use go 1.12

Signed-off-by: hongming <talonwan@yunify.com>

vendor/github.com/mholt/caddy/caddyhttp/markdown/process.go

@@ -0,0 +1,106 @@
+// Copyright 2015 Light Code Labs, 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 markdown
+
+import (
+	"io"
+	"io/ioutil"
+	"os"
+
+	"github.com/mholt/caddy/caddyhttp/httpserver"
+	"github.com/mholt/caddy/caddyhttp/markdown/metadata"
+	"github.com/mholt/caddy/caddyhttp/markdown/summary"
+	"github.com/russross/blackfriday"
+)
+
+// FileInfo represents a file in a particular server context. It wraps the os.FileInfo struct.
+type FileInfo struct {
+	os.FileInfo
+	ctx httpserver.Context
+}
+
+var recognizedMetaTags = []string{
+	"author",
+	"copyright",
+	"description",
+	"subject",
+}
+
+// Summarize returns an abbreviated string representation of the markdown stored in this file.
+// wordcount is the number of words returned in the summary.
+func (f FileInfo) Summarize(wordcount int) (string, error) {
+	fp, err := f.ctx.Root.Open(f.Name())
+	if err != nil {
+		return "", err
+	}
+	defer fp.Close()
+
+	buf, err := ioutil.ReadAll(fp)
+	if err != nil {
+		return "", err
+	}
+
+	return string(summary.Markdown(buf, wordcount)), nil
+}
+
+// Markdown processes the contents of a page in b. It parses the metadata
+// (if any) and uses the template (if found).
+func (c *Config) Markdown(title string, r io.Reader, dirents []os.FileInfo, ctx httpserver.Context) ([]byte, error) {
+	body, err := ioutil.ReadAll(r)
+	if err != nil {
+		return nil, err
+	}
+
+	parser := metadata.GetParser(body)
+	markdown := parser.Markdown()
+	mdata := parser.Metadata()
+
+	// process markdown
+	extns := 0
+	extns |= blackfriday.EXTENSION_TABLES
+	extns |= blackfriday.EXTENSION_FENCED_CODE
+	extns |= blackfriday.EXTENSION_STRIKETHROUGH
+	extns |= blackfriday.EXTENSION_DEFINITION_LISTS
+	html := blackfriday.Markdown(markdown, c.Renderer, extns)
+
+	// set it as body for template
+	mdata.Variables["body"] = string(html)
+
+	// fixup title
+	mdata.Variables["title"] = mdata.Title
+	if mdata.Variables["title"] == "" {
+		mdata.Variables["title"] = title
+	}
+
+	// move available and valid front matters to the meta values
+	meta := make(map[string]string)
+	for _, val := range recognizedMetaTags {
+		if mVal, ok := mdata.Variables[val]; ok {
+			meta[val] = mVal.(string)
+		}
+	}
+
+	// massage possible files
+	files := []FileInfo{}
+	for _, ent := range dirents {
+		file := FileInfo{
+			FileInfo: ent,
+			ctx:      ctx,
+		}
+		files = append(files, file)
+	}
+
+	return execTemplate(c, mdata, meta, files, ctx)
+}