telemetry: Normalize git URLs

Normalize `https://github.com/dagger/dagger` and
`git@github.com:dagger/dagger.git` to `github.com/dagger/dagger`

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

telemetry/git.go

@@ -0,0 +1,65 @@
+package telemetry
+
+import (
+	"fmt"
+	"net/url"
+	"regexp"
+	"strings"
+)
+
+var (
+	urlSchemeRegExp  = regexp.MustCompile(`^[^:]+://`)
+	scpLikeURLRegExp = regexp.MustCompile(`^(?:(?P<user>[^@]+)@)?(?P<host>[^:\s]+):(?:(?P<port>[0-9]{1,5})(?:\/|:))?(?P<path>[^\\].*\/[^\\].*)$`)
+)
+
+func parseGitURL(endpoint string) (string, error) {
+	if e, ok := parseSCPLike(endpoint); ok {
+		return e, nil
+	}
+
+	return parseURL(endpoint)
+}
+
+func parseURL(endpoint string) (string, error) {
+	u, err := url.Parse(endpoint)
+	if err != nil {
+		return "", err
+	}
+
+	if !u.IsAbs() {
+		return "", fmt.Errorf(
+			"invalid endpoint: %s", endpoint,
+		)
+	}
+
+	return fmt.Sprintf("%s%s", u.Hostname(), u.Path), nil
+}
+
+func parseSCPLike(endpoint string) (string, bool) {
+	if matchesURLScheme(endpoint) || !matchesScpLike(endpoint) {
+		return "", false
+	}
+
+	_, host, _, path := findScpLikeComponents(endpoint)
+
+	return fmt.Sprintf("%s/%s", host, strings.TrimSuffix(path, ".git")), true
+}
+
+// matchesURLScheme returns true if the given string matches a URL-like
+// format scheme.
+func matchesURLScheme(url string) bool {
+	return urlSchemeRegExp.MatchString(url)
+}
+
+// matchesScpLike returns true if the given string matches an SCP-like
+// format scheme.
+func matchesScpLike(url string) bool {
+	return scpLikeURLRegExp.MatchString(url)
+}
+
+// findScpLikeComponents returns the user, host, port and path of the
+// given SCP-like URL.
+func findScpLikeComponents(url string) (user, host, port, path string) {
+	m := scpLikeURLRegExp.FindStringSubmatch(url)
+	return m[1], m[2], m[3], m[4]
+}