chore(tools): break tools out into a separate module (#2140)

This change breaks the tools out into a separate module so that we can
continue using go modules for pinning go-based dependencies, but to
avoid having these modules become part of our external dependencies.

The `gotool.sh` script is added to make it easy to run modules within
the tool directory while ensuring the scripts still get executed in the
current directory rather than inside of the tools directory.

Author: jsternberg

.circleci/config.yml

@@ -107,14 +107,14 @@ jobs:
       - run:
           name: Generate changelog
           command: |
-            go run github.com/influxdata/changelog generate
+            ./gotool.sh github.com/influxdata/changelog generate
                 --version $CIRCLE_TAG
                 --commit-url https://github.com/influxdata/flux/commit
                 -o release-notes.txt
       - run:
           name: Perform release
           command: |
-            go run github.com/goreleaser/goreleaser release
+            ./gotool.sh github.com/goreleaser/goreleaser release
                 --rm-dist --release-notes release-notes.txt
 
 workflows:

Makefile

@@ -133,7 +133,7 @@ checkgenerate:
 
 staticcheck:
 	GO111MODULE=on go mod vendor # staticcheck looks in vendor for dependencies.
-	GO111MODULE=on go run honnef.co/go/tools/cmd/staticcheck ./...
+	GO111MODULE=on ./gotool.sh honnef.co/go/tools/cmd/staticcheck ./...
 
 test: test-go test-rust
 

go.mod

@@ -15,12 +15,14 @@ require (
 	github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db // indirect
 	github.com/google/flatbuffers v1.11.0
 	github.com/google/go-cmp v0.3.0
-	github.com/goreleaser/goreleaser v0.94.0
-	github.com/influxdata/changelog v1.1.0
+	github.com/inconshreveable/mousetrap v1.0.0 // indirect
 	github.com/influxdata/line-protocol v0.0.0-20180522152040-32c6aa80de5e
 	github.com/influxdata/promql/v2 v2.12.0
 	github.com/influxdata/tdigest v0.0.0-20181121200506-bf2b5ad3c0a9
+	github.com/kr/pretty v0.1.0 // indirect
 	github.com/lib/pq v1.0.0
+	github.com/mattn/go-colorable v0.0.9 // indirect
+	github.com/mattn/go-isatty v0.0.4 // indirect
 	github.com/mattn/go-runewidth v0.0.3 // indirect
 	github.com/mattn/go-sqlite3 v1.11.0
 	github.com/mattn/go-tty v0.0.0-20180907095812-13ff1204f104 // indirect
@@ -33,7 +35,9 @@ require (
 	github.com/prometheus/common v0.6.0
 	github.com/satori/go.uuid v1.2.0
 	github.com/segmentio/kafka-go v0.1.0
+	github.com/sergi/go-diff v1.0.0 // indirect
 	github.com/spf13/cobra v0.0.3
+	github.com/spf13/pflag v1.0.3 // indirect
 	go.uber.org/atomic v1.3.2 // indirect
 	go.uber.org/multierr v1.1.0 // indirect
 	go.uber.org/zap v1.9.1
@@ -42,5 +46,5 @@ require (
 	golang.org/x/tools v0.0.0-20190628153133-6cdbf07be9d0
 	gonum.org/v1/gonum v0.0.0-20181121035319-3f7ecaa7e8ca
 	google.golang.org/api v0.7.0
-	honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a
+	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
 )

go.sum

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+# This script will execute a module in the internal/tools
+# directory and execute it within the current working directory.
+#
+# The script will create an exec script that contains the current
+# working directory. This script gets passed as the -exec argument
+# to go run so it is used for executing the compiled go binary.
+# It then changes into the tool directory so it can use the module
+# dependencies in the tool module.
+#
+# This allows us to specify tool dependencies using go modules without
+# it getting added to the flux module itself.
+
+if [ "$#" -eq 0 ]; then
+  echo "gotool.sh requires one or more arguments" 1>&2
+  exit 1
+fi
+
+tool_dir=$(go list -m -f '{{.Dir}}')/internal/tools
+script_file=$(mktemp)
+trap '{ rm -f "$script_file"; }' EXIT
+
+cat > "$script_file" <<EOF
+#!/bin/bash
+cd "$PWD" && exec "\$@"
+EOF
+chmod 700 "$script_file"
+
+cd "$tool_dir" && go run -exec "$script_file" "$@"

gotool.sh

@@ -0,0 +1,18 @@
+module github.com/influxdata/flux/internal/tools
+
+go 1.12
+
+require (
+	github.com/BurntSushi/toml v0.3.1 // indirect
+	github.com/golang/protobuf v1.3.2 // indirect
+	github.com/google/go-cmp v0.3.0 // indirect
+	github.com/goreleaser/goreleaser v0.94.0
+	github.com/influxdata/changelog v1.1.0
+	github.com/stretchr/testify v1.4.0 // indirect
+	golang.org/x/net v0.0.0-20190620200207-3b0461eec859 // indirect
+	golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45 // indirect
+	golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0 // indirect
+	golang.org/x/tools v0.0.0-20190628153133-6cdbf07be9d0 // indirect
+	google.golang.org/appengine v1.6.1 // indirect
+	honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a
+)

internal/tools/go.mod

@@ -0,0 +1,159 @@
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internal/tools/go.sum

@@ -0,0 +1,13 @@
+package tools
+
+import (
+	_ "github.com/goreleaser/goreleaser"
+	_ "github.com/influxdata/changelog"
+	_ "honnef.co/go/tools/cmd/staticcheck"
+)
+
+// This package specifies the list of go tool dependencies that we rely on.
+// Specifying these paths here ensures that they stay in the go.mod file and
+// allow us to use go run to execute them which allows us to ensure that these
+// tools use a consistent version rather than whatever is on the developer's
+// machine.

internal/tools/tools.go

@@ -6,13 +6,13 @@ cd $DIR
 set -e
 
 remote=$(git rev-parse "@{u}") # "@{u}" gets the current upstream branch
-local=$(git rev-parse @) # '@' gets the current local branch 
+local=$(git rev-parse @) # '@' gets the current local branch
 
-# check if local commit syncs with remote 
+# check if local commit syncs with remote
 if [ "$remote" != "$local" ]; then
     echo "Error: local commit does not match remote. Exiting release script."
     exit 1
-fi 
+fi
 
 # remove any excess brackets, space/tab characters and 'origin' branch and sort the tags
 git_remote_tags () { git ls-remote --tags origin | grep -v '{}' | sort | tr -d [[:blank:]] ; }
@@ -25,7 +25,7 @@ if ! diff -q <(git_remote_tags) <(git_local_tags) &>/dev/null; then
 fi
 
 # cut the next Flux release
-version=$(go run github.com/influxdata/changelog nextver)
+version=$(./gotool.sh github.com/influxdata/changelog nextver)
 git tag -s -m "Release $version" "$version"
 git push origin "$version"