98 lines
2.5 KiB
Go
98 lines
2.5 KiB
Go
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package getter
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import (
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"fmt"
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"path/filepath"
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"github.com/hashicorp/go-getter/helper/url"
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)
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// Detector defines the interface that an invalid URL or a URL with a blank
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// scheme is passed through in order to determine if its shorthand for
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// something else well-known.
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type Detector interface {
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// Detect will detect whether the string matches a known pattern to
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// turn it into a proper URL.
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Detect(string, string) (string, bool, error)
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}
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// Detectors is the list of detectors that are tried on an invalid URL.
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// This is also the order they're tried (index 0 is first).
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var Detectors []Detector
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func init() {
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Detectors = []Detector{
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new(GitHubDetector),
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new(BitBucketDetector),
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new(S3Detector),
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new(FileDetector),
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}
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}
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// Detect turns a source string into another source string if it is
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// detected to be of a known pattern.
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//
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// The third parameter should be the list of detectors to use in the
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// order to try them. If you don't want to configure this, just use
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// the global Detectors variable.
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//
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// This is safe to be called with an already valid source string: Detect
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// will just return it.
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func Detect(src string, pwd string, ds []Detector) (string, error) {
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getForce, getSrc := getForcedGetter(src)
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// Separate out the subdir if there is one, we don't pass that to detect
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getSrc, subDir := SourceDirSubdir(getSrc)
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u, err := url.Parse(getSrc)
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if err == nil && u.Scheme != "" {
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// Valid URL
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return src, nil
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}
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for _, d := range ds {
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result, ok, err := d.Detect(getSrc, pwd)
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if err != nil {
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return "", err
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}
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if !ok {
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continue
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}
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var detectForce string
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detectForce, result = getForcedGetter(result)
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result, detectSubdir := SourceDirSubdir(result)
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// If we have a subdir from the detection, then prepend it to our
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// requested subdir.
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if detectSubdir != "" {
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if subDir != "" {
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subDir = filepath.Join(detectSubdir, subDir)
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} else {
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subDir = detectSubdir
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}
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}
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if subDir != "" {
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u, err := url.Parse(result)
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if err != nil {
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return "", fmt.Errorf("Error parsing URL: %s", err)
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}
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u.Path += "//" + subDir
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result = u.String()
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}
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// Preserve the forced getter if it exists. We try to use the
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// original set force first, followed by any force set by the
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// detector.
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if getForce != "" {
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result = fmt.Sprintf("%s::%s", getForce, result)
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} else if detectForce != "" {
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result = fmt.Sprintf("%s::%s", detectForce, result)
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}
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return result, nil
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}
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return "", fmt.Errorf("invalid source string: %s", src)
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}
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