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helm/pkg/lint/template.go

64 lines
1.4 KiB

package lint
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"text/template"
"github.com/Masterminds/sprig"
)
func Templates(basepath string) (messages []Message) {
messages = []Message{}
path := filepath.Join(basepath, "templates")
if fi, err := os.Stat(path); err != nil {
messages = append(messages, Message{Severity: WarningSev, Text: "No templates"})
return
} else if !fi.IsDir() {
messages = append(messages, Message{Severity: ErrorSev, Text: "'templates' is not a directory"})
return
}
tpl := template.New("tpl").Funcs(sprig.TxtFuncMap())
err := filepath.Walk(basepath, func(name string, fi os.FileInfo, e error) error {
// If an error is returned, we fail. Non-fatal errors should just be
// added directly to messages.
if e != nil {
return e
}
if fi.IsDir() {
return nil
}
data, err := ioutil.ReadFile(name)
if err != nil {
messages = append(messages, Message{
Severity: ErrorSev,
Text: fmt.Sprintf("cannot read %s: %s", name, err),
})
return nil
}
// An error rendering a file should emit a warning.
newtpl, err := tpl.Parse(string(data))
if err != nil {
messages = append(messages, Message{
Severity: ErrorSev,
Text: fmt.Sprintf("error processing %s: %s", name, err),
})
return nil
}
tpl = newtpl
return nil
})
if err != nil {
messages = append(messages, Message{Severity: ErrorSev, Text: err.Error()})
}
return
}