templates: Add `fileStat` function (#5497)

* Add isDir template function * Update modules/caddyhttp/templates/tplcontext.go Co-authored-by: Mohammed Al Sahaf <msaa1990@gmail.com> * Fix funcIsDir return value on error * Fix funcIsDir return false when root file system not specified * Add stat function, remove isDir function * Remove isDir function (really) * Rename stat to fileStat --------- Co-authored-by: Mohammed Al Sahaf <msaa1990@gmail.com>

Stéphane Mourey committed Apr 24, 2023 at 18:36 UTC 2943c41884278ec5fc44bcb55d2b9b088838cdc2

1 file changed +17

modules/caddyhttp/templates/tplcontext.go

+17

@@ -18,6 +18,7 @@ import (

18 "bytes"

19 "fmt"

20 "io"

21 + "io/fs"

22 "net"

23 "net/http"

24 "os"

@@ -79,6 +80,7 @@ func (c *TemplateContext) NewTemplate(tplName string) *template.Template {

80 "markdown": c.funcMarkdown,

81 "splitFrontMatter": c.funcSplitFrontMatter,

82 "listFiles": c.funcListFiles,

83 + "fileStat": c.funcFileStat,

84 "env": c.funcEnv,

85 "placeholder": c.funcPlaceholder,

86 "fileExists": c.funcFileExists,

@@ -395,6 +397,21 @@ func (c TemplateContext) funcFileExists(filename string) (bool, error) {

397 return false, nil

398 }

399

400 +// funcStat returns Stat of a filename

401 +func (c TemplateContext) funcFileStat(filename string) (fs.FileInfo, error) {

402 + if c.Root == nil {

403 + return nil, fmt.Errorf("root file system not specified")

404 + }

405 +

406 + file, err := c.Root.Open(path.Clean(filename))

407 + if err != nil {

408 + return nil, err

409 + }

410 + defer file.Close()

411 +

412 + return file.Stat()

413 +}

414 +

415 // funcHTTPError returns a structured HTTP handler error. EXPERIMENTAL; SUBJECT TO CHANGE.

416 // Example usage: `{{if not (fileExists $includeFile)}}{{httpError 404}}{{end}}`

417 func (c TemplateContext) funcHTTPError(statusCode int) (bool, error) {