appimage downgrading

CHANGELOG.md

@@ -17,13 +17,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Minor UI improvements
 
 ### AppImage support
-- Search, install, uninstall and retrieve history of applications available in [AppImageHub](https://appimage.github.io)
-- Adds desktop entries (menu shortcuts) for the installed applications
-
-
-### AppImage support
-- Database from https://appimage.github.io
-- Search, install, uninstall
+- Search, install, uninstall, downgrade, launch and retrieve the applications history available in [AppImageHub](https://appimage.github.io)
+- Adds desktop entries ( menu shortcuts ) for the installed applications ( **~/.local/share/applications **)
 
 
 ## [0.6.2] 2019-10-02

README.md

@@ -90,7 +90,7 @@ You can change some application settings via environment variables or arguments
 - Let the disk cache always enabled so **bauh** does not need to dynamically retrieve some data every time you launch it.
 
 ### Flatpak support ( flatpak gem )
-- The user is able to search, install, uninstall, downgrade, laucnh and retrieve the applications history
+- The user is able to search, install, uninstall, downgrade, launch and retrieve the applications history
 
 ### Snap support ( snap gem )
 - The user is able to search, install, uninstall, refresh, launch and downgrade applications
@@ -104,7 +104,8 @@ will be pre-downloaded faster ( it does **NOT** modify your **pacman** settings
 - Automatically makes simple package compilation improvements
 
 ### AppImage support ( appimage gem )
--
+- The user is able to search, install, uninstall, downgrade, launch and retrieve the applications history available in [AppImageHub](https://appimage.github.io)
+- Adds desktop entries ( menu shortcuts ) for the installed applications ( **~/.local/share/applications **)
 
   a) if **MAKEFLAGS** is not set in **/etc/makepkg.conf** and **~/.makepkg.conf** does not exist,
 then a copy of **/etc/makepkg.conf** will be generated at **~/.makepkg.conf** defining MAKEFLAGS to work with

bauh/gems/appimage/controller.py

@@ -85,7 +85,41 @@ class AppImageManager(SoftwareManager):
         return res
 
     def downgrade(self, pkg: AppImage, root_password: str, watcher: ProcessWatcher) -> bool:
-        pass
+        versions = self.get_history(pkg)
+
+        if len(versions.history) == 1:
+            watcher.show_message(title=self.i18n['appimage.downgrade.impossible.title'],
+                                 body=self.i18n['appimage.downgrade.impossible.body'].format(bold(pkg.name)),
+                                 type_=MessageType.ERROR)
+            return False
+        elif versions.pkg_status_idx == -1:
+            watcher.show_message(title=self.i18n['appimage.downgrade.impossible.title'],
+                                 body=self.i18n['appimage.downgrade.unknown_version.body'].format(bold(pkg.name)),
+                                 type_=MessageType.ERROR)
+            return False
+        elif versions.pkg_status_idx == len(versions.history) - 1:
+            watcher.show_message(title=self.i18n['appimage.downgrade.impossible.title'],
+                                 body=self.i18n['appimage.downgrade.first_version'].format(bold(pkg.name)),
+                                 type_=MessageType.ERROR)
+            return False
+        else:
+            if self.uninstall(pkg, root_password, watcher):
+                old_release = versions.history[versions.pkg_status_idx + 1]
+                pkg.version = old_release['0_version']
+                pkg.url_download = old_release['2_url_download']
+                if self.install(pkg, root_password, watcher):
+                    self.cache_to_disk(pkg, None, False)
+                    return True
+                else:
+                    watcher.show_message(title=self.i18n['error'],
+                                         body=self.i18n['appimage.downgrade.install_version'].format(bold(pkg.version), bold(pkg.url_download)),
+                                         type_=MessageType.ERROR)
+            else:
+                watcher.show_message(title=self.i18n['error'],
+                                     body=self.i18n['appimage.downgrade.uninstall_current_version'].format(bold(pkg.name)),
+                                     type_=MessageType.ERROR)
+
+            return False
 
     def update(self, pkg: AppImage, root_password: str, watcher: ProcessWatcher) -> SystemProcess:
         pass

bauh/gems/appimage/model.py

@@ -35,8 +35,7 @@ class AppImage(SoftwarePackage):
         return True
 
     def can_be_downgraded(self):
-        # TODO
-        return False
+        return self.installed
 
     def get_type(self):
         return 'AppImage'

bauh/gems/appimage/resources/locale/en

@@ -7,4 +7,10 @@ appimage.info.url_download=File URL
 appimage.info.icon_path=icon
 appimage.history.0_version=version
 appimage.history.1_published_at=date
-appimage.history.2_url_download=File URL
+appimage.history.2_url_download=File URL
+appimage.downgrade.impossible.title=Impossible to downgrade
+appimage.downgrade.impossible.body={} has only one published version.
+appimage.downgrade.unknown_version.body=It was not possible to identify {} current version in its versions history
+appimage.downgrade.first_version={} is in its first published version
+appimage.downgrade.uninstall_current_version=It was not possible to uninstall the current version of {}
+appimage.downgrade.install_version=It was not possible to install the version {} ({})

bauh/gems/appimage/resources/locale/es

@@ -7,4 +7,10 @@ appimage.info.url_download=URL del archivo
 appimage.info.icon_path=icono
 appimage.history.0_version=versión
 appimage.history.1_published_at=fecha
-appimage.history.2_url_download=URL del archivo
+appimage.history.2_url_download=URL del archivo
+appimage.downgrade.impossible.title=Imposible revertir la versión
+appimage.downgrade.impossible.body={} solo tiene una versión publicada.
+appimage.downgrade.unknown_version.body=No fue posible identificar la versión actual de {} en su historial de versiones
+appimage.downgrade.first_version={} está en su primera versión publicada
+appimage.downgrade.uninstall_current_version=No fue posible desinstalar la versión actual de {}
+appimage.downgrade.install_version=No fue posible instalar la versión {} ({})

bauh/gems/appimage/resources/locale/pt

@@ -7,4 +7,10 @@ appimage.info.url_download=URL do arquivo
 appimage.info.icon_path=ícone
 appimage.history.0_version=versão
 appimage.history.1_published_at=data
-appimage.history.2_url_download=URL do arquivo
+appimage.history.2_url_download=URL do arquivo
+appimage.downgrade.impossible.title=Impossível reverter a versão
+appimage.downgrade.impossible.body={} tem somente uma versão publicada.
+appimage.downgrade.unknown_version.body=Não foi possível identificar a versão atual de {} no seu histórico de versões
+appimage.downgrade.first_version={} se encontra em sua primeira versão publicada
+appimage.downgrade.uninstall_current_version=Não foi possível desinstalar a versão atual de {}
+appimage.downgrade.install_version=Não foi possivel instalar a versão {} ({})