Add --db and let the user choose where the database lives

- `kareer --db <path>` works for the GUI and every subcommand, before
  or after the subcommand name, and creates the file if missing. main()
  strips it from argv before CLI/GUI routing; every parser declares it
  so it shows in --help.
- Path precedence: --db > KAREER_DB_PATH > the location chosen in the
  GUI (kareerrc [Database] Path, read at startup for GUI and CLI alike)
  > $XDG_DATA_HOME/kareer/kareer.sqlite.
- First GUI run (nothing forced, no file yet, or the configured file
  has gone missing): DatabaseSetupDialog offers the default location, a
  folder of the user's choice, or an existing database used in place.
  Until then JobsDatabase opens nothing.
- Preferences gains a Database section: Move to... (copies, leaves the
  original), Open Existing..., Use Default Location. Refuses foreign
  SQLite files and unwritable ones.
- Models call JobsDatabase::reopenIfPathChanged() on refresh, so
  switching databases needs no restart.
- Link KF6::ConfigCore; add a QuickDialogs2 configure-time guard; add
  kconfig to the Arch dependencies and a note to the Flatpak manifest.
- README documents --db, the precedence, and the first-run choice, and
  gains Fedora 44 build dependencies; CONTRIBUTING gets a dev recipe.

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01BxDf7HqD1xPnsZP8wt3NTk

src/CMakeLists.txt

@@ -21,6 +21,7 @@ qt_add_qml_module(kareer
         qml/DashboardPage.qml
         qml/SankeyDiagram.qml
         qml/SettingsPage.qml
+        qml/DatabaseSetupDialog.qml
     SOURCES
         jobsmodel.cpp
         jobsmodel.h
@@ -32,6 +33,8 @@ qt_add_qml_module(kareer
         jobeditmodel.h
         appcolorscheme.cpp
         appcolorscheme.h
+        databaselocation.cpp
+        databaselocation.h
 )
 
 target_include_directories(kareer PRIVATE ${CMAKE_BINARY_DIR})
@@ -44,6 +47,7 @@ target_link_libraries(kareer PRIVATE
     Qt6::Quick
     Qt6::QuickControls2
     Qt6::Sql
+    KF6::ConfigCore
     KF6::I18n
     KF6::I18nQml
     KF6::CoreAddons

src/clicommands.cpp

@@ -26,6 +26,13 @@ using namespace Qt::Literals::StringLiterals;
 namespace
 {
 
+/// --db is applied and stripped in main() before any parser runs; declaring
+/// it here only documents it in each subcommand's --help.
+void addDbOption(QCommandLineParser &parser)
+{
+    parser.addOption({u"db"_s, u"Use this database file instead of the configured one"_s, u"path"_s});
+}
+
 QJsonValue optionalInt(int value)
 {
     return value < 0 ? QJsonValue() : QJsonValue(value);
@@ -159,6 +166,7 @@ int runAdd(const QString &program, const QStringList &args)
     QCommandLineParser parser;
     parser.setApplicationDescription(u"Add a new job application"_s);
     parser.addHelpOption();
+    addDbOption(parser);
     addCommonJobOptions(parser);
     parser.process(QStringList{program} + args);
 
@@ -225,6 +233,7 @@ int runList(const QString &program, const QStringList &args)
     QCommandLineParser parser;
     parser.setApplicationDescription(u"List job applications"_s);
     parser.addHelpOption();
+    addDbOption(parser);
     parser.addOption({u"stage"_s, u"Filter by stage"_s, u"stage"_s});
     parser.addOption({u"company"_s, u"Filter by company (substring match)"_s, u"text"_s});
     parser.addOption({u"json"_s, u"Print machine-readable JSON"_s});
@@ -272,6 +281,7 @@ int runShow(const QString &program, const QStringList &args)
     QCommandLineParser parser;
     parser.setApplicationDescription(u"Show one job application"_s);
     parser.addHelpOption();
+    addDbOption(parser);
     parser.addOption({u"json"_s, u"Print machine-readable JSON"_s});
     parser.addPositionalArgument(u"id"_s, u"Application id"_s);
     parser.process(QStringList{program} + args);
@@ -310,6 +320,7 @@ int runUpdate(const QString &program, const QStringList &args)
     QCommandLineParser parser;
     parser.setApplicationDescription(u"Update fields on an existing application"_s);
     parser.addHelpOption();
+    addDbOption(parser);
     addCommonJobOptions(parser);
     parser.addPositionalArgument(u"id"_s, u"Application id"_s);
     parser.process(QStringList{program} + args);
@@ -410,6 +421,7 @@ int runStage(const QString &program, const QStringList &args)
     QCommandLineParser parser;
     parser.setApplicationDescription(u"Move an application to a new stage"_s);
     parser.addHelpOption();
+    addDbOption(parser);
     parser.addOption({u"json"_s, u"Print machine-readable JSON"_s});
     parser.addPositionalArgument(u"id"_s, u"Application id"_s);
     parser.addPositionalArgument(u"stage"_s, u"New stage: %1"_s.arg(JobStage::canonicalStages().join(u", "_s)));
@@ -453,6 +465,7 @@ int runDelete(const QString &program, const QStringList &args)
     QCommandLineParser parser;
     parser.setApplicationDescription(u"Delete an application"_s);
     parser.addHelpOption();
+    addDbOption(parser);
     parser.addOption({u"yes"_s, u"Confirm deletion"_s});
     parser.addPositionalArgument(u"id"_s, u"Application id"_s);
     parser.process(QStringList{program} + args);
@@ -490,6 +503,7 @@ int runStats(const QString &program, const QStringList &args)
     QCommandLineParser parser;
     parser.setApplicationDescription(u"Summary statistics across all applications"_s);
     parser.addHelpOption();
+    addDbOption(parser);
     parser.addOption({u"json"_s, u"Print machine-readable JSON"_s});
     parser.process(QStringList{program} + args);
 
@@ -531,6 +545,7 @@ int runStages(const QString &program, const QStringList &args)
     QCommandLineParser parser;
     parser.setApplicationDescription(u"List the canonical pipeline stages"_s);
     parser.addHelpOption();
+    addDbOption(parser);
     parser.addOption({u"json"_s, u"Print machine-readable JSON"_s});
     parser.process(QStringList{program} + args);
 
@@ -557,7 +572,8 @@ int runHelp()
         << u"  list     List job applications\n"_s << u"  show     Show one job application\n"_s << u"  update   Update fields on an existing application\n"_s
         << u"  stage    Move an application to a new stage\n"_s << u"  delete   Delete an application\n"_s << u"  stats    Summary statistics\n"_s
         << u"  stages   List the canonical pipeline stages\n\n"_s << u"Run 'kareer <command> --help' for the options of a specific command.\n"_s
-        << u"Running kareer with no command (or an unrecognized one) starts the GUI.\n"_s;
+        << u"Running kareer with no command (or an unrecognized one) starts the GUI.\n\n"_s << u"Global options:\n"_s
+        << u"  --db <path>  Use this database file (created if missing) instead of the configured one\n"_s;
     return 0;
 }
 

src/databaselocation.cpp

@@ -0,0 +1,215 @@
+/*
+    SPDX-FileCopyrightText: 2026 ToServeTheKing <[email protected]>
+
+    SPDX-License-Identifier: GPL-3.0-or-later
+*/
+
+#include "databaselocation.h"
+
+#include "jobsdatabase.h"
+
+#include <KConfigGroup>
+#include <KLocalizedString>
+#include <KSharedConfig>
+
+#include <QDir>
+#include <QFile>
+#include <QFileInfo>
+#include <QSqlDatabase>
+
+using namespace Qt::Literals::StringLiterals;
+
+namespace
+{
+constexpr auto ConfigFile = "kareerrc";
+constexpr auto ConfigGroup = "Database";
+constexpr auto ConfigKey = "Path";
+constexpr auto DatabaseFileName = "kareer.sqlite";
+
+KConfigGroup databaseGroup()
+{
+    return KConfigGroup(KSharedConfig::openConfig(QString::fromLatin1(ConfigFile)), QString::fromLatin1(ConfigGroup));
+}
+
+QString folderFile(const QUrl &folder)
+{
+    return QDir(folder.toLocalFile()).filePath(QString::fromLatin1(DatabaseFileName));
+}
+}
+
+DatabaseLocation::DatabaseLocation(QObject *parent)
+    : QObject(parent)
+{
+    if (JobsDatabase::selectionPending() && !JobsDatabase::configuredPath().isEmpty()) {
+        m_missingPath = JobsDatabase::configuredPath();
+    }
+}
+
+void DatabaseLocation::loadConfiguredPath()
+{
+    JobsDatabase::setConfiguredPath(databaseGroup().readEntry(ConfigKey, QString()));
+}
+
+bool DatabaseLocation::needsSetup()
+{
+    return !JobsDatabase::hasForcedPath() && !QFileInfo::exists(JobsDatabase::defaultPath());
+}
+
+QString DatabaseLocation::path() const
+{
+    return JobsDatabase::selectionPending() ? QString() : JobsDatabase::defaultPath();
+}
+
+QString DatabaseLocation::standardPath() const
+{
+    return JobsDatabase::standardPath();
+}
+
+bool DatabaseLocation::setupPending() const
+{
+    return JobsDatabase::selectionPending();
+}
+
+QString DatabaseLocation::missingPath() const
+{
+    return m_missingPath;
+}
+
+bool DatabaseLocation::overridden() const
+{
+    return JobsDatabase::hasForcedPath();
+}
+
+QString DatabaseLocation::lastError() const
+{
+    return m_lastError;
+}
+
+QString DatabaseLocation::lastNotice() const
+{
+    return m_lastNotice;
+}
+
+bool DatabaseLocation::useDefault()
+{
+    return switchTo(QString(), false);
+}
+
+bool DatabaseLocation::createIn(const QUrl &folder)
+{
+    if (!folder.isLocalFile()) {
+        setMessages(i18n("Please choose a local folder."), QString());
+        return false;
+    }
+    return switchTo(folderFile(folder), false);
+}
+
+bool DatabaseLocation::useFile(const QUrl &file)
+{
+    if (!file.isLocalFile()) {
+        setMessages(i18n("Please choose a local file."), QString());
+        return false;
+    }
+    return switchTo(file.toLocalFile(), true);
+}
+
+bool DatabaseLocation::moveTo(const QUrl &folder)
+{
+    if (!folder.isLocalFile()) {
+        setMessages(i18n("Please choose a local folder."), QString());
+        return false;
+    }
+    const QString source = JobsDatabase::defaultPath();
+    const QString target = folderFile(folder);
+    if (QFileInfo(source).canonicalFilePath() == QFileInfo(target).canonicalFilePath()) {
+        setMessages(i18n("The database is already in that folder."), QString());
+        return false;
+    }
+    if (QFileInfo::exists(target)) {
+        setMessages(i18n("%1 already exists. Choose another folder, or open that file instead.", target), QString());
+        return false;
+    }
+    if (!QFile::copy(source, target)) {
+        setMessages(i18n("Could not copy the database to %1.", target), QString());
+        return false;
+    }
+    if (!switchTo(target, true)) {
+        QFile::remove(target);
+        return false;
+    }
+    setMessages(QString(), i18n("Now using %1. The previous file at %2 was left in place.", target, source));
+    return true;
+}
+
+void DatabaseLocation::clearMessages()
+{
+    setMessages(QString(), QString());
+}
+
+bool DatabaseLocation::switchTo(const QString &path, bool mustExist)
+{
+    const QString effective = path.isEmpty() ? JobsDatabase::standardPath() : path;
+
+    if (mustExist && !QFileInfo::exists(effective)) {
+        setMessages(i18n("%1 does not exist.", effective), QString());
+        return false;
+    }
+
+    // Refuse to add Kareer's tables to some unrelated SQLite file.
+    if (QFileInfo::exists(effective)) {
+        const QString connection = u"kareer_probe"_s;
+        bool foreign = false;
+        {
+            QSqlDatabase probe = QSqlDatabase::addDatabase(u"QSQLITE"_s, connection);
+            probe.setDatabaseName(effective);
+            probe.setConnectOptions(u"QSQLITE_OPEN_READONLY"_s);
+            if (probe.open()) {
+                const QStringList tables = probe.tables();
+                foreign = !tables.isEmpty() && !tables.contains(u"jobs"_s);
+            }
+            probe.close();
+        }
+        QSqlDatabase::removeDatabase(connection);
+        if (foreign) {
+            setMessages(i18n("%1 is not a Kareer database.", effective), QString());
+            return false;
+        }
+    }
+
+    {
+        // Opening creates the file and schema if needed; the write check
+        // catches files that can be read but not written (for example a
+        // single-file grant inside the Flatpak sandbox, where SQLite cannot
+        // create its journal next to the database).
+        JobsDatabase db(effective);
+        if (!db.isOpen() || !db.lastError().isEmpty() || !db.checkWritable()) {
+            setMessages(i18n("Could not use %1: %2", effective, db.lastError()), QString());
+            return false;
+        }
+    }
+
+    KConfigGroup group = databaseGroup();
+    if (path.isEmpty()) {
+        group.deleteEntry(ConfigKey);
+    } else {
+        group.writeEntry(ConfigKey, path);
+    }
+    group.sync();
+
+    JobsDatabase::setConfiguredPath(path);
+    JobsDatabase::setSelectionPending(false);
+    m_missingPath.clear();
+    setMessages(QString(), QString());
+    Q_EMIT changed();
+    return true;
+}
+
+void DatabaseLocation::setMessages(const QString &error, const QString &notice)
+{
+    if (m_lastError == error && m_lastNotice == notice) {
+        return;
+    }
+    m_lastError = error;
+    m_lastNotice = notice;
+    Q_EMIT messageChanged();
+}

src/databaselocation.h

@@ -0,0 +1,83 @@
+/*
+    SPDX-FileCopyrightText: 2026 ToServeTheKing <[email protected]>
+
+    SPDX-License-Identifier: GPL-3.0-or-later
+*/
+
+#pragma once
+
+#include <QObject>
+#include <QQmlEngine>
+#include <QUrl>
+
+/**
+ * Where the database lives, as chosen by the user: the first-run dialog and
+ * the Preferences page drive this. The choice is stored in kareerrc
+ * ([Database] Path) and pushed into JobsDatabase::setConfiguredPath(); the
+ * --db option and KAREER_DB_PATH still win over it (see JobsDatabase::defaultPath()).
+ *
+ * Emits changed() after every switch; Main.qml reacts by refreshing the
+ * models, which reopen themselves via JobsDatabase::reopenIfPathChanged().
+ */
+class DatabaseLocation : public QObject
+{
+    Q_OBJECT
+    QML_ELEMENT
+    QML_SINGLETON
+
+    /// The effective database file, or empty while the first-run choice is pending.
+    Q_PROPERTY(QString path READ path NOTIFY changed)
+    /// $XDG_DATA_HOME/kareer/kareer.sqlite.
+    Q_PROPERTY(QString standardPath READ standardPath CONSTANT)
+    Q_PROPERTY(bool setupPending READ setupPending NOTIFY changed)
+    /// The configured file that could not be found (so setup is being asked again), if any.
+    Q_PROPERTY(QString missingPath READ missingPath NOTIFY changed)
+    /// True when --db or KAREER_DB_PATH is in effect; the stored location is then ignored.
+    Q_PROPERTY(bool overridden READ overridden CONSTANT)
+    Q_PROPERTY(QString lastError READ lastError NOTIFY messageChanged)
+    Q_PROPERTY(QString lastNotice READ lastNotice NOTIFY messageChanged)
+
+public:
+    explicit DatabaseLocation(QObject *parent = nullptr);
+
+    /// Reads kareerrc into JobsDatabase::setConfiguredPath(). Call once at
+    /// startup, for both the GUI and the CLI, so they share one database.
+    static void loadConfiguredPath();
+
+    /// True when the GUI should ask where the database lives: nothing forces
+    /// a path and the file it would open does not exist yet.
+    static bool needsSetup();
+
+    QString path() const;
+    QString standardPath() const;
+    bool setupPending() const;
+    QString missingPath() const;
+    bool overridden() const;
+    QString lastError() const;
+    QString lastNotice() const;
+
+    /// Create (or reuse) the database at the standard location.
+    Q_INVOKABLE bool useDefault();
+    /// Create (or reuse) kareer.sqlite inside the chosen folder.
+    Q_INVOKABLE bool createIn(const QUrl &folder);
+    /// Use an existing database file where it is.
+    Q_INVOKABLE bool useFile(const QUrl &file);
+    /// Copy the current database into the chosen folder and switch to the
+    /// copy. The original file is left in place.
+    Q_INVOKABLE bool moveTo(const QUrl &folder);
+
+    Q_INVOKABLE void clearMessages();
+
+Q_SIGNALS:
+    void changed();
+    void messageChanged();
+
+private:
+    /// Validates path, stores it (empty = standard location), and switches to it.
+    bool switchTo(const QString &path, bool mustExist);
+    void setMessages(const QString &error, const QString &notice);
+
+    QString m_missingPath;
+    QString m_lastError;
+    QString m_lastNotice;
+};

src/jobsdatabase.cpp

@@ -22,6 +22,10 @@ namespace
 {
 QAtomicInteger<int> s_connectionCounter{0};
 
+QString s_pathOverride;
+QString s_configuredPath;
+bool s_selectionPending = false;
+
 QVariant salaryToVariant(int value)
 {
     if (value < 0) {
@@ -38,6 +42,10 @@ int salaryFromVariant(const QVariant &value)
 
 JobsDatabase::JobsDatabase()
 {
+    if (s_selectionPending) {
+        m_lastError = u"No database selected"_s;
+        return;
+    }
     init(defaultPath());
 }
 
@@ -48,6 +56,14 @@ JobsDatabase::JobsDatabase(const QString &path)
 
 JobsDatabase::~JobsDatabase()
 {
+    close();
+}
+
+void JobsDatabase::close()
+{
+    if (m_connectionName.isEmpty()) {
+        return;
+    }
     {
         QSqlDatabase db = QSqlDatabase::database(m_connectionName, false);
         if (db.isValid()) {
@@ -55,22 +71,103 @@ JobsDatabase::~JobsDatabase()
         }
     }
     QSqlDatabase::removeDatabase(m_connectionName);
+    m_connectionName.clear();
+    m_path.clear();
 }
 
 QString JobsDatabase::defaultPath()
 {
-    const QString overridePath = qEnvironmentVariable("KAREER_DB_PATH");
-    if (!overridePath.isEmpty()) {
-        return overridePath;
+    if (!s_pathOverride.isEmpty()) {
+        return s_pathOverride;
     }
-    const QString dir = QStandardPaths::writableLocation(QStandardPaths::GenericDataLocation) + u"/kareer"_s;
-    QDir().mkpath(dir);
-    return dir + u"/kareer.sqlite"_s;
+    const QString envPath = qEnvironmentVariable("KAREER_DB_PATH");
+    if (!envPath.isEmpty()) {
+        return envPath;
+    }
+    if (!s_configuredPath.isEmpty()) {
+        return s_configuredPath;
+    }
+    return standardPath();
+}
+
+QString JobsDatabase::standardPath()
+{
+    return QStandardPaths::writableLocation(QStandardPaths::GenericDataLocation) + u"/kareer/kareer.sqlite"_s;
+}
+
+void JobsDatabase::setPathOverride(const QString &path)
+{
+    s_pathOverride = path;
+}
+
+void JobsDatabase::setConfiguredPath(const QString &path)
+{
+    s_configuredPath = path;
+}
+
+QString JobsDatabase::configuredPath()
+{
+    return s_configuredPath;
+}
+
+bool JobsDatabase::hasForcedPath()
+{
+    return !s_pathOverride.isEmpty() || !qEnvironmentVariableIsEmpty("KAREER_DB_PATH");
+}
+
+void JobsDatabase::setSelectionPending(bool pending)
+{
+    s_selectionPending = pending;
+}
+
+bool JobsDatabase::selectionPending()
+{
+    return s_selectionPending;
+}
+
+QString JobsDatabase::path() const
+{
+    return m_path;
+}
+
+bool JobsDatabase::reopenIfPathChanged()
+{
+    if (s_selectionPending) {
+        return false;
+    }
+    const QString wanted = defaultPath();
+    if (!m_path.isEmpty() && wanted == m_path) {
+        return false;
+    }
+    close();
+    m_lastError.clear();
+    init(wanted);
+    return true;
+}
+
+bool JobsDatabase::checkWritable()
+{
+    if (!isOpen()) {
+        return false;
+    }
+    QSqlQuery query(QSqlDatabase::database(m_connectionName));
+    if (!query.exec(u"PRAGMA user_version"_s) || !query.next()) {
+        m_lastError = query.lastError().text();
+        return false;
+    }
+    const int version = query.value(0).toInt();
+    query.finish();
+    if (!query.exec(u"PRAGMA user_version = %1"_s.arg(version))) {
+        m_lastError = query.lastError().text();
+        return false;
+    }
+    return true;
 }
 
 void JobsDatabase::init(const QString &path)
 {
     m_connectionName = u"kareer_conn_%1"_s.arg(s_connectionCounter.fetchAndAddRelaxed(1));
+    m_path = path;
 
     QDir().mkpath(QFileInfo(path).absolutePath());
 
@@ -191,6 +288,9 @@ Job JobsDatabase::jobFromQuery(QSqlQuery &query) const
 QList<Job> JobsDatabase::allJobs() const
 {
     QList<Job> jobs;
+    if (!isOpen()) {
+        return jobs;
+    }
     QSqlQuery query(QSqlDatabase::database(m_connectionName));
     query.prepare(u"SELECT * FROM jobs ORDER BY date_applied DESC, id DESC"_s);
     if (!query.exec()) {
@@ -204,6 +304,9 @@ QList<Job> JobsDatabase::allJobs() const
 
 std::optional<Job> JobsDatabase::jobById(int id) const
 {
+    if (!isOpen()) {
+        return std::nullopt;
+    }
     QSqlQuery query(QSqlDatabase::database(m_connectionName));
     query.prepare(u"SELECT * FROM jobs WHERE id = :id"_s);
     query.bindValue(u":id"_s, id);
@@ -379,6 +482,9 @@ bool JobsDatabase::deleteJob(int id)
 QList<StageTransition> JobsDatabase::stageTransitions() const
 {
     QList<StageTransition> transitions;
+    if (!isOpen()) {
+        return transitions;
+    }
     QSqlQuery query(QSqlDatabase::database(m_connectionName));
     query.prepare(u"SELECT job_id, from_stage, to_stage, changed_at FROM stage_history ORDER BY changed_at ASC, id ASC"_s);
     if (!query.exec()) {

src/jobsdatabase.h

@@ -31,10 +31,42 @@ public:
     JobsDatabase(const JobsDatabase &) = delete;
     JobsDatabase &operator=(const JobsDatabase &) = delete;
 
-    /// Default location: $XDG_DATA_HOME/kareer/kareer.sqlite, overridable
-    /// with the KAREER_DB_PATH environment variable (used by autotests).
+    /// The database file a default-constructed instance opens. Resolved in
+    /// order: the --db override, the KAREER_DB_PATH environment variable
+    /// (used by autotests), the path configured in kareerrc, and finally
+    /// $XDG_DATA_HOME/kareer/kareer.sqlite.
     static QString defaultPath();
 
+    /// $XDG_DATA_HOME/kareer/kareer.sqlite, ignoring every override.
+    static QString standardPath();
+
+    /// Set from the --db command-line option; wins over everything else.
+    static void setPathOverride(const QString &path);
+
+    /// The user's chosen location (kareerrc); empty means standardPath().
+    static void setConfiguredPath(const QString &path);
+    static QString configuredPath();
+
+    /// True when --db or KAREER_DB_PATH decides the path, so the configured
+    /// location has no effect.
+    static bool hasForcedPath();
+
+    /// While true (GUI first run, before the user has picked a location), a
+    /// default-constructed instance opens nothing and reports an error.
+    static void setSelectionPending(bool pending);
+    static bool selectionPending();
+
+    /// The file this instance opened, or empty if it opened nothing.
+    QString path() const;
+
+    /// Reopens against defaultPath() if that no longer matches path() (the
+    /// user picked another location). Returns true if it reopened.
+    bool reopenIfPathChanged();
+
+    /// Performs a harmless write (rewrites the header's user_version), so
+    /// callers can tell a read-only file apart from a usable one.
+    bool checkWritable();
+
     bool isOpen() const;
     QString lastError() const;
 
@@ -59,9 +91,11 @@ public:
 
 private:
     void init(const QString &path);
+    void close();
     bool migrate();
     Job jobFromQuery(class QSqlQuery &query) const;
 
     QString m_connectionName;
+    QString m_path;
     QString m_lastError;
 };

src/jobsmodel.cpp

@@ -17,6 +17,7 @@ JobsModel::JobsModel(QObject *parent)
 
 void JobsModel::refresh()
 {
+    m_db.reopenIfPathChanged();
     beginResetModel();
     m_jobs = m_db.allJobs();
     endResetModel();

src/main.cpp

@@ -7,6 +7,8 @@
 #include "kareer-version.h"
 
 #include "clicommands.h"
+#include "databaselocation.h"
+#include "jobsdatabase.h"
 
 #include <KAboutData>
 #include <KCrash>
@@ -17,6 +19,7 @@
 #include <QApplication>
 #include <QCommandLineParser>
 #include <QCoreApplication>
+#include <QFileInfo>
 #include <QIcon>
 #include <QQmlApplicationEngine>
 #include <QQuickStyle>
@@ -63,12 +66,50 @@ static void messageHandler(QtMsgType type, const QMessageLogContext &context, co
     }
 }
 
+/// Removes "--db <path>" / "--db=<path>" from argv (anywhere on the command
+/// line, for both the GUI and every subcommand) and applies it as the
+/// database override. Stripping it up front keeps "kareer --db x list"
+/// routing to the CLI. Returns false if --db is missing its value.
+static bool takeDbOption(int &argc, char **argv)
+{
+    int out = 1;
+    for (int in = 1; in < argc; ++in) {
+        const QString arg = QString::fromLocal8Bit(argv[in]);
+        QString value;
+        if (arg == u"--db"_s) {
+            if (in + 1 >= argc) {
+                fprintf(stderr, "kareer: --db requires a path\n");
+                return false;
+            }
+            value = QString::fromLocal8Bit(argv[++in]);
+        } else if (arg.startsWith(u"--db="_s)) {
+            value = arg.mid(5);
+        } else {
+            argv[out++] = argv[in];
+            continue;
+        }
+        if (value.isEmpty()) {
+            fprintf(stderr, "kareer: --db requires a path\n");
+            return false;
+        }
+        JobsDatabase::setPathOverride(QFileInfo(value).absoluteFilePath());
+    }
+    argv[out] = nullptr;
+    argc = out;
+    return true;
+}
+
 int main(int argc, char *argv[])
 {
     s_defaultMessageHandler = qInstallMessageHandler(messageHandler);
 
+    if (!takeDbOption(argc, argv)) {
+        return 1;
+    }
+
     if (argc >= 2 && Cli::isSubcommand(QString::fromLocal8Bit(argv[1]))) {
         QCoreApplication app(argc, argv);
+        DatabaseLocation::loadConfiguredPath();
         return Cli::run(app);
     }
 
@@ -99,9 +140,16 @@ int main(int argc, char *argv[])
 
     QCommandLineParser parser;
     aboutData.setupCommandLine(&parser);
+    // Handled (and stripped) by takeDbOption(); declared here for --help.
+    parser.addOption(QCommandLineOption(u"db"_s, i18n("Use this database file instead of the configured one."), i18n("path")));
     parser.process(app);
     aboutData.processCommandLine(&parser);
 
+    DatabaseLocation::loadConfiguredPath();
+    // First run (or the configured file has gone missing): open nothing until
+    // the user picks a location in DatabaseSetupDialog. The CLI never waits.
+    JobsDatabase::setSelectionPending(DatabaseLocation::needsSetup());
+
     QQmlApplicationEngine engine;
     KLocalization::setupLocalizedContext(&engine);
 

src/qml/DatabaseSetupDialog.qml

@@ -0,0 +1,104 @@
+/*
+    SPDX-FileCopyrightText: 2026 ToServeTheKing <[email protected]>
+
+    SPDX-License-Identifier: GPL-3.0-or-later
+*/
+
+pragma ComponentBehavior: Bound
+
+// First-run choice of where the database lives. Shown by Main.qml while
+// DatabaseLocation.setupPending is true; it cannot be dismissed until a
+// location has been picked, since nothing can be saved before then.
+import QtQuick
+import QtQuick.Controls as QQC2
+import QtQuick.Dialogs
+import QtQuick.Layouts
+import org.kde.kirigami as Kirigami
+import org.kde.kirigamiaddons.formcard as FormCard
+import io.github.toservetheking.Kareer
+
+Kirigami.Dialog {
+    id: root
+
+    title: i18nc("@title:window", "Welcome to Kareer")
+    showCloseButton: false
+    closePolicy: QQC2.Popup.NoAutoClose
+    modal: true
+    preferredWidth: Kirigami.Units.gridUnit * 26
+    standardButtons: Kirigami.Dialog.NoButton
+
+    onOpened: DatabaseLocation.clearMessages()
+
+    ColumnLayout {
+        spacing: 0
+
+        QQC2.Label {
+            Layout.fillWidth: true
+            Layout.margins: Kirigami.Units.largeSpacing
+            wrapMode: Text.Wrap
+            text: DatabaseLocation.missingPath.length > 0
+                ? xi18nc("@info", "The database at <filename>%1</filename> could not be found. Choose where Kareer should keep your applications.", DatabaseLocation.missingPath)
+                : i18nc("@info", "Choose where Kareer should keep your applications.")
+        }
+
+        Kirigami.InlineMessage {
+            Layout.fillWidth: true
+            Layout.leftMargin: Kirigami.Units.largeSpacing
+            Layout.rightMargin: Kirigami.Units.largeSpacing
+            Layout.bottomMargin: Kirigami.Units.smallSpacing
+            type: Kirigami.MessageType.Error
+            text: DatabaseLocation.lastError
+            visible: text.length > 0
+        }
+
+        FormCard.FormButtonDelegate {
+            Layout.fillWidth: true
+            icon.name: "document-new"
+            text: i18nc("@action:button", "Create in the default location")
+            description: DatabaseLocation.standardPath
+            onClicked: {
+                if (DatabaseLocation.useDefault()) {
+                    root.close();
+                }
+            }
+        }
+
+        FormCard.FormButtonDelegate {
+            Layout.fillWidth: true
+            icon.name: "folder-new"
+            text: i18nc("@action:button", "Choose a folder…")
+            description: i18nc("@info", "Create a new database in a folder of your choice, for example a synced folder.")
+            onClicked: folderDialog.open()
+        }
+
+        FormCard.FormButtonDelegate {
+            Layout.fillWidth: true
+            icon.name: "document-open"
+            text: i18nc("@action:button", "Open an existing database…")
+            description: i18nc("@info", "Use a kareer.sqlite file you already have, where it is.")
+            onClicked: fileDialog.open()
+        }
+    }
+
+    FolderDialog {
+        id: folderDialog
+        title: i18nc("@title:window", "Choose a Folder for the Database")
+        onAccepted: {
+            if (DatabaseLocation.createIn(selectedFolder)) {
+                root.close();
+            }
+        }
+    }
+
+    FileDialog {
+        id: fileDialog
+        title: i18nc("@title:window", "Open Database")
+        fileMode: FileDialog.OpenFile
+        nameFilters: [i18nc("@item:inlistbox", "Kareer databases (*.sqlite)"), i18nc("@item:inlistbox", "All files (*)")]
+        onAccepted: {
+            if (DatabaseLocation.useFile(selectedFile)) {
+                root.close();
+            }
+        }
+    }
+}

src/qml/Main.qml

@@ -25,6 +25,27 @@ Kirigami.ApplicationWindow {
         id: jobsModel
     }
 
+    // The database moved (first-run choice or Preferences): reload the list,
+    // which cascades to the dashboard via countChanged, and leave any open
+    // edit form, since its job id belonged to the previous database.
+    Connections {
+        target: DatabaseLocation
+        function onChanged(): void {
+            jobsModel.refresh();
+            root.showDashboard();
+        }
+    }
+
+    DatabaseSetupDialog {
+        id: setupDialog
+    }
+
+    Component.onCompleted: {
+        if (DatabaseLocation.setupPending) {
+            setupDialog.open();
+        }
+    }
+
     // The job currently open in the edit form, so the sidebar can keep it highlighted.
     property int currentJobId: -1
 

src/qml/SettingsPage.qml

@@ -11,6 +11,7 @@ pragma ComponentBehavior: Bound
 // header, no card/border around them.
 import QtQuick
 import QtQuick.Controls as QQC2
+import QtQuick.Dialogs
 import QtQuick.Layouts
 import org.kde.kirigami as Kirigami
 import io.github.toservetheking.Kareer
@@ -75,5 +76,94 @@ Kirigami.ScrollablePage {
                 displayText: AppColorScheme.activeColorSchemeName
             }
         }
+
+        Kirigami.ListSectionHeader {
+            Layout.fillWidth: true
+            text: i18nc("@title:group", "Database")
+        }
+
+        ColumnLayout {
+            Layout.fillWidth: true
+            Layout.leftMargin: Kirigami.Units.largeSpacing
+            Layout.rightMargin: Kirigami.Units.largeSpacing
+            Layout.topMargin: Kirigami.Units.smallSpacing
+            Layout.bottomMargin: Kirigami.Units.smallSpacing
+            spacing: Kirigami.Units.smallSpacing
+
+            QQC2.Label {
+                Layout.fillWidth: true
+                text: i18nc("@label", "Location")
+            }
+            QQC2.Label {
+                Layout.fillWidth: true
+                text: DatabaseLocation.path
+                wrapMode: Text.WrapAnywhere
+                opacity: 0.7
+            }
+
+            Kirigami.InlineMessage {
+                Layout.fillWidth: true
+                type: Kirigami.MessageType.Information
+                text: i18nc("@info", "Set by the --db option or the KAREER_DB_PATH environment variable, so it can't be changed here.")
+                visible: DatabaseLocation.overridden
+            }
+            Kirigami.InlineMessage {
+                Layout.fillWidth: true
+                type: Kirigami.MessageType.Error
+                text: DatabaseLocation.lastError
+                visible: text.length > 0
+            }
+            Kirigami.InlineMessage {
+                Layout.fillWidth: true
+                type: Kirigami.MessageType.Positive
+                text: DatabaseLocation.lastNotice
+                visible: text.length > 0
+            }
+
+            Flow {
+                Layout.fillWidth: true
+                spacing: Kirigami.Units.smallSpacing
+                enabled: !DatabaseLocation.overridden
+
+                QQC2.Button {
+                    icon.name: "folder-move"
+                    text: i18nc("@action:button", "Move to…")
+                    QQC2.ToolTip.text: i18nc("@info:tooltip", "Copy the database into another folder and use the copy from now on. The current file is left in place.")
+                    QQC2.ToolTip.visible: hovered
+                    QQC2.ToolTip.delay: Kirigami.Units.toolTipDelay
+                    onClicked: moveFolderDialog.open()
+                }
+                QQC2.Button {
+                    icon.name: "document-open"
+                    text: i18nc("@action:button", "Open Existing…")
+                    onClicked: openFileDialog.open()
+                }
+                QQC2.Button {
+                    icon.name: "edit-reset"
+                    text: i18nc("@action:button", "Use Default Location")
+                    visible: DatabaseLocation.path !== DatabaseLocation.standardPath
+                    QQC2.ToolTip.text: xi18nc("@info:tooltip", "Switch to <filename>%1</filename>. Nothing is copied.", DatabaseLocation.standardPath)
+                    QQC2.ToolTip.visible: hovered
+                    QQC2.ToolTip.delay: Kirigami.Units.toolTipDelay
+                    onClicked: DatabaseLocation.useDefault()
+                }
+            }
+        }
+    }
+
+    Component.onCompleted: DatabaseLocation.clearMessages()
+
+    FolderDialog {
+        id: moveFolderDialog
+        title: i18nc("@title:window", "Move Database To")
+        onAccepted: DatabaseLocation.moveTo(selectedFolder)
+    }
+
+    FileDialog {
+        id: openFileDialog
+        title: i18nc("@title:window", "Open Database")
+        fileMode: FileDialog.OpenFile
+        nameFilters: [i18nc("@item:inlistbox", "Kareer databases (*.sqlite)"), i18nc("@item:inlistbox", "All files (*)")]
+        onAccepted: DatabaseLocation.useFile(selectedFile)
     }
 }

src/statsmodel.cpp

@@ -17,6 +17,7 @@ StatsModel::StatsModel(QObject *parent)
 
 void StatsModel::refresh()
 {
+    m_db.reopenIfPathChanged();
     m_jobs = m_db.allJobs();
     Q_EMIT changed();
 }