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120 lines
2.8 KiB
120 lines
2.8 KiB
/*
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Copyright The Helm Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package loader
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import (
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"bytes"
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"github.com/pkg/errors"
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"helm.sh/helm/v3/internal/ignore"
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"helm.sh/helm/v3/internal/sympath"
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"helm.sh/helm/v3/pkg/chart"
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)
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var utf8bom = []byte{0xEF, 0xBB, 0xBF}
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// DirLoader loads a chart from a directory
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type DirLoader string
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// Load loads the chart
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func (l DirLoader) Load() (*chart.Chart, error) {
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return LoadDir(string(l))
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}
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// LoadDir loads from a directory.
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//
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// This loads charts only from directories.
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func LoadDir(dir string) (*chart.Chart, error) {
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topdir, err := filepath.Abs(dir)
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if err != nil {
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return nil, err
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}
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// Just used for errors.
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c := &chart.Chart{}
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rules := ignore.Empty()
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ifile := filepath.Join(topdir, ignore.HelmIgnore)
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if _, err := os.Stat(ifile); err == nil {
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r, err := ignore.ParseFile(ifile)
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if err != nil {
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return c, err
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}
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rules = r
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}
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rules.AddDefaults()
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files := []*BufferedFile{}
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topdir += string(filepath.Separator)
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walk := func(name string, fi os.FileInfo, err error) error {
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n := strings.TrimPrefix(name, topdir)
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if n == "" {
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// No need to process top level. Avoid bug with helmignore .* matching
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// empty names. See issue 1779.
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return nil
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}
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// Normalize to / since it will also work on Windows
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n = filepath.ToSlash(n)
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if err != nil {
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return err
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}
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if fi.IsDir() {
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// Directory-based ignore rules should involve skipping the entire
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// contents of that directory.
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if rules.Ignore(n, fi) {
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return filepath.SkipDir
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}
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return nil
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}
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// If a .helmignore file matches, skip this file.
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if rules.Ignore(n, fi) {
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return nil
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}
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// Irregular files include devices, sockets, and other uses of files that
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// are not regular files. In Go they have a file mode type bit set.
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// See https://golang.org/pkg/os/#FileMode for examples.
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if !fi.Mode().IsRegular() {
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return fmt.Errorf("cannot load irregular file %s as it has file mode type bits set", name)
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}
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data, err := os.ReadFile(name)
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if err != nil {
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return errors.Wrapf(err, "error reading %s", n)
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}
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data = bytes.TrimPrefix(data, utf8bom)
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files = append(files, &BufferedFile{Name: n, Data: data})
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return nil
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}
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if err = sympath.Walk(topdir, walk); err != nil {
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return c, err
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}
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return LoadFiles(files)
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}
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