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Development Team/Almanac/Activity Bundles: Difference between revisions

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.info file format, deprecate some parts, refer to specification in git
 
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== .info file format ==
== .info file format ==


See [https://github.com/sugarlabs/sugar-toolkit-gtk3/blob/master/src/sugar3/bundle/__init__.py sugar3/bundle] for the file format, with keys and values.
See [https://github.com/sugarlabs/sugar-toolkit-gtk3/blob/master/src/sugar3/bundle/__init__.py sugar3/bundle] for the latest bundle metadata specification.


.info files follow a key/value pair format, similar to the [http://www.freedesktop.org/wiki/Specifications/desktop-entry-spec fd.o desktop entry spec], but not conforming to it. An example is shown here:
This section below deprecated, but has some useful historical information that goes beyond what the specification needs.


[Activity]
Some additional comments on the key;
name = Browse
activity_version = 156
bundle_id = org.laptop.WebActivity
icon = activity-web
exec = sugar-activity webactivity.WebActivity -s
mime_types = image/png;image/gif;image/jpeg;text/html;text/uri-list;application/xhtml+xml;application/rss+xml;application/xml;text/css
license = GPLv2+
summary = Surf the world! Here you can do research, watch educational videos, take online courses, find books, connect with friends and more.
update_url = http://host.net/bundles/FooBar
tags = exploration;web
single_instance = no
max_participants = 4
repository = https://github.com/sugarlabs/browse-activity


A more detailed explanation of the valid properties follows:
name
: A 'name' key without a bracketed language code is the "en_US" localized name of the activity.


  [Activity]
  activity_version
: The activity.info file must begin with [Activity], and only that, on the first line of the file
: An activity should not use the value in source code, as it may be changed by developers and packagers.


name = Browse
  bundle_id
: This is the name is displayed in Sugar referring to the activity.  A 'name' key without a bracketed language code is the "en_US" localized name of the activity.  The activity.info file must have this key.
: The name should conform to the [http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-names D-Bus spec] - in particular, hyphens are not allowed.  It is recommended that [http://en.wikipedia.org/wiki/Java_package#Package_naming_conventions Java package naming conventions] are used when choosing bundle identifiers, to ensure uniqueness.  Briefly, your name should begin with the reversed domain name of an organization you belong to.
 
activity_version = 156
: Each activity.info file must have a "activity_version" key.  Example versions are 1, 1.2, 1.2.3, 1.2.3-peru, and 1.2.3~me.  Larger versions are considered "newer".  An activity should not use the value, as it may be changed by developers and packagers.  The value must be newer for newer activities.
 
host_version = 1
: This key is deprecated. This used to specify the version of the Sugar environment the activity is compatible with; however, it was never implemented.
 
  bundle_id = org.laptop.WebActivity
: This is the activity bundle identifier.  It is required. The name should conform to the [http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-names D-Bus spec] - in particular, hyphens are not allowed (although this wasn't enforced in earlier builds, see [http://dev.laptop.org/ticket/6226 Trac 6226]).  It is recommended that [http://en.wikipedia.org/wiki/Java_package#Package_naming_conventions Java package naming conventions] are used when choosing bundle identifiers, to ensure uniqueness.  Briefly, your name should begin with the reversed domain name of an organization you belong to.
: The reversed domain name part is supposed to be rooted in some actual DNS-rooted namespace.  You don't need to own this domain; you just need to have a reasonable claim on some ''unique'' name at that domain. There are several ways to derive one:
: The reversed domain name part is supposed to be rooted in some actual DNS-rooted namespace.  You don't need to own this domain; you just need to have a reasonable claim on some ''unique'' name at that domain. There are several ways to derive one:
:* If your email address is ''yourname''@''somemailhost''.com, then you could use ''com.somemailhost.yourname''.''YourActivity''.
:* If your email address is ''yourname''@''somemailhost''.com, then you could use ''com.somemailhost.yourname''.''YourActivity''.
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: In the Python bindings, the bundle_id is also used as the activity's default service type when the activity is shared on the network.  To determine this type, the distinct parts (separated by the '.' character) are reversed, any '.' is replaced by a '_' character, and the type is prefixed by a '_' character.  So in this example, the default service type would be "_WebActivity_laptop_org".
: In the Python bindings, the bundle_id is also used as the activity's default service type when the activity is shared on the network.  To determine this type, the distinct parts (separated by the '.' character) are reversed, any '.' is replaced by a '_' character, and the type is prefixed by a '_' character.  So in this example, the default service type would be "_WebActivity_laptop_org".


  license = GPLv2+
  license
: This field names the licenses used for the activity bundle (the binary .xo file).  For multiple licenses, separate them with semicolons ";".  Otherwise, the value should conform to the same guidelines as the [http://fedoraproject.org/wiki/Packaging/LicensingGuidelines#License:_field <code>License:</code> field] of an RPM package; consult the [http://fedoraproject.org/wiki/Packaging/LicensingGuidelines Fedora Licensing Guidelines] for more information.  A 'license' field naming an entry or entries in the "Good Licenses" table at [http://fedoraproject.org/wiki/Licensing Fedora's Licensing list] is required for any activities distributed by Sugar Labs.
: This field names the licenses used for the activity bundle (the "binary" .xo file).  For multiple licenses, separate them with semicolons ";".  Otherwise, the value should conform to the same guidelines as the [http://fedoraproject.org/wiki/Packaging/LicensingGuidelines#License:_field <code>License:</code> field] of an RPM package; consult the [http://fedoraproject.org/wiki/Packaging/LicensingGuidelines Fedora Licensing Guidelines] for more information.  A 'license' field naming an entry or entries in the "Good Licenses" table at [http://fedoraproject.org/wiki/Licensing Fedora's Licensing list] is required for any activities distributed by Sugar Labs.


  icon = activity-web
  icon
: It points to the activity's icon.  The icon is looked up in the activity bundle's 'activity' directory (the same directory the activity.info file is in).  It cannot contain a path.  When searching for the icon in the activity bundle's 'activity' directory, only a file with the icon name and the extension '.svg' will be looked for.  This property is required unless 'show_launcher' is 'no' (see below).
: The icon is looked up in the activity bundle's 'activity' directory (the same directory the activity.info file is in).  It cannot contain a path.  When searching for the icon in the activity bundle's 'activity' directory, only a file with the icon name and the extension '.svg' will be looked for.


  exec = sugar-activity webactivity.WebActivity -s
  exec
: The exec key specifies the executable which [[Sugar]] runs to start the activity instances. Environment variables given on the exec line are expanded. Executable files should be placed into the bin/ directory in the bundle. It should support the following arguments:
: The exec key specifies the executable which [[Sugar]] runs to start the activity instances. Environment variables given on the exec line are expanded. Executable files should be placed into the bin/ directory in the bundle. It should support the following arguments:


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Python activities should generally use the generic sugar-activity executable. Other activities need to adhere to the [[olpc:Low-level Activity API]].
Python activities should generally use the generic sugar-activity executable. Other activities need to adhere to the [[olpc:Low-level Activity API]].


mime_types = application/pdf;image/tiff
  tags
: List of mime types supported by the activity, separated by semi colons. It's used when opening a file from the web or to present to the user a list of activities which can open a certain journal object.
 
show_launcher = yes
: This key is optional.  If not present, or if present with a value of "yes", the activity is shown with its icon in the [[Sugar]] panel launcher and a valid 'icon' key/value pair is required.  If specified with a value of "no", the activity is not shown in the [[Sugar]] panel launcher, and the 'icon' key is not required.
 
update_url = ...
 
: URL to retrieve update information; implemented in [http://dev.laptop.org/ticket/4951 #4951].  The software update control panel will attempt to look for information about the latest version of the activity by fetching the given url with first the core OS build number, then the release number, then the release major version number appended, then finally as-is.  (For example, if your update URL tag has the value 'http://host.net/bundles/FooBar' and you are currently running release 8.1.1 (core OS 708), the following URLs will be tried, in this order: http://host.net/bundles/FooBar/708, http://host.net/bundles/FooBar/8.1.1, http://host.net/bundles/FooBar/8.1, http://host.net/bundles/FooBar .)  The contents of the URLs should be in the [[olpc:Activity microformat]].  If no update_url is specified, http://wiki.laptop.org/go/Activities will be used.  See [[olpc:Software updater]] for more information.
 
  tags = exploration;web
: Tags give more context in which to place the activity. This is used to allow users to find activities more easily in the journal, the home view, [http://activities.sugarlabs.org http://activities.sugarlabs.org], etc.
: Tags give more context in which to place the activity. This is used to allow users to find activities more easily in the journal, the home view, [http://activities.sugarlabs.org http://activities.sugarlabs.org], etc.


  single_instance = yes
  single_instance
: This key is optional. If not present, or if present with a value of "no", multiple instances of the activity can be launched at once. If present with a value of "yes", then only one instance of the activity will be open at any one time. This key was added in order to flag activities that use resources that cannot be shared.
: Added to flag activities that use resources that cannot be shared, such as a camera.
 
max_participants = 4
: This key is optional. If not present, or if present with a value of <=1, the activity is not shared. Otherwise, it limits the number of participants who can join a shared activity. Note that setting max_participants in activity.py is deprecated.


  summary = ...
  max_participants
: A short summary of the activity is displayed in the List View.
: Setting max_participants in activity.py is possible, but deprecated.


  repository = https://...
  repository
: The URL of the master git repository for the activity, for use by {{code|git clone}}. Since activities are not all hosted in a single repository, it is important to include a link so that users can readily find the activity. Some git hosting services allow the URL to be used by web browser as well as {{code|git clone}}.
: The URL of the master git repository for the activity, for use by {{code|git clone}}. Since activities are not all hosted in a single repository, it is important to include a link so that users can readily find the activity. Some git hosting services allow the URL to be used by web browser as well as {{code|git clone}}.


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