Docker: Add Filepath::localSource()

FilePath::localSource can return a filepath that represents a local version
of a remote file.

It is used to let the debugger select the local version of a file when
debugging a remote target.

Change-Id: Ieb934ef0d454e8ff55e71df41dca825974d85da7
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: hjk <hjk@qt.io>

1 files changed, 27 insertions, 0 deletions

diff --git a/src/plugins/docker/dockerdevice.cpp b/src/plugins/docker/dockerdevice.cpp
index c37e2d106e..a71ccfef50 100644
--- a/src/plugins/docker/dockerdevice.cpp
+++ b/src/plugins/docker/dockerdevice.cpp
@@ -144,6 +144,7 @@ public:
     void changeMounts(QStringList newMounts);
     bool ensureReachable(const FilePath &other);
     void shutdown();
+    expected_str<FilePath> localSource(const FilePath &other) const;
 
     QString containerId() { return m_container; }
     DockerDeviceData data() { return m_data; }
@@ -828,6 +829,11 @@ bool DockerDevice::ensureReachable(const FilePath &other) const
     return d->ensureReachable(other.parentDir());
 }
 
+expected_str<FilePath> DockerDevice::localSource(const Utils::FilePath &other) const
+{
+    return d->localSource(other);
+}
+
 Environment DockerDevice::systemEnvironment() const
 {
     return d->environment();
@@ -1125,6 +1131,27 @@ void DockerDevicePrivate::changeMounts(QStringList newMounts)
     }
 }
 
+expected_str<FilePath> DockerDevicePrivate::localSource(const FilePath &other) const
+{
+    const auto devicePath = FilePath::fromString(other.path());
+    for (const TemporaryMountInfo &info : m_temporaryMounts) {
+        if (devicePath.isChildOf(info.containerPath)) {
+            const FilePath relativePath = devicePath.relativeChildPath(info.containerPath);
+            return info.path.pathAppended(relativePath.path());
+        }
+    }
+
+    for (const QString &mount : m_data.mounts) {
+        const FilePath mountPoint = FilePath::fromString(mount);
+        if (devicePath.isChildOf(mountPoint)) {
+            const FilePath relativePath = devicePath.relativeChildPath(mountPoint);
+            return mountPoint.pathAppended(relativePath.path());
+        }
+    }
+
+    return make_unexpected(Tr::tr("localSource: No mount point found for %1").arg(other.toString()));
+}
+
 bool DockerDevicePrivate::ensureReachable(const FilePath &other)
 {
     for (const QString &mount : m_data.mounts) {