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io.quarkus.docs.generation.CheckCrossReferences Maven / Gradle / Ivy
package io.quarkus.docs.generation;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.TreeMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import com.fasterxml.jackson.core.exc.StreamReadException;
import com.fasterxml.jackson.databind.DatabindException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
import com.fasterxml.jackson.dataformat.yaml.YAMLGenerator;
import io.quarkus.docs.generation.ReferenceIndexGenerator.Index;
/**
* Iterate over the documents in the source directory and check the cross references.
*/
public class CheckCrossReferences {
private static final String SOURCE_BLOCK_PREFIX = "[source";
private static final String SOURCE_BLOCK_DELIMITER = "--";
private static final Pattern XREF_PATTERN = Pattern.compile("xref:([^\\[]+)\\[[^\\]]*\\]");
private static final Pattern ANGLE_BRACKETS_WITHOUT_DESCRIPTION_PATTERN = Pattern.compile("<<([a-z0-9_\\-#\\.]+?)>>",
Pattern.CASE_INSENSITIVE);
private static final Pattern ANGLE_BRACKETS_WITH_DESCRIPTION_PATTERN = Pattern.compile("<<([a-z0-9_\\-#\\.]+?),([^>]+?)>>",
Pattern.CASE_INSENSITIVE);
private static final Set IGNORED_GUIDES = Set.of(
// contains a reference to container-image.adoc#s2i that I don't know how to fix
"deploying-to-kubernetes.adoc",
// contains a reference to container-image.adoc#s2i that I don't know how to fix
"deploying-to-openshift.adoc");
private final Path srcDir;
private final Index referenceIndex;
public static void main(String[] args) throws Exception {
CheckCrossReferences checker = new CheckCrossReferences(args.length >= 1
? Path.of(args[0])
: docsDir().resolve("src/main/asciidoc"),
args.length >= 2
? Path.of(args[1])
: docsDir().resolve("target/referenceIndex.yaml"));
System.out.println("[INFO] Checking cross references using: " + args[0]);
Map> errors = checker.check();
if (!errors.isEmpty()) {
StringBuffer errorLog = new StringBuffer("Unable to find cross reference for:\n\n");
for (Entry> errorEntry : errors.entrySet()) {
errorLog.append("- " + errorEntry.getKey() + "\n");
for (String error : errorEntry.getValue()) {
errorLog.append(" . " + error + "\n");
}
}
errorLog.append("See https://quarkus.io/guides/doc-reference#cross-references");
throw new IllegalStateException(errorLog.toString());
}
System.out.println("[INFO] Done");
}
public CheckCrossReferences(Path srcDir, Path referenceIndexPath)
throws StreamReadException, DatabindException, IOException {
if (!Files.exists(srcDir) || !Files.isDirectory(srcDir)) {
throw new IllegalStateException(
String.format("Source directory (%s) does not exist", srcDir.toAbsolutePath()));
}
this.srcDir = srcDir;
if (!Files.exists(referenceIndexPath) || !Files.isReadable(referenceIndexPath)) {
throw new IllegalStateException(
String.format("Reference index does not exist or is not readable", referenceIndexPath.toAbsolutePath()));
}
ObjectMapper om = new ObjectMapper(new YAMLFactory().enable(YAMLGenerator.Feature.MINIMIZE_QUOTES));
this.referenceIndex = om.readValue(referenceIndexPath.toFile(), Index.class);
}
private Map> check() throws IOException {
final Map titlesByReference = referenceIndex.getReferences().stream()
.collect(Collectors.toMap(s -> s.getReference(), s -> s.getTitle()));
final Map> errors = new TreeMap<>();
try (Stream pathStream = Files.list(srcDir)) {
pathStream.filter(path -> includeFile(path.getFileName().toString()))
.forEach(path -> {
List guideLines;
try {
guideLines = Files.readAllLines(path);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
String fileName = path.getFileName().toString();
StringBuilder currentBuffer = new StringBuilder();
boolean inSourceBlock = false;
boolean findDelimiter = false;
String currentSourceBlockDelimiter = "----";
int lineNumber = 0;
for (String line : guideLines) {
lineNumber++;
if (inSourceBlock) {
if (findDelimiter) {
if (line.isBlank() || line.startsWith(".")) {
continue;
}
if (!line.startsWith(SOURCE_BLOCK_DELIMITER)) {
throw new IllegalStateException("Unable to find source block delimiter in file "
+ fileName + " at line " + lineNumber);
}
currentSourceBlockDelimiter = line.stripTrailing();
findDelimiter = false;
continue;
}
if (line.stripTrailing().equals(currentSourceBlockDelimiter)) {
inSourceBlock = false;
}
continue;
}
if (line.startsWith(SOURCE_BLOCK_PREFIX)) {
inSourceBlock = true;
findDelimiter = true;
if (currentBuffer.length() > 0) {
checkLinks(titlesByReference, errors, fileName, currentBuffer.toString());
currentBuffer.setLength(0);
}
continue;
}
currentBuffer.append(line + "\n");
}
if (currentBuffer.length() > 0) {
checkLinks(titlesByReference, errors, fileName, currentBuffer.toString());
}
});
}
return errors;
}
private static void checkLinks(Map titlesByReference,
Map> errors,
String fileName,
String content) {
Matcher matcher = XREF_PATTERN.matcher(content);
while (matcher.find()) {
String reference = getQualifiedReference(fileName, matcher.group(1));
if (!titlesByReference.containsKey(reference)) {
addError(errors, fileName, reference + " in link " + matcher.group());
}
}
matcher = ANGLE_BRACKETS_WITHOUT_DESCRIPTION_PATTERN.matcher(content);
while (matcher.find()) {
String reference = getQualifiedReference(fileName, matcher.group(1));
if (!titlesByReference.containsKey(reference)) {
addError(errors, fileName, reference + " in link " + matcher.group());
}
}
matcher = ANGLE_BRACKETS_WITH_DESCRIPTION_PATTERN.matcher(content);
while (matcher.find()) {
String reference = getQualifiedReference(fileName, matcher.group(1));
if (!titlesByReference.containsKey(reference)) {
addError(errors, fileName, reference + " in link " + matcher.group());
}
}
}
private boolean includeFile(String fileName) {
if (fileName.startsWith("_attributes") || fileName.equals("README.adoc")) {
return false;
}
if (fileName.startsWith("doc-")) {
// these files are for the doc infrastructure and contain a lot of examples that would be hard to ignore in the checks
return false;
}
if (IGNORED_GUIDES.contains(fileName)) {
return false;
}
if (fileName.endsWith(".adoc")) {
return true;
}
return false;
}
private static String getQualifiedReference(String fileName, String reference) {
reference = normalizeAdoc(reference);
if (reference.startsWith("#")) {
return fileName + reference;
}
if (reference.contains(".adoc")) {
return reference;
}
if (reference.contains("#")) {
int hashIndex = reference.indexOf('#');
return reference.substring(0, hashIndex) + ".adoc" + reference.substring(hashIndex);
}
return fileName + "#" + reference;
}
private static String normalizeAdoc(String adoc) {
if (adoc.startsWith("./")) {
return adoc.substring(2);
}
return adoc;
}
private static void addError(Map> errors, String fileName, String error) {
errors.computeIfAbsent(fileName, f -> new ArrayList<>())
.add(error);
}
private static Path docsDir() {
Path path = Paths.get(System.getProperty("user.dir"));
if (path.endsWith("docs")) {
return path;
}
return path.resolve("docs");
}
}
