don't stop looking if a plugin is missing

go.mod

@@ -12,6 +12,7 @@ require (
 	github.com/gobuffalo/plush v3.7.32+incompatible
 	github.com/gobuffalo/plushgen v0.0.0-20181207152837-eedb135bd51b
 	github.com/gobuffalo/release v1.1.6
+	github.com/gobuffalo/tags v2.0.15+incompatible // indirect
 	github.com/karrick/godirwalk v1.7.7
 	github.com/markbates/going v1.0.2
 	github.com/markbates/oncer v0.0.0-20181203154359-bf2de49a0be2

go.sum

@@ -182,8 +182,9 @@ github.com/gobuffalo/syncx v0.0.0-20181120191700-98333ab04150/go.mod h1:HhnNqWY9
 github.com/gobuffalo/syncx v0.0.0-20181120194010-558ac7de985f h1:S5EeH1reN93KR0L6TQvkRpu9YggCYXrUqFh1iEgvdC0=
 github.com/gobuffalo/syncx v0.0.0-20181120194010-558ac7de985f/go.mod h1:HhnNqWY95UYwwW3uSASeV7vtgYkT2t16hJgV3AEPUpw=
 github.com/gobuffalo/tags v2.0.11+incompatible/go.mod h1:9XmhOkyaB7UzvuY4UoZO4s67q8/xRMVJEaakauVQYeY=
-github.com/gobuffalo/tags v2.0.14+incompatible h1:RbcLAfomSsAIM+47dnwtAn/DYZyNaXpF72j1P3t6rmw=
 github.com/gobuffalo/tags v2.0.14+incompatible/go.mod h1:9XmhOkyaB7UzvuY4UoZO4s67q8/xRMVJEaakauVQYeY=
+github.com/gobuffalo/tags v2.0.15+incompatible h1:qc5hMXPsXD+zYPSlNgqzlpVW7z/+GJEVCqn245BEUIY=
+github.com/gobuffalo/tags v2.0.15+incompatible/go.mod h1:9XmhOkyaB7UzvuY4UoZO4s67q8/xRMVJEaakauVQYeY=
 github.com/gobuffalo/uuid v2.0.3+incompatible/go.mod h1:ErhIzkRhm0FtRuiE/PeORqcw4cVi1RtSpnwYrxuvkfE=
 github.com/gobuffalo/uuid v2.0.4+incompatible/go.mod h1:ErhIzkRhm0FtRuiE/PeORqcw4cVi1RtSpnwYrxuvkfE=
 github.com/gobuffalo/uuid v2.0.5+incompatible h1:c5uWRuEnYggYCrT9AJm0U2v1QTG7OVDAvxhj8tIV5Gc=

plugins/plugins.go

@@ -15,6 +15,7 @@ import (
 	"github.com/gobuffalo/meta"
 	"github.com/karrick/godirwalk"
 	"github.com/markbates/oncer"
+	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 )
 
@@ -182,7 +183,10 @@ func listPlugDeps(app meta.App) (List, error) {
 		}
 		bin, err := LookPath(bin)
 		if err != nil {
-			return list, err
+			if errors.Cause(err) != ErrPlugMissing {
+				return list, err
+			}
+			continue
 		}
 		commands := askBin(ctx, bin)
 		cancel()