Add 32-bit linux build target for Travis (thrasher-corp#389)

* Add 32bit build matrix test

* Adjust travis/Makefile

* Set dist back to xenial

* export CGO_ENABLED=1

* Add gcc-multilib

* Sudo installerino

* make check -> make test

.travis.yml

@@ -13,9 +13,10 @@ matrix:
       script:
         - npm run lint
         - npm run build
+
     - language: go
       dist: xenial
-      name: 'GoCryptoTrader [back-end] [linux]'
+      name: 'GoCryptoTrader [back-end] [linux] [64-bit]'
       go:
         - 1.13.x
       env:
@@ -30,12 +31,39 @@ matrix:
       services:
         - postgresql
       before_script:
-            - psql -c 'create database gct_dev_ci;' -U postgres
+        - psql -c 'create database gct_dev_ci;' -U postgres
       script:
         - make check
       after_success:
         - bash <(curl -s https://codecov.io/bash)
 
+    - language: go
+      dist: xenial
+      name: 'GoCryptoTrader [back-end] [linux] [32-bit]'
+      go:
+        - 1.13.x
+      env:
+        - GO111MODULE=on
+        - NO_RACE_TEST=1
+        - PSQL_USER=postgres
+        - PSQL_HOST=localhost
+        - PSQL_DBNAME=gct_dev_ci
+      install: true
+      cache:
+        directories:
+          - $GOPATH/pkg/mod
+      services:
+        - postgresql
+      before_script:
+        - psql -c 'create database gct_dev_ci;' -U postgres
+      script:
+        - export GOARCH=386
+        - export CGO_ENABLED=1
+        - sudo apt-get install gcc-multilib
+        - make test
+      after_success:
+        - bash <(curl -s https://codecov.io/bash)
+
     - language: go
       os: osx
       name: 'GoCryptoTrader [back-end] [darwin]'

Makefile

@@ -6,6 +6,7 @@ GCTLISTENPORT=9050
 GCTPROFILERLISTENPORT=8085
 CRON = $(TRAVIS_EVENT_TYPE)
 DRIVER ?= psql
+RACE_FLAG := $(if $(NO_RACE_TEST),,-race)
 
 get:
 	GO111MODULE=on go get $(GCTPKG)
@@ -19,9 +20,9 @@ check: linter test
 
 test:
 ifeq ($(CRON), cron)
-	go test -race -tags=mock_test_off -coverprofile=coverage.txt -covermode=atomic  ./...
+	go test $(RACE_FLAG) -tags=mock_test_off -coverprofile=coverage.txt -covermode=atomic  ./...
 else
-	go test -race -coverprofile=coverage.txt -covermode=atomic  ./...
+	go test $(RACE_FLAG) -coverprofile=coverage.txt -covermode=atomic  ./...
 endif
 
 build: