Fixes and cleanup to build script

.gitignore

@@ -8,3 +8,4 @@
 /licenseok
 /profile.out
 /coverage.txt
+release/

hack/build-all.bash

@@ -5,37 +5,44 @@
 #
 # This script will build dep and calculate hash for each
 # (DEP_BUILD_PLATFORMS, DEP_BUILD_ARCHS) pair.
-# DEP_BUILD_PLATFORMS="linux" DEP_BUILD_ARCHS="amd64" ./hack/build-all.sh
+# DEP_BUILD_PLATFORMS="linux" DEP_BUILD_ARCHS="amd64" ./hack/build-all.bash
 # can be called to build only for linux-amd64
 
 set -e
 
+DEP_ROOT=$(git rev-parse --show-toplevel)
 VERSION=$(git describe --tags --dirty)
 COMMIT_HASH=$(git rev-parse --short HEAD 2>/dev/null)
 DATE=$(date "+%Y-%m-%d")
 
-GO_BUILD_CMD="go build -a -installsuffix cgo"
-GO_BUILD_LDFLAGS="-s -w -X main.commitHash=$COMMIT_HASH -X main.buildDate=$DATE -X main.version=$VERSION"
+if [[ "$(pwd)" != "${DEP_ROOT}" ]]; then
+  echo "you are not in the root of the repo" 1>&2
+  echo "please cd to ${DEP_ROOT} before running this script" 1>&2
+  exit 1
+fi
 
-if [ -z "$DEP_BUILD_PLATFORMS" ]; then
+GO_BUILD_CMD="go build -a -installsuffix cgo"
+GO_BUILD_LDFLAGS="-s -w -X main.commitHash=${COMMIT_HASH} -X main.buildDate=${DATE} -X main.version=${VERSION}"
+
+if [[ -z "${DEP_BUILD_PLATFORMS}" ]]; then
     DEP_BUILD_PLATFORMS="linux windows darwin freebsd"
 fi
 
-if [ -z "$DEP_BUILD_ARCHS" ]; then
+if [[ -z "${DEP_BUILD_ARCHS}" ]]; then
     DEP_BUILD_ARCHS="amd64 386"
 fi
 
-mkdir -p release
+mkdir -p "${DEP_ROOT}/release"
 
 for OS in ${DEP_BUILD_PLATFORMS[@]}; do
   for ARCH in ${DEP_BUILD_ARCHS[@]}; do
-    NAME="dep-$OS-$ARCH"
-    if [ "$OS" == "windows" ]; then
-      NAME="$NAME.exe"
+    NAME="dep-${OS}-${ARCH}"
+    if [[ "${OS}" == "windows" ]]; then
+      NAME="${NAME}.exe"
     fi
-    echo "Building for $OS/$ARCH"
-    GOARCH=$ARCH GOOS=$OS CGO_ENABLED=0 $GO_BUILD_CMD -ldflags "$GO_BUILD_LDFLAGS"\
-     -o "release/$NAME" ./cmd/dep/
-    shasum -a 256 "release/$NAME" > "release/$NAME".sha256
+    echo "Building for ${OS}/${ARCH}"
+    GOARCH=${ARCH} GOOS=${OS} CGO_ENABLED=0 ${GO_BUILD_CMD} -ldflags "${GO_BUILD_LDFLAGS}"\
+     -o "${DEP_ROOT}/release/${NAME}" ./cmd/dep/
+    shasum -a 256 "${DEP_ROOT}/release/${NAME}" > "${DEP_ROOT}/release/${NAME}".sha256
   done
 done