ci: add go mod tidy checker (#963)

.github/workflows/misc.yml

@@ -54,3 +54,21 @@ jobs:
           else
             echo 'Succeeded.'
           fi
+  modtidy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: 1.20.x
+
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Check go.mods
+        run: |
+          sums="$(sha256sum go.mod misc/devdeps/go.mod)"
+          for path in . ./misc/devdeps; do
+            env -C $path go mod tidy -v || exit 1
+          done
+          echo "$sums" | sha256sum -c

go.mod

@@ -41,15 +41,13 @@ require (
 )
 
 require (
-	github.com/awalterschulze/gographviz v2.0.3+incompatible // indirect
 	github.com/cespare/xxhash v1.1.0 // indirect
 	github.com/cespare/xxhash/v2 v2.1.1 // indirect
 	github.com/dgraph-io/ristretto v0.1.1 // indirect
 	github.com/dustin/go-humanize v1.0.0 // indirect
 	github.com/facebookgo/ensure v0.0.0-20200202191622-63f1cf65ac4c // indirect
 	github.com/facebookgo/stack v0.0.0-20160209184415-751773369052 // indirect
 	github.com/facebookgo/subset v0.0.0-20200203212716-c811ad88dec4 // indirect
-	github.com/fatih/color v1.15.0 // indirect
 	github.com/gdamore/encoding v1.0.0 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b // indirect
@@ -58,16 +56,12 @@ require (
 	github.com/google/flatbuffers v1.12.1 // indirect
 	github.com/gorilla/securecookie v1.1.1 // indirect
 	github.com/gorilla/sessions v1.2.1 // indirect
-	github.com/jessevdk/go-flags v1.4.0 // indirect
 	github.com/klauspost/compress v1.12.3 // indirect
 	github.com/kr/text v0.2.0 // indirect
 	github.com/lib/pq v1.10.7 // indirect
 	github.com/lucasb-eyer/go-colorful v1.0.3 // indirect
-	github.com/mattn/go-colorable v0.1.13 // indirect
-	github.com/mattn/go-isatty v0.0.17 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/rivo/uniseg v0.2.0 // indirect
-	github.com/uber/go-torch v0.0.0-20181107071353-86f327cc820e // indirect
 	go.opencensus.io v0.22.5 // indirect
 	go.uber.org/atomic v1.7.0 // indirect
 	golang.org/x/sys v0.9.0 // indirect