-novendor doesn't working properly

[Antonboom]

Hello!

go env

$ go env                                                                              
GO111MODULE="on"
GOARCH="arm64"
GOBIN="/Users/anthony/golang_workspace/bin"
GOCACHE="/Users/anthony/Library/Caches/go-build"
GOENV="/Users/anthony/Library/Application Support/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="arm64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/anthony/golang_workspace/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/anthony/golang_workspace"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_arm64"
GOVCS=""
GOVERSION="go1.18.2"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/Users/anthony/.../go.mod"
GOWORK=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/6t/v80c8sfs5zqf38b2yhzq592h0000gn/T/go-build3004086577=/tmp/go-build -gno-record-gcc-switches -fno-common"

 godepgraph -horizontal  -s -novendor ./internal/config | dot -Tpng -o godepgraph.png

$ ls -l vendor/github.com/            
total 0
drwxr-xr-x   3 anthony  staff   96 Aug 15 12:17 BurntSushi
...
drwxr-xr-x   5 anthony  staff  160 Aug 15 12:17 go-playground
...

Expected Behaviour

No vendored packages in the graph.

[kelzenberg]

Running godepgraph -h, the description for -novendor states

-novendor
ignore packages in the vendor directory

I came across the same problem and reading that, I now believe, that only packages in a vendor directory are being ignored. If true, it's very misleading.

It would be nice to ignore packages based on a regex if excluding external packages is too difficult.