Go 1.12

Dockerfile

@@ -109,7 +109,7 @@ RUN echo "deb http://ppa.launchpad.net/ondrej/php/ubuntu bionic main" >> /etc/ap
 ### GO
 
 # Install Go and dep
-RUN curl https://dl.google.com/go/go1.11.5.linux-amd64.tar.gz | tar -xz -C /opt \
+RUN curl https://dl.google.com/go/go1.12.5.linux-amd64.tar.gz | tar -xz -C /opt \
     && wget -O /opt/go/bin/dep https://github.com/golang/dep/releases/download/0.5.2/dep-linux-amd64 \
     && chmod +x /opt/go/bin/dep \
     && mkdir /opt/go/gopath

go_modules/lib/dependabot/go_modules/file_updater/go_mod_updater.rb

@@ -68,8 +68,8 @@ def updated_go_sum_content
 
         RESOLVABILITY_ERROR_REGEXES = [
           /go: .*: git fetch .*: exit status 128/.freeze,
-          /go: verifying .*: checksum mismatch/.freeze,
-          /build .*: cannot find module for path/.freeze
+          /verifying .*: checksum mismatch/.freeze,
+          /build .*: cannot find module providing package/.freeze
         ].freeze
         MODULE_PATH_MISMATCH_REGEXES = [
           /go: ([^@\s]+)(?:@[^\s]+)?: .* has non-.* module path "(.*)" at/,

go_modules/spec/dependabot/go_modules/file_updater/go_mod_updater_spec.rb

@@ -78,6 +78,17 @@
 
         it { is_expected.to include(%(rsc.io/quote v1.5.2\n)) }
 
+        context "for a go 1.11 go.mod" do
+          let(:go_mod_body) do
+            fixture("go_mods", go_mod_fixture_name).sub(/go 1.12/, "")
+          end
+          it { is_expected.to_not include("go 1.") }
+        end
+
+        context "for a go 1.12 go.mod" do
+          it { is_expected.to include("go 1.12") }
+        end
+
         context "with a go.sum" do
           let(:go_sum) do
             Dependabot::DependencyFile.new(name: "go.sum", content: go_sum_body)

go_modules/spec/fixtures/go_mods/go.mod

@@ -1,5 +1,7 @@
 module github.com/dependabot/vgotest
 
+go 1.12
+
 require (
 	// The actual repo is fatih/color, but including the capital
 	// helps us test that we preserve caps