providers: Add mime provider

providers/all.go

@@ -4,6 +4,7 @@ import "git.tebibyte.media/sashakoshka/step"
 import fpos       "git.tebibyte.media/sashakoshka/step/providers/os"
 import fphttp     "git.tebibyte.media/sashakoshka/step/providers/http"
 import fppath     "git.tebibyte.media/sashakoshka/step/providers/path"
+import fpmime     "git.tebibyte.media/sashakoshka/step/providers/mime"
 import fpslice    "git.tebibyte.media/sashakoshka/step/providers/slice"
 import fpsprig    "git.tebibyte.media/sashakoshka/step/providers/sprig"
 import fpimport   "git.tebibyte.media/sashakoshka/step/providers/import"
@@ -15,6 +16,7 @@ func All () []step.FuncProvider {
 		new(fpos.Provider),
 		new(fphttp.Provider),
 		new(fppath.Provider),
+		new(fpmime.Provider),
 		new(fpslice.Provider),
 		new(fpsprig.Provider),
 		new(fpimport.Provider),

providers/mime/mime.go

@@ -0,0 +1,27 @@
+package slice
+
+import "html/template"
+import "github.com/gabriel-vasile/mimetype"
+import "git.tebibyte.media/sashakoshka/step"
+
+const hiddenPrefix = "."
+
+var _ step.FuncProvider = new(Provider)
+
+// Provider provides MIME functions.
+type Provider struct {
+	
+}
+
+// FuncMap fulfills the step.FuncProvider interface.
+func (this *Provider) FuncMap () template.FuncMap {
+	return template.FuncMap {
+		"fileContentType": funcFileContentType,
+	}
+}
+
+func funcFileContentType (name string) (string, error) {
+	typ, err := mimetype.DetectFile(name)
+	if err != nil { return "", err }
+	return typ.String(), err
+}