install script update

install.sh

@@ -1,13 +1,17 @@
 #!/usr/bin/env bash
 
-if ! go version 2>/dev/null; then
+if ! go version &>/dev/null; then
     echo "Please install Golang and rerun this script"
     exit 1 
 fi
 
 go_version=$(go version | cut -d' ' -f3)
-go_version_major=$(echo ${go_version:2} | cut -d'.' -f1)
-go_version_minor=$(echo ${go_version:2} | cut -d'.' -f2)
+go_version_major=$(echo "${go_version:2}" | cut -d'.' -f1)
+go_version_minor=$(echo "${go_version:2}" | cut -d'.' -f2)
+
+# install_dep.sh installs to /tmp/gopath/bin
+# add it to path just in case
+PATH=/tmp/gopath/bin:$PATH
 
 if [ "$go_version_major" -gt 1 ]; then
     # good to go - future proof ;)
@@ -17,17 +21,17 @@ elif [ "$go_version_major" -eq 1 ] && [ "$go_version_minor" -ge 11 ]; then
     # good to go - we have go modules
     echo "Building & installing ..."
     make install
-elif dep version >/dev/null; then
+elif dep version &>/dev/null; then
     if ! dep init; then
-        echo "`dep init` failed - bootstraping GOPATH ..."
-        export GOPATH=/tmp/gopath
+        echo "\`dep init\` failed - bootstraping GOPATH ..."
+        export GOPATH=$(mktemp /tmp/gopath-XXX)
         project_path=$GOPATH/src/github.com/curusarn/resh
-        mkdir -p $project_path
-        cp -rf . $project_path
-        cd $project_path
+        mkdir -p "$project_path"
+        cp -rf . "$project_path"
+        cd "$project_path"
         if ! dep init; then
-            echo "Unexpected ERROR while running `dep init`!"
-            echo "Try fixing it yourself - I'm sorry :("
+            echo "Unexpected ERROR while running \`dep init\`!"
+            echo "Try running \`make install\`"
             exit 3
         fi
         echo "Succesfuly bootstraped GOPATH"
@@ -35,6 +39,7 @@ elif dep version >/dev/null; then
     echo "Building & installing ..."
     make install
 else
-    echo "Please install dep and rerun this script"
+    echo "Please update your Golang to version >= 1.11 OR install dep and rerun this script"
+    echo "If you have trouble installing dep you can run \`./install_dep.sh\` in this directory"
     exit 2
 fi

install_dep.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+export GOPATH=/tmp/gopath
+mkdir $GOPATH/bin
+curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh