Add golint, gocyclo, and gocritic for golang projects (#13)

* Add golint, gocyclo, and gocritic for golang projects

* Fix broken tests

spec/gocritic_spec.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env shellspec
+
+Describe "printVersion()"
+  printVersion() {
+    gocritic version
+  }
+
+  It "validates tool is installed by checking version"
+    When call printVersion
+    The stderr should be present
+    The status should eq 0
+  End
+End

spec/gocyclo_spec.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env shellspec
+
+Describe "printHelp()"
+  printHelp() {
+    gocyclo --help
+  }
+
+  It "validates tool is installed by running it"
+    When call printHelp
+    The stderr should be present
+    The status should eq 2
+  End
+End

spec/golint_spec.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env shellspec
+
+Describe "printHelp()"
+  printHelp() {
+    golint --help
+  }
+
+  It "validates tool is installed by running it"
+    When call printHelp
+    The stderr should be present
+    The status should eq 0
+  End
+End

src/docker/Dockerfile

@@ -292,6 +292,8 @@ RUN asdf plugin-add golang https://github.com/kennyp/asdf-golang.git \
   && asdf install golang "${GO_VERSION}" \
   && asdf global golang "${GO_VERSION}" \
   && rm -rf /var/tmp/* /tmp/* /var/tmp/.???* /tmp/.???*
+ENV GOPATH="/home/anvil/go"
+ENV PATH="${PATH}:${GOPATH}/bin"
 
 # Install golangci-lint. Get versions using asdf list all golangci-lint
 ARG GOLANGCI_LINT_VERSION="1.34.1"
@@ -309,6 +311,18 @@ RUN asdf plugin-add goreleaser https://github.com/kforsthoevel/asdf-goreleaser.g
   && asdf global goreleaser "${GORELEASER_VERSION}" \
   && rm -rf /var/tmp/* /tmp/* /var/tmp/.???* /tmp/.???*
 
+# Install golint. "go get" doesn't really support specifying versions, so we just get the latest
+RUN go get -u golang.org/x/lint/golint \
+  && rm -rf /var/tmp/* /tmp/* /var/tmp/.???* /tmp/.???*
+
+# Install gocyclo. "go get" doesn't really support specifying versions, so we just get the latest
+RUN go get -u github.com/fzipp/gocyclo/cmd/gocyclo \
+  && rm -rf /var/tmp/* /tmp/* /var/tmp/.???* /tmp/.???*
+
+# Install gocritic. "go get" doesn't really support specifying versions, so we just get the latest
+RUN go get -u github.com/go-critic/go-critic/cmd/gocritic \
+  && rm -rf /var/tmp/* /tmp/* /var/tmp/.???* /tmp/.???*
+
 # Support tools installed as anvil when running as root user
 USER root
 ENV ASDF_DATA_DIR="/home/anvil/.asdf"