io.github.oliviercailloux.git.common.GitUrlKind Maven / Gradle / Ivy

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package io.github.oliviercailloux.git.common;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Verify.verify;

import com.google.common.primitives.Booleans;
import java.util.regex.Pattern;

public enum GitUrlKind {
  SCHEME, SCP, ABSOLUTE_PATH, RELATIVE_PATH;

  private static final Pattern SCHEME_PATTERN =
      Pattern.compile("((ssh|git|https?|ftps?)://[^/]+/.*)|(file:///.*)");
  private static final Pattern SCP_PATTERN = Pattern.compile("[^/:]+:/?([^/].*)?");
  private static final Pattern ABSOLUTE_PATH_PATTERN = Pattern.compile("/.*");
  private static final Pattern RELATIVE_PATH_PATTERN =
      Pattern.compile("[^/:](([^/:]*/[^:]*:.*)|[^:]*)");

  public static GitUrlKind given(String gitUrl) {
    checkArgument(!gitUrl.isEmpty());
    final boolean scheme = SCHEME_PATTERN.asMatchPredicate().test(gitUrl);
    final boolean scp = SCP_PATTERN.asMatchPredicate().test(gitUrl);
    final boolean absolutePath = ABSOLUTE_PATH_PATTERN.asMatchPredicate().test(gitUrl);
    final boolean relativePath = RELATIVE_PATH_PATTERN.asMatchPredicate().test(gitUrl);
    final int match = Booleans.countTrue(scheme, scp, absolutePath, relativePath);
    verify(match <= 1,
        String.format("Match: %b, %b, %b, %b.", scheme, scp, absolutePath, relativePath));
    checkArgument(match == 1);
    return scheme ? SCHEME : (scp ? SCP : (absolutePath ? ABSOLUTE_PATH : RELATIVE_PATH));
  }
}