Fixes for multiplatform dev and testing from forks (#7734)

Add support for correct dependency URLs on all platforms

only build mountinfo.go on linux

make testfile path relative to support fork work

Makefile

@@ -2,6 +2,9 @@ PWD := $(shell pwd)
 GOPATH := $(shell go env GOPATH)
 LDFLAGS := $(shell go run buildscripts/gen-ldflags.go)
 
+GOOS := $(shell go env GOOS)
+GOOSALT := $(shell if [ ${GOOS} == 'darwin' ]; then echo 'mac'; else echo ${GOOS}; fi;)
+
 TAG ?= $(USER)
 BUILD_LDFLAGS := '$(LDFLAGS)'
 
@@ -14,8 +17,8 @@ checks:
 getdeps:
 	@mkdir -p ${GOPATH}/bin
 	@which golint 1>/dev/null || (echo "Installing golint" && go get -u golang.org/x/lint/golint)
-	@which staticcheck 1>/dev/null || (echo "Installing staticcheck" && wget --quiet -O ${GOPATH}/bin/staticcheck https://github.com/dominikh/go-tools/releases/download/2019.1/staticcheck_linux_amd64 && chmod +x ${GOPATH}/bin/staticcheck)
-	@which misspell 1>/dev/null || (echo "Installing misspell" && wget --quiet https://github.com/client9/misspell/releases/download/v0.3.4/misspell_0.3.4_linux_64bit.tar.gz && tar xf misspell_0.3.4_linux_64bit.tar.gz && mv misspell ${GOPATH}/bin/misspell && chmod +x ${GOPATH}/bin/misspell && rm -f misspell_0.3.4_linux_64bit.tar.gz)
+	@which staticcheck 1>/dev/null || (echo "Installing staticcheck" && wget --quiet -O ${GOPATH}/bin/staticcheck https://github.com/dominikh/go-tools/releases/download/2019.1/staticcheck_${GOOS}_amd64 && chmod +x ${GOPATH}/bin/staticcheck)
+	@which misspell 1>/dev/null || (echo "Installing misspell" && wget --quiet https://github.com/client9/misspell/releases/download/v0.3.4/misspell_0.3.4_${GOOSALT}_64bit.tar.gz && tar xf misspell_0.3.4_${GOOSALT}_64bit.tar.gz && mv misspell ${GOPATH}/bin/misspell && chmod +x ${GOPATH}/bin/misspell && rm -f misspell_0.3.4_${GOOSALT}_64bit.tar.gz)
 
 crosscompile:
 	@(env bash $(PWD)/buildscripts/cross-compile.sh)

pkg/mountinfo/mountinfo.go

@@ -1,3 +1,5 @@
+// +build linux
+
 /*
  * MinIO Cloud Storage, (C) 2017 MinIO, Inc.
  *

pkg/s3select/select_test.go

@@ -18,12 +18,10 @@ package s3select
 
 import (
 	"bytes"
-	"go/build"
 	"io"
 	"io/ioutil"
 	"net/http"
 	"os"
-	"path"
 	"reflect"
 	"testing"
 )
@@ -174,7 +172,7 @@ func TestParquetInput(t *testing.T) {
 `)
 
 	getReader := func(offset int64, length int64) (io.ReadCloser, error) {
-		testdataFile := path.Join(build.Default.GOPATH, "src/github.com/minio/minio/pkg/s3select/testdata.parquet")
+		testdataFile := "testdata.parquet"
 		file, err := os.Open(testdataFile)
 		if err != nil {
 			return nil, err