2025-02-04 10:18:26 +01:00
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package fr.monlouyan.bakefile;
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import java.io.IOException;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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2025-02-04 16:27:07 +01:00
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import java.util.*;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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2025-02-04 10:18:26 +01:00
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public class BakefileParser {
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2025-02-04 19:27:56 +01:00
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/**
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* Nom du fichier Bakefile à parser (donc Bakefile...).
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*/
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2025-02-04 10:18:26 +01:00
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private String filename;
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2025-02-04 16:27:07 +01:00
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/**
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* Regex pour détecter les targets et leurs dépendances.
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* Format : "nom : dépendance1 dépendance2"
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*/
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private static final Pattern TARGET_PATTERN = Pattern.compile("^(\\S+)\\s*:\\s*(.*)$");
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/**
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* Regex pour détecter les lignes de commande associées à une target.
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* Format : " gcc -o program program.c" (ligne indentée)
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*/
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private static final Pattern COMMAND_PATTERN = Pattern.compile("^\\s+(.+)$");
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2025-02-04 19:27:56 +01:00
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/**
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* Première cible trouvée dans le fichier Bakefile.
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*/
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private static String firstTarget;
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2025-02-04 10:18:26 +01:00
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public BakefileParser(String filename) {
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this.filename = filename;
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2025-02-04 19:27:56 +01:00
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firstTarget = null;
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2025-02-04 10:18:26 +01:00
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}
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2025-02-04 16:27:07 +01:00
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2025-02-04 17:31:25 +01:00
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public List<Rule> parse() {
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List<Rule> rules = new ArrayList<>();
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Set<String> phonyTargets = new HashSet<>();
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2025-02-04 10:34:06 +01:00
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if (!Files.exists(Paths.get(filename))) {
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System.out.println("*** No targets specified and no makefile found. Stop.");
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System.exit(1);
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}
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2025-02-04 16:27:07 +01:00
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2025-02-04 10:18:26 +01:00
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try {
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List<String> lines = Files.readAllLines(Paths.get(filename));
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2025-02-04 16:27:07 +01:00
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String currentTarget = null;
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List<String> dependencies = new ArrayList<>();
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List<String> commands = new ArrayList<>();
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2025-02-04 10:18:26 +01:00
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for (String line : lines) {
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2025-02-04 16:27:07 +01:00
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Matcher targetMatcher = TARGET_PATTERN.matcher(line);
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Matcher commandMatcher = COMMAND_PATTERN.matcher(line);
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if (targetMatcher.matches()) {
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2025-02-04 19:27:56 +01:00
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if (firstTarget == null) {
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firstTarget = targetMatcher.group(1);
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}
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2025-02-04 17:31:25 +01:00
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// Sauvegarde de la règle précédente si elle existe
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2025-02-04 16:27:07 +01:00
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if (currentTarget != null) {
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rules.add(new Rule(currentTarget, dependencies, commands, phonyTargets.contains(currentTarget)));
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2025-02-04 16:27:07 +01:00
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}
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2025-02-04 17:31:25 +01:00
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// Nouvelle cible détectée
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currentTarget = targetMatcher.group(1);
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dependencies = new ArrayList<>(Arrays.asList(targetMatcher.group(2).trim().split("\\s+")));
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commands = new ArrayList<>();
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} else if (commandMatcher.matches()) {
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2025-02-04 17:31:25 +01:00
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// Ligne de commande associée à la dernière cible trouvée
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2025-02-04 16:27:07 +01:00
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commands.add(commandMatcher.group(1));
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2025-02-04 10:18:26 +01:00
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}
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}
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2025-02-04 16:27:07 +01:00
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2025-02-04 17:31:25 +01:00
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// Ajout de la dernière règle après la boucle
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2025-02-04 16:27:07 +01:00
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if (currentTarget != null) {
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rules.add(new Rule(currentTarget, dependencies, commands, phonyTargets.contains(currentTarget)));
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}
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2025-02-04 10:18:26 +01:00
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} catch (IOException e) {
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e.printStackTrace();
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}
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return rules;
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2025-02-04 16:27:07 +01:00
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}
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2025-02-04 19:27:56 +01:00
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/**
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* Permet de récupérer la première cible trouvée dans le fichier Bakefile.
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* @return La première cible trouvée
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*/
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public static String getFirstTarget() { return firstTarget; }
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2025-02-04 16:27:07 +01:00
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}
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