build: Add spelling checks and check if curl is installed.

Makefile

@@ -26,6 +26,7 @@ getdeps: checkdeps checkgopath
 	@go get -u golang.org/x/tools/cmd/vet && echo "Installed vet:"
 	@go get -u github.com/fzipp/gocyclo && echo "Installed gocyclo:"
 	@go get -u github.com/remyoudompheng/go-misc/deadcode && echo "Installed deadcode:"
+	@go get -u github.com/client9/misspell/cmd/misspell && echo "Installed misspell:"
 
 $(UI_ASSETS):
 	@curl -s https://dl.minio.io/assets/server/$(UI_ASSETS_ARMOR) 2>&1 > $(UI_ASSETS_ARMOR) && echo "Downloading signature file $(UI_ASSETS_ARMOR) for verification:"
@@ -33,7 +34,7 @@ $(UI_ASSETS):
 	@curl -s https://dl.minio.io/assets/server/$@ 2>&1 > $@ && echo "Downloading UI assets file $@:"
 	@gpg --batch --no-tty --verify $(UI_ASSETS_ARMOR) $@ 2>&1 > /dev/null && echo "Verifying signature of downloaded assets."
 
-verifiers: getdeps vet fmt lint cyclo
+verifiers: getdeps vet fmt lint cyclo spelling
 
 vet:
 	@echo "Running $@:"
@@ -61,7 +62,11 @@ build: getdeps verifiers $(UI_ASSETS)
 	@echo "Installing minio:"
 
 deadcode:
-	@GO15VENDOREXPERIMENT=1 deadcode
+	@GO15VENDOREXPERIMENT=1 ${GOPATH}/bin/deadcode
+
+spelling:
+	@GO15VENDOREXPERIMENT=1 ${GOPATH}/bin/misspell *.go
+	@GO15VENDOREXPERIMENT=1 ${GOPATH}/bin/misspell pkg/**/*
 
 test: build
 	@echo "Running all testing:"
@@ -72,13 +77,13 @@ gomake-all: build
 	@GO15VENDOREXPERIMENT=1 go build --ldflags $(BUILD_LDFLAGS) -o $(GOPATH)/bin/minio
 
 pkg-add:
-	@GO15VENDOREXPERIMENT=1 govendor add $(PKG)
+	@GO15VENDOREXPERIMENT=1 ${GOPATH}/bin/govendor add $(PKG)
 
 pkg-update:
-	@GO15VENDOREXPERIMENT=1 govendor update $(PKG)
+	@GO15VENDOREXPERIMENT=1 ${GOPATH}/bin/govendor update $(PKG)
 
 pkg-remove:
-	@GO15VENDOREXPERIMENT=1 govendor remove $(PKG)
+	@GO15VENDOREXPERIMENT=1 ${GOPATH}/bin/govendor remove $(PKG)
 
 install: gomake-all
 

buildscripts/checkdeps.sh

@@ -21,6 +21,7 @@ _init() {
 
     ## Minimum required versions for build dependencies
     GIT_VERSION="1.0"
+    CURL_VERSION="7.12.0"
     GPG_VERSION="1.3"
     GO_VERSION="1.5.1"
     OSX_VERSION="10.8"
@@ -186,6 +187,11 @@ check_deps() {
     if [ $? -ge 2 ]; then
         MISSING="${MISSING} gpg"
     fi
+
+    check_version "$(env curl --version 2>/dev/null | sed -e 's/^.* \([0-9.\].*\).*$/\1/' -e 's/^\([0-9.\]*\).*/\1/g' | head -1)" "${CURL_VERSION}"
+    if [ $? -ge 2 ]; then
+        MISSING="${MISSING} curl"
+    fi
 }
 
 main() {