Mercurial: Run update after pull

Get output of pull command and emit signal if update/merge is needed. On
update show update dialog.

Change-Id: I814f76daf3d89d0bd9485ed42a224b6b5d78bcb3
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/mercurial/mercurialclient.cpp

@@ -130,6 +130,29 @@ bool MercurialClient::synchronousClone(const QString &workingDir,
     }
 }
 
+bool MercurialClient::synchronousPull(const QString &workingDir, const QString &srcLocation, const QStringList &extraOptions)
+{
+    QStringList args;
+    args << vcsCommandString(PullCommand) << extraOptions << srcLocation;
+    // Disable UNIX terminals to suppress SSH prompting
+    const unsigned flags =
+            VcsBase::VcsBasePlugin::SshPasswordPrompt
+            | VcsBase::VcsBasePlugin::ShowStdOutInLogWindow
+            | VcsBase::VcsBasePlugin::ShowSuccessMessage;
+    const QString binary = settings()->binaryPath();
+    const int timeoutSec = settings()->value(settings()->timeoutKey).toInt();
+
+    // cause mercurial doesn`t understand LANG
+    QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
+    env.insert(QLatin1String("LANGUAGE"), QLatin1String("C"));
+    const Utils::SynchronousProcessResponse resp = VcsBase::VcsBasePlugin::runVcs(
+                workingDir, binary, args, timeoutSec * 1000, env, flags);
+    const bool ok = resp.result == Utils::SynchronousProcessResponse::Finished;
+
+    parsePullOutput(resp.stdOut.trimmed());
+    return ok;
+}
+
 QString MercurialClient::branchQuerySync(const QString &repositoryRoot)
 {
     QByteArray output;
@@ -377,6 +400,20 @@ MercurialClient::StatusItem MercurialClient::parseStatusLine(const QString &line
     return item;
 }
 
+void MercurialClient::parsePullOutput(const QString &output)
+{
+    if (output.endsWith(QLatin1String("no changes found")))
+        return;
+
+    if (output.endsWith(QLatin1String("(run 'hg update' to get a working copy)"))) {
+        emit needUpdate();
+        return;
+    }
+
+    if (output.endsWith(QLatin1String("'hg merge' to merge)")))
+        emit needMerge();
+}
+
 // Collect all parameters required for a diff to be able to associate them
 // with a diff editor and re-run the diff with parameters.
 struct MercurialDiffParameters

src/plugins/mercurial/mercurialclient.h

@@ -49,6 +49,9 @@ public:
                           const QString &srcLocation,
                           const QString &dstLocation,
                           const QStringList &extraOptions = QStringList());
+    bool synchronousPull(const QString &workingDir,
+                         const QString &srcLocation,
+                         const QStringList &extraOptions = QStringList());
     bool manifestSync(const QString &repository, const QString &filename);
     QString branchQuerySync(const QString &repositoryRoot);
     QStringList parentRevisionsSync(const QString &workingDirectory,
@@ -86,6 +89,13 @@ protected:
                                                             const QStringList &files,
                                                             const QStringList &extraOptions);
     StatusItem parseStatusLine(const QString &line) const;
+
+signals:
+    void needUpdate();
+    void needMerge();
+
+private:
+    void parsePullOutput(const QString &output);
 };
 
 } //namespace Internal

src/plugins/mercurial/mercurialplugin.cpp

@@ -140,6 +140,7 @@ bool MercurialPlugin::initialize(const QStringList & /* arguments */, QString *
     mercurialSettings.readSettings(core->settings());
 
     connect(m_client, SIGNAL(changed(QVariant)), versionControl(), SLOT(changed(QVariant)));
+    connect(m_client, SIGNAL(needUpdate()), this, SLOT(update()));
 
     static const char *describeSlot = SLOT(view(QString,QString));
     const int editorCount = sizeof(editorParameters)/sizeof(editorParameters[0]);