Gridsync

Added
- Basic support for fetching and displaying "newscap" messages; see `docs/proposed/newscaps.md` (Issue 184; PR 192, 211)
- Notification "badges" will now be displayed over the system tray icon to indicate unread newscap messages (Issue 226, PR 227)
- The application menu -- normally accessible by right-clicking the system tray icon -- is now also always accessible via a button in the status panel (Issue 201, PR 202)
- Clicking a desktop notification on Windows will now activate the main window (Issue 209; PR 210)
- macOS Mojave's "dark mode" is now supported (Issue 213, PR 217; Issue 267, PR 287)
- Added support for "cross-compiling" Gridsync binaries via Vagrant/VirtualBox; see `README.rst` (Issue 230, PR 231)
- Gridsync [AppImages](https://appimage.org/) are now available for GNU/Linux (Issue 245, PR 246, 248, 253)
- macOS builds have been [notarized](https://developer.apple.com/documentation/xcode/notarizing_macos_software_before_distribution) (Issue 261, PR 278)
- An optional "default" grid-connection/configuration can now be specified via `config.txt`, facilitating custom deployments that omit "invite code"-based configuration (PR 292)
- It is now possible to disable some features at runtime by modifying `config.txt` (PR 293)

Changed
- Binary distributions of Gridsync will now ship with Python version 3.7 (Issue 175; PR 187)
- The "remove" folder action and subsequent confirmation dialog have been re-framed/updated to "stop syncing" instead. In addition, removing/stopping a folder will now unlink it from the user's rootcap/Recovery Key by default (i.e., unless the user checks the accompanying checkbox to "keep a backup copy of this folder on $GridName") (Issue 183, PR 190)
- Various scripts, configurations, and operations relating to the Gridsync CI/testing/build process have been updated and improved, slightly reducing at least one developer's growing frustrations with Travis-CI and buildbot (PR 188)
- Twisted's `reactor.spawnProcess` will now be used for running `tahoe` subprocesses on Windows, instead of threaded `subprocess.Popen` calls (Issue 176, PR 195)
- GNU/Linux and Windows binary distributions will now use and ship with (Py)Qt version 5.15 (while macOS will use and ship 5.14, due to outstanding upstream bugs) (Issues 276, 267, 298; PRs 277, 287, 299)
- Due to ending upstream support and binary incompatibily with Qt 5.12, Debian 8 ("Jessie") and Ubuntu 14.04 ("Trusty Tahr") are no longer supported. Users running Debian 8 or Ubuntu 14.04 will need to upgrade their operating systems or build/install Gridsync from source (via `make`) (PR 196)
- High-DPI scaling (via Qt5's `AA_EnableHighDpiScaling` attribute) has been enabled on all platforms/environments (except for Qubes-OS and MATE -- see 204). In addition, font- and pixmap-scaling has been improved (Issue 193, 198, 232; PR 199, 203, 204, 233)
- The "Open Gridsync" menu action will now also un-minimize and re-focus the window in the event that it is already open (Issue 205; PR 206)
- Desktop notifications for connection/disconnection events are now disabled by default (Issue 218, PR 219)
- Binary distributions of Gridsync will now ship with Tahoe-LAFS version 1.14.0
- Python 3.5 support has been dropped; Gridsync now requires Python version 3.6 or higher (Issue 243, PR 244)
- Users are no longer required to scroll to the bottom of a debug log in order to export it (Issue 258, PR 259)
- [Versioneer](https://github.com/warner/python-versioneer) will now be used to manage version strings (PR 283; Issue 288, PR 289)
- On macOS, Gridsync will no longer run as an background-only/"agent" app; the application will again be visible in both the Dock and CMD+Tab window-list (Issue 284, PR 285)
- The grid-name will now be displayed in the status panel when "connected" instead of the number of connected/known storage nodes (Issue 296, PR 297)
- The number of connected/known storage nodes and total storage space remaining will now always be displayed in the status panel label's tooltip, instead of the (now-removed) "globe" icon/button (Issues 296, 300; PR 301)

Removed
- Due to changes in minimum system requirements for numerous dependencies, macOS "Legacy" builds (targeting macOS 10.9 or higher) will no longer be provided (Issue 256, PR 266); Gridsync now requires a minimum macOS version of 10.13 or higher.

Fixed
- "Cheat codes" that correspond to non-existent configuration files are now rejected as invalid (Issue 185; PR 186)
- `libstdc++` has been excluded from Linux PyInstaller bundles, preventing a crash that coincided with opening a native file-chooser dialog on ArchLinux (Issue 189, PR 191)
- The "syncing" system tray icon animation will no longer continue to animate endlessly if a folder is removed/stopped before it finishes syncing (Issue 197, PR 200)
- Gridsync will now use atomic writes for all local configuration file updates (Issue 212, PR 214)
- The default Qt MainWindow toolbar context menu has been disabled, preventing the situation in which a user might accidentally hide the toolbar with no way of re-showing it until the application re-launches (Issue 215, PR 216)
- `SetupRunner.ensure_recovery` will now only be called when joining new grids, preventing an unnecessary upload from occurring -- and sometimes failing, due to a race-condition -- when trying to join a grid that was already joined (Issue 220, PR 221)
- The unused "?"/"What's This" QDialog button (enabled by Qt on Windows by default) has been removed (Issue 222, PR 223)
- Double-clicking a newly-joined folder to open it before the tahoe daemon has finished (re)starting will no longer result in a crash (Issue 224, PR 225, 229)
- Modifying the application name via `config.txt` will no longer cause the `config_dir` tests to fail erroneously (Issue 234, PR 235)
- The "drop zone" border (visually indicating, by means of a dotted line, the area capable of adding new folders via drag-and-drop) is now rendered programmatically according to the dimensions of the enclosing window, thus preventing the border from appearing disproportionately thick when the MainWindow is enlarged or maximized (Issue 75, PR 240)
- The poorly-supported-by-Qt macOS "fullscreen" mode has been disabled for the MainWindow (and replaced with a more traditional "maximize" functionality), preventing the situation in which the application window could become stuck in fullscreen mode (Issue 241, PR 242)
- Left-clicking the "Action" button corresponding to a specific folder will now correctly deselect and exclude any other folders from the subsequent user-selected action (Issue 254, PR 255)
- Folders joined while connecting to a new grid will now appear immediately in the MainWindow folders view after the setup process completes (Issue 256, PR 257)
- On Windows, Gridsync will attempt to remove any stale magic-folder sqlite databases on exit/restart, preventing an issue in which previously-joined folders could not be re-downloaded (Issue 294, PR 295)
- Folders will no longer be erroneously shown as being "Up to date" if their corresponding `tahoe` client is not connected to the storage grid or has not completed a remote scan (Issue 300, PR 301).
- The "Scanning" folder status/phase has been combined with the "Syncing" phase and will no longer be displayed separately (PR 301).

Added
- An interface for viewing and exporting debugging information/logs for Gridsync and its underlying Tahoe-LAFS processes has been added (accessible via the system tray menu under "Help" -> "Export Debug Information...") (Issue 173, 168; PR 174, 179) -- thanks to exarkun for providing the Tahoe-side functionality to make this happen! :)

Changed
- "Sharing"-related actions have been reframed considerably throughout the interface in order to more precisely convey the underlying functionality of the application -- i.e., that "sharing" entails the _creating_ or _entering_ _invite codes_ and that these invite codes are created/entered on _devices_ (rather than "shared" with "persons") (Issue 139, PR 166). In particular:
- The "Enter Code" button on the MainWindow toolbar has been replaced with an "Invites" button (offering "Enter Invite Code" and "Create Invite Code" sub-actions), while the vague/ambiguous "Share" button has been removed completely
- The top-level "Share" action in the right-click/context menu has been replaced with a more accurate "Sync with Device" -> "Create Invite Code" menu/action hierarchy
- The "person" overlay/emblem (which appeared over icons for "shared" folders) has been replaced with a "laptop" overlay/emblem instead
- The tooltip for "shared" folders has removed references to "persons"
- The "Export Recovery Key" action in the systray menu has been removed (since it is already available on the MainWindow toolbar) (PR 166)
- The "Preferences" action/button on the MainWindow toolbar has been moved to the system tray menu (PR 166)
- The History View toggle has been moved to the right-hand side of the grid pulldown/combobox (PR 166)
- Binary distributions of Gridsync will now include a much newer build/version of Tahoe-LAFS that includes upstream support for magic-folders on macOS (Tahoe ticket [1432](https://tahoe-lafs.org/trac/tahoe-lafs/ticket/1432)) and other bug-fixes (Tahoe tickets [2965](https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2965), [2997](https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2997), [3006](https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3006), [3017](https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3017)) -- thanks (again) exarkun! :)
- Numerous logging messages have been updated to remove or redact potentially sensitive information such as folder names, file/directory paths, Tahoe-LAFS storage fURLs, and capabilities (Issue 61; PR 179, 181)

Fixed
- Gridsync will now perform an additional check to ensure that enough storage servers are available before attempting to make a directory, link/unlink a capability, or upload/download a file (effectively "pausing" or delaying these operations until a sufficient number of connections have been established) in order to reduce the likelihood of connection-related errors/failures when initially joining a storage grid
- Gridsync should no longer open a connection to the wormhole relay/rendezvous server when first initializing a `Wormhole` object, preventing the situation in which a second "clearnet" connection would idly persist (but remain unused) after adding a new connection via magic-wormhole over Tor -- big thanks to abmoka (82b13dff1b5fee62eaaff6d483da66bb792a73cd Akomba Labs) for reporting this issue! (Issue 169, PR 171)
- When running under a PyInstaller/frozen python interpreter, Gridsync/`xdg-open` should now correctly launch the user's browser when clicking links to URLs within the application (Issue 177, PR 180)
- On desktop environments that do not support a system tray, the system tray menu will be accessible instead from the bottom-right corner of the status panel (Issue 178; PR 182)

Added
- A rudimentary, text-based progress-indicator has been implemented, displaying the overall percentage of transferred/remaining bytes during folder-syncing operations (shown under the "Status" column of the folder-manager) (Issue 132, PR 142)
- `config.txt` now accepts a `logo_icon` application setting, allowing whitelabel/rebranded distributions to display a larger logo on the initial welcome screen (in place of the default application icon + description combination) (PR 150)
- `config.txt` now also accepts an optional `[message]` section with `title`, `text`, and (icon) `type` settings, allowing whitelabel/rebranded distributions to display a custom message to users upon starting the application (PR 161, 162)

Changed
- The Gridsync project no longer depends on [Travis-CI](https://travis-ci.org/) or [AppVeyor](https://www.appveyor.com/) for build-deployment and will now instead use dedicated virtual machines running on dedicated hardware for releases (PR 165). Currently, the following operating system versions should be considered supported (64-bit only):
- For GNU/Linux: glibc 2.17 and above -- including Debian 8+, Ubuntu 14.04+, CentOS 7+, and Fedora 29+
- For macOS: macOS 10.12 "Sierra" and above
- For Windows: Windows Server 2012R2, Windows 7 SP1, Windows 8.1, and Windows 10
- The interprocess mutex (used to prevent multiple instances of Gridsync from running at the same time) has been changed from a listening TCP port to a filesystem lock (using `fcntl` on UNIX-based systems), preventing false "Gridsync is already running" errors under some macOS 10.14 environments (Issue 138, PR 141)
- The Windows executable installer will now prompt the user whether install the application "for me only" or "for all users"; it is now possible to install Gridsync without requiring an administrator password (Issue 152, PR 153)
- The unnecessary Tcl/Tk dependency inserted by PyInstaller has been removed from Tahoe-LAFS bundles on Windows, reducing the resultant application filesize by about 10 MB (PR 154)
- The "Open Gridsync" system tray menu action is now always enabled but now will show/raise the "welcome" window in the event that no storage grids have been joined (Issue 147, PR 155)
- PyInstaller/binary bundles will now always use the Tahoe-LAFS executable included inside the application directory (as opposed to selecting a `tahoe` executable from the user's `PATH`) (PR 158)
- Gridsync will now use the Tahoe-LAFS web API directly when adding/creating new folders (instead of shelling out to the `tahoe` python CLI), resulting in significantly faster initial magic-folder creates and facilitating better error-handling (Issue 145, PR 160)
- If a magic-folder fails to get added/created for any reason, Gridsync will automatically retry that operation after a 3 second delay. It will only re-try once, however (and will display an error message in the event of a second failure) (Issue 145, PR 160)
- A warning/confirmation message-box will be displayed to the user in the event that they try to exit the application while a newly-added folder is still in the process of being created or if any existing folders are currently syncing (Issue 145, PR 160)
- The `[help]` section of `config.txt` is now optional; the "Browse Documentation" and "Report Issue" actions in the systray help submenu will now only appear if `docs_url` and `issues_url` respectively have been set (PR 164)

Fixed
- Gridsync will now display an error message -- rather than crash -- in the (rare) event that a user tries to restore a folder without actually possessing the correct capabilities to do so (Issue 143, PR 144)
- The desktop environment-specific file-manager should now properly launch when opening a folder under a PyInstaller build on Linux (Issue 146, PR 148)
- The environment-specified font should now correctly load when running a PyInstaller build on Linux (Issue 84)
- Gridsync will now refrain from trying to restart a tahoe client if that client is already in the proccess of stopping or starting, preventing needless tahoe restarts when adding new folders in quick succession (Issue 149, PR 151)
- On Windows, the application icon should no longer persist in the system tray after the application has exited (Issue 156, PR 157)
- The logic surrounding `tahoe` daemon restarts after adding folders has been improved; Gridsync will now wait until all known/queued linking events have completed before proceeding with a `tahoe stop` and will not attempt to restart unless at least one folder has been added/created successfully (Issue 145, PR 160)
- In the event that a magic-folder cannot be added/created, it will be removed immediately from the folder view/model in the UI (after displaying an error message); failed folders should no longer linger or appear stuck in a "Loading..." state and/or need to be removed manually (PR 160)
- A rare Qt-related crash (caused by Gridsync trying to update the mtime or size for a folder that has recently been removed) has been fixed (PR 160)
- In hopes of fighting off any ["Zombie Dragons"](https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2996), Gridsync will now restart the `tahoe` daemon after successfully leaving a magic-folder (PR 163)
- When permanently removing one or more magic-folders, Gridsync will now wait until all unlink operations have completed before rescanning the rootcap, preventing the situation in which a folder might re-appear in the UI as "Remotely stored" despite having just been removed (PR 163)

Added
- Tor integration (**EXPERIMENTAL**)
- Gridsync can now optionally tunnel outgoing connections through the Tor anonymity network; see [`docs/tor-integration.md`](https://github.com/gridsync/gridsync/blob/master/docs/tor-integration.md) (Issue 64, Issue 99, PR 82, PR 127, PR 129)
- Application preferences are now also accessible from the initial welcome screen
- A "Restore from Recovery Key" link/option is now available directly from the initial welcome screen (Issue 60)
- An Inno Setup Windows executable installer ("Gridsync-setup.exe") is now provided (Issue 35)
- Backspace/Delete key-presses can now be used to remove folders
- An "action" button/column has been added for each folder/row, making folder-specific actions accessible via left-click (Issue 89)
- A (very) basic "About"/version dialog has been added, accessible via the systray menu
- A "history" view has been added, displaying a chronological record of recent changes made to magic-folders and enabling per-file actions (Issue 92, PR 116, PR 124)
- Support for high-DPI "retina" displays has been enabled for macOS ".app" bundles (PR 116)
- In-app "help" buttons/dialogs have been added to invite-code widgets, providing additional information about "invite codes" and "Tor" (PR 129)
- macOS binary releases are now certified by Apple (signed by "Developer ID Application: Christopher Wood (6X3QVDWX28)"); users should no longer receive "unidentified developer" warnings from Gatekeeper when launching Gridsync (Issue 20)

Changed
- Due to upstream changes/deprecations with the Homebrew package manager and Qt5, the minimum "officially" supported version of macOS for Gridsync binary distributions has been increased from 10.10 ("Yosemite") to 10.11 ("El Capitan"). For users who have not yet upgraded or who are still using older hardware, however, a ["legacy"](https://github.com/gridsync/gridsync/releases) distribution of Gridsync has been provided (based off Qt 5.8 and tested to run on 2009-era hardware with versions of macOS as old as 10.9) (Issue 110)
- The version of Tahoe-LAFS included in Windows and Linux binary distrubutions has been upgraded to 1.13.0 (PR 108)
- macOS binary distributions will now include a more recent (but still unreleased) version of Tahoe-LAFS with numerous magic-folder-related bug-fixes and improvements -- thanks vu3rdd!
- Gridsync will now run as an "agent" application on macOS, accessible from the menu bar but no longer appearing in the Dock (Issue 86, PR 112, PR 114)
- A "person" overlay/embled will now be displayed over the icons of shared folders (PR 129, PR 133)
- Failure to decrypt a recovery key no longer requires re-importing the file to try again (Issue 60)
- Font sizes have been increased on macOS to match the equivalent weights on most Linux and Windows environments
- The dynamic action button inside invite code fields will now also update on window-enter cursor events (allowing, e.g., the "paste" button to become conveniently activated after copying an invite code to the clipboard from another window)
- The main/status window's title will now include the name of the currently-active grid
- The Preferences pane has been detached into a floating Preferences window with per-section "tabs" (Issue 117, PR 119)
- The MainWindow toolbar has been updated; text labels have been added beneath buttons and some actions have been re-organized (Issue 106, PR 120)
- The MainWindow status bar has been replaced with a "status panel", showing grid-related status information in a more compact manner (PR 116, PR 123)
- Various misc. UI elements (widgets, margins, fonts, etc.) have been adjusted on macOS and Windows to better match the underlying desktop environment (PR 125, PR 129)

Removed
- The "default" provider section of `config.txt` has been removed; organizations wishing to deploy a modified Gridsync client with pre-configured settings are encouraged to use a ["cheat code"](https://github.com/gridsync/gridsync/blob/master/docs/cheat-codes.md) instead
- The "Import from Recovery Key" option has been removed from the manual configuration screen (since this functionality is now available from the welcome screen)
- The "green lock" folder icon overlay has been removed (Issue 121, PR 122)

Fixed
- `tahoe.select_executable()` will now use an empty nodedir when checking tahoe instances for multi-magic-folder support (preventing potential inaccuracies caused, e.g., by a pre-existing/misconfigured `$HOME/.tahoe` nodedir)
- Tahoe subclients created from older versions of Tahoe-LAFS that only support "legacy" magic-folders will now correctly inherit the parent client's `servers.yaml` settings upon creation.
- The "Open Gridsync" systray menu action will correctly remain disabled until at least one grid has been succesfully joined
- Users will no longer be prompted to export a Recovery Key after restoring a connection from one
- Empty folders will no longer appear stuck in a "Loading" state (Issue 73)
- Gridsync will now shutdown more gracefully, avoiding qt5reactor-related hangs when exiting
- Subdirectory objects are now ignored when parsing magic-folders (avoiding [Tahoe-LAFS bug 2924](https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2924)) (PR 115)
- Newly joined grids will become available/selected immediately from the main window comboxbox (PR 126, PR 129)

Added
- Support for introducerless connections; Gridsync can now write storage fURLs received through invite messages directly to `$nodedir/private/servers.yaml`, bypassing the need to connect to an introducer node (Issue 65)
- Preliminary support for "cheat codes", allowing future users to enter a pre-given invite code to join a grid without the need to complete a full magic-wormhole exchange (Issue 54); see `docs/cheat-codes.md`

Changed
- Magic-folder invites now use the Tahoe web API directly to create member subdirectories (as opposed to shelling out to `tahoe magic-folde invite`) and will do so concurrently in the event of "batched" invites, resulting in significantly faster overall invite code creation when sharing folders (Issue 57)
- Gridsync will now prompt users for a grid name in the event that one is not provided inside an invite message

Fixed
- Rare crashes caused by the successive emitting of certain `pyqtSignal`s
- Overflow in "size" column caused by PyQt's C++ types (Issue 78) -- thanks yegortimoshenko!

Added
- "Start minimized" option to Preferences pane
- "Start automatically on login" option to Preferences pane (Issue 66)
- Error message when trying to join an already-existing grid (Issue 68)

Changed
- The application will no longer start in a "minimized" state by default (Issue 69)
- Updated qt5reactor to wake up less often, reducing idle CPU consumption -- thanks exarkun!

Fixed
- "Last modified" time will no longer update until after the first remote scan has completed, thereby preventing misleading mtimes (e.g., "48 years ago") from being displayed briefly on start (Issue 63).
- Invites received through the "Add Folder" button will no longer appear to "hang" when receiving an invite that does not contain a magic-folder join-code (Issue 67)
- Setup will now only prompt for a grid-rename if the introducer fURL received through the invite actually differs from that of the conflicting target nodedir (Issue 68)
- Setup will now actually try to fetch icon URLs provided inside invite messages