }
         # Alternative definition:
         # travis_fold () { echo -en "travis_fold:${1}:${2}"; }
     fi