[hugo] Fix build (#5538)

projects/hugo/Dockerfile

@@ -16,7 +16,6 @@
 
 FROM gcr.io/oss-fuzz-base/base-builder
 
-ENV GO111MODULE on
 RUN git clone https://github.com/gohugoio/hugo
-COPY build.sh $SRC/
+COPY build.sh fuzz.go $SRC/
 WORKDIR $SRC/hugo

projects/hugo/build.sh

@@ -15,5 +15,6 @@
 #
 ################################################################################
 
+mv $SRC/fuzz.go $SRC/hugo/tpl/transform/
 
 compile_go_fuzzer github.com/gohugoio/hugo/tpl/transform FuzzMarkdownify fuzzmarkdownify

projects/hugo/fuzz.go

@@ -0,0 +1,61 @@
+// +build gofuzz
+
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package transform
+
+import (
+	"github.com/gohugoio/hugo/common/loggers"
+	"github.com/gohugoio/hugo/config"
+	"github.com/gohugoio/hugo/deps"
+	"github.com/gohugoio/hugo/helpers"
+	"github.com/gohugoio/hugo/hugofs"
+	"github.com/gohugoio/hugo/langs"
+	"github.com/spf13/afero"
+	"github.com/spf13/viper"
+)
+
+func newFuzzDeps(cfg config.Provider) *deps.Deps {
+	cfg.Set("contentDir", "content")
+	cfg.Set("i18nDir", "i18n")
+
+	l := langs.NewLanguage("en", cfg)
+
+	cs, _ := helpers.NewContentSpec(l, loggers.NewErrorLogger(), afero.NewMemMapFs())
+
+	return &deps.Deps{
+		Cfg:         cfg,
+		Fs:          hugofs.NewMem(l),
+		ContentSpec: cs,
+	}
+}
+
+func FuzzMarkdownify(data []byte) int {
+	v := viper.New()
+	v.Set("contentDir", "content")
+	ns := New(newFuzzDeps(v))
+
+	for _, test := range []struct {
+		s interface{}
+	}{
+		{string(data)},
+	} {
+		_, err := ns.Markdownify(test.s)
+		if err != nil {
+			return 0
+		}
+	}
+	return 1
+}