Docker: Implement fallback for DockerDevice::directoryEntries()

Change-Id: I57430bc4cf79abfc07ccbe06746a0857e10053da
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/libs/utils/fileutils.cpp

@@ -969,7 +969,7 @@ bool FilePath::createDir() const
     return dir.mkpath(dir.absolutePath());
 }
 
-QList<FilePath> FilePath::dirEntries(const QStringList &nameFilters,
+FilePaths FilePath::dirEntries(const QStringList &nameFilters,
                                QDir::Filters filters,
                                QDir::SortFlags sort) const
 {
@@ -982,6 +982,41 @@ QList<FilePath> FilePath::dirEntries(const QStringList &nameFilters,
     return Utils::transform(entryInfoList, &FilePath::fromFileInfo);
 }
 
+FilePaths FilePath::filterEntriesHelper(const FilePath &base,
+                                        const QStringList &entries,
+                                        const QStringList &nameFilters,
+                                        QDir::Filters filters,
+                                        QDir::SortFlags sort)
+{
+    const QList<QRegularExpression> nameRegexps = transform(nameFilters, [](const QString &filter) {
+        QRegularExpression re;
+        re.setPattern(QRegularExpression::wildcardToRegularExpression(filter));
+        QTC_CHECK(re.isValid());
+        return re;
+    });
+
+    const auto nameMatches = [&nameRegexps](const QString &fileName) {
+        for (const QRegularExpression &re : nameRegexps) {
+            const QRegularExpressionMatch match = re.match(fileName);
+            if (match.hasMatch())
+                return true;
+        }
+        return false;
+    };
+
+    // FIXME: Handle sort and filters. For now bark on unsupported options.
+    QTC_CHECK(filters == QDir::NoFilter);
+    QTC_CHECK(sort == QDir::NoSort);
+
+    FilePaths result;
+    for (const QString &entry : entries) {
+        if (!nameMatches(entry))
+            continue;
+        result.append(base.pathAppended(entry));
+    }
+    return result;
+}
+
 QList<FilePath> FilePath::dirEntries(QDir::Filters filters) const
 {
     return dirEntries({}, filters);

src/libs/utils/fileutils.h

@@ -227,6 +227,11 @@ public:
     static void removeDuplicates(QList<FilePath> &files);
     static void sort(QList<FilePath> &files);
 
+    static QList<FilePath> filterEntriesHelper(const FilePath &base,
+                                               const QStringList &entries,
+                                               const QStringList &nameFilters,
+                                               QDir::Filters filters,
+                                               QDir::SortFlags sort);
 private:
     friend class ::tst_fileutils;
     static QString calcRelativePath(const QString &absolutePath, const QString &absoluteAnchorPath);

src/plugins/docker/dockerdevice.cpp

@@ -1192,8 +1192,13 @@ FilePaths DockerDevice::directoryEntries(const FilePath &filePath,
         });
     }
 
-    QTC_CHECK(false); // FIXME: Implement
-    return {};
+    QtcProcess proc;
+    proc.setCommand({"ls", {"-1", "-b", "--", filePath.path()}});
+    runProcess(proc);
+    proc.waitForFinished();
+
+    QStringList entries = proc.stdOut().split('\n', Qt::SkipEmptyParts);
+    return FilePath::filterEntriesHelper(filePath, entries, nameFilters, filters, sort);
 }
 
 QByteArray DockerDevice::fileContents(const FilePath &filePath, qint64 limit, qint64 offset) const