Upgrade to using golang 1.12.15

.circleci/config/config.yml

@@ -21,7 +21,7 @@ executors:
   go:
     working_directory: /go/src/github.com/hashicorp/nomad
     docker:
-      - image: golang:1.12.13
+      - image: golang:1.12.15
     environment:
       <<: *common_envs
       GOPATH: /go
@@ -33,7 +33,7 @@ executors:
     environment: &machine_env
       <<: *common_envs
       GOPATH: /home/circleci/go
-      GOLANG_VERSION: "1.12.13"
+      GOLANG_VERSION: 1.12.15
 
   # uses a more recent image with unattended upgrades disabled properly
   # but seems to break docker builds

README.md

@@ -138,7 +138,7 @@ Who Uses Nomad
 Contributing to Nomad
 --------------------
 
-If you wish to contribute to Nomad, you will  need [Go](https://www.golang.org) installed on your machine (version 1.12.13+ is *required*, and `gcc-go` is not supported).
+If you wish to contribute to Nomad, you will  need [Go](https://www.golang.org) installed on your machine (version 1.12.15+ is *required*, and `gcc-go` is not supported).
 
 See the [`contributing`](contributing/) directory for more developer documentation.
 

appveyor.yml

@@ -23,10 +23,10 @@ install:
       cd %APPVEYOR_BUILD_FOLDER%
       rmdir /Q/S C:\go
 
-  # install go 1.12.13 to match version used for cutting a release
+  # install the go version used for cutting a release
   - cmd: |
       mkdir c:\go
-      appveyor DownloadFile "https://dl.google.com/go/go1.12.13.windows-amd64.zip" -FileName "%TEMP%\\go.zip"
+      appveyor DownloadFile "https://dl.google.com/go/go1.12.15.windows-amd64.zip" -FileName "%TEMP%\\go.zip"
 
   - ps: Expand-Archive $Env:TEMP\go.zip -DestinationPath C:\
 

scripts/release/mac-remote-build

@@ -56,7 +56,7 @@ REPO_PATH="${TMP_WORKSPACE}/gopath/src/github.com/hashicorp/nomad"
 mkdir -p "${TMP_WORKSPACE}/tmp"
 
 install_go() {
-  local go_version="1.12.13"
+  local go_version="1.12.15"
   local download=
 
   download="https://storage.googleapis.com/golang/go${go_version}.darwin-amd64.tar.gz"

scripts/update_golang_version.sh

@@ -0,0 +1,30 @@
+#!/bin/sh
+
+golang_version="$1"
+
+current_version=$(grep -o -e 'golang:[.0-9]*' .circleci/config.yml | head -n1 | cut -d: -f2)
+
+# To support both GNU and BSD sed, the regex is looser than it needs to be.
+# Specifically, we use "* instead of "?, which relies on GNU extension without much loss of
+# correctness in practice.
+sed -i'' -e "s|golang:[.0-9]*|golang:${golang_version}|g" \
+       	.circleci/config/config.yml .circleci/config.yml
+sed -i'' -e "s|GOLANG_VERSION:[ \"]*[.0-9]*\"*|GOLANG_VERSION: ${golang_version}|g" \
+	.circleci/config/config.yml .circleci/config.yml
+
+sed -i'' -e "s|\\(golang.org.*version\\) [.0-9]*|\\1 ${golang_version}|g" \
+	README.md
+
+sed -i'' -e "s|go[.0-9]*.windows-amd64.zip|go${golang_version}.windows-amd64.zip|g" \
+	appveyor.yml
+
+sed -i'' -e "s|go_version=\"*[^\"]*\"*$|go_version=\"${golang_version}\"|g" \
+	scripts/vagrant-linux-priv-go.sh scripts/release/mac-remote-build
+
+# check if there is any remaining references to old versions
+if git grep -I --fixed-strings "${current_version}" | grep -v -e CHANGELOG.md -e vendor/
+then
+	echo "  ^^ files contain references to old golang version" >&2
+	echo "  update script and run again" >&2
+	exit 1
+fi

scripts/vagrant-linux-priv-go.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 function install_go() {
-	local go_version=1.12.13
+	local go_version="1.12.15"
 	local download=
 
 	download="https://storage.googleapis.com/golang/go${go_version}.linux-amd64.tar.gz"