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markdown.go
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markdown.go
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package setup
import (
"net/http"
"path"
"path/filepath"
"strings"
"github.com/mholt/caddy/middleware"
"github.com/mholt/caddy/middleware/markdown"
"github.com/russross/blackfriday"
)
// Markdown configures a new Markdown middleware instance.
func Markdown(c *Controller) (middleware.Middleware, error) {
mdconfigs, err := markdownParse(c)
if err != nil {
return nil, err
}
md := markdown.Markdown{
Root: c.Root,
FileSys: http.Dir(c.Root),
Configs: mdconfigs,
IndexFiles: []string{"index.md"},
}
// Sweep the whole path at startup to at least generate link index, maybe generate static site
c.Startup = append(c.Startup, func() error {
for i := range mdconfigs {
cfg := mdconfigs[i]
// Generate link index and static files (if enabled)
if err := markdown.GenerateStatic(md, cfg); err != nil {
return err
}
// Watch file changes for static site generation if not in development mode.
if !cfg.Development {
markdown.Watch(md, cfg, markdown.DefaultInterval)
}
}
return nil
})
return func(next middleware.Handler) middleware.Handler {
md.Next = next
return md
}, nil
}
func markdownParse(c *Controller) ([]*markdown.Config, error) {
var mdconfigs []*markdown.Config
for c.Next() {
md := &markdown.Config{
Renderer: blackfriday.HtmlRenderer(0, "", ""),
Templates: make(map[string]string),
StaticFiles: make(map[string]string),
}
// Get the path scope
args := c.RemainingArgs()
switch len(args) {
case 0:
md.PathScope = "/"
case 1:
md.PathScope = args[0]
default:
return mdconfigs, c.ArgErr()
}
// Load any other configuration parameters
for c.NextBlock() {
if err := loadParams(c, md); err != nil {
return mdconfigs, err
}
}
// If no extensions were specified, assume some defaults
if len(md.Extensions) == 0 {
md.Extensions = []string{".md", ".markdown", ".mdown"}
}
mdconfigs = append(mdconfigs, md)
}
return mdconfigs, nil
}
func loadParams(c *Controller, mdc *markdown.Config) error {
switch c.Val() {
case "ext":
exts := c.RemainingArgs()
if len(exts) == 0 {
return c.ArgErr()
}
mdc.Extensions = append(mdc.Extensions, exts...)
return nil
case "css":
if !c.NextArg() {
return c.ArgErr()
}
mdc.Styles = append(mdc.Styles, c.Val())
return nil
case "js":
if !c.NextArg() {
return c.ArgErr()
}
mdc.Scripts = append(mdc.Scripts, c.Val())
return nil
case "template":
tArgs := c.RemainingArgs()
switch len(tArgs) {
case 0:
return c.ArgErr()
case 1:
if _, ok := mdc.Templates[markdown.DefaultTemplate]; ok {
return c.Err("only one default template is allowed, use alias.")
}
fpath := filepath.ToSlash(filepath.Clean(c.Root + string(filepath.Separator) + tArgs[0]))
mdc.Templates[markdown.DefaultTemplate] = fpath
return nil
case 2:
fpath := filepath.ToSlash(filepath.Clean(c.Root + string(filepath.Separator) + tArgs[1]))
mdc.Templates[tArgs[0]] = fpath
return nil
default:
return c.ArgErr()
}
case "sitegen":
if c.NextArg() {
mdc.StaticDir = path.Join(c.Root, c.Val())
} else {
mdc.StaticDir = path.Join(c.Root, markdown.DefaultStaticDir)
}
if c.NextArg() {
// only 1 argument allowed
return c.ArgErr()
}
return nil
case "dev":
if c.NextArg() {
mdc.Development = strings.ToLower(c.Val()) == "true"
} else {
mdc.Development = true
}
if c.NextArg() {
// only 1 argument allowed
return c.ArgErr()
}
return nil
default:
return c.Err("Expected valid markdown configuration property")
}
}