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<topic_start>
flutter snapcraft.yaml example
place the YAML file in your flutter
project under <project root>/snap/snapcraft.yaml.
(and remember that YAML files are sensitive to white space!)
for example:
the following sections explain the various pieces of the YAML file.
<topic_end>
<topic_start>
metadata
this section of the snapcraft.yaml file defines and
describes the application. the snap version is
derived (adopted) from the build section.
<topic_end>
<topic_start>
grade, confinement, and base
this section defines how the snap is built.
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<topic_start>
apps
this section defines the application(s) that exist inside the snap.
there can be one or more applications per snap. this example
has a single application—super_cool_app.
when a providing snap is installed, snapd will
generate security policy that will allow it to
listen on the well-known DBus name on the specified
bus. if the system bus is specified, snapd will also
generate DBus bus policy that allows ‘root’ to own
the name and any user to communicate with the
service. non-snap processes are allowed to
communicate with the providing snap following
traditional permissions checks. other (consuming)
snaps might only communicate with the providing
snap by connecting the snaps’ interface.
<topic_end>
<topic_start>
parts
this section defines the sources required to
assemble the snap.
parts can be downloaded and built automatically using plugins.
similar to extensions, snapcraft can use various plugins
(such as python, c, java, and ruby) to assist in the
building process. snapcraft also has some special plugins.
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<topic_start>
desktop file and icon
desktop entry files are used to add an application
to the desktop menu. these files specify the name and
icon of your application, the categories it belongs to,
related search keywords and more. these files have the
extension .desktop and follow the XDG desktop entry
specification version 1.1.
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<topic_start>
flutter super-cool-app.desktop example
place the .desktop file in your flutter project
under <project root>/snap/gui/super-cool-app.desktop.
notice: icon and .desktop file name must be the same as your app name in
yaml file!
for example:
place your icon with .png extension in your flutter
project under <project root>/snap/gui/super-cool-app.png.
<topic_end>
<topic_start>
build the snap
once the snapcraft.yaml file is complete,
run snapcraft as follows from the root directory
of the project.
to use the multipass VM backend:
to use the LXD container backend:
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<topic_start>
test the snap
once the snap is built, you’ll have a <name>.snap file
in your root project directory.
$ sudo snap install ./super-cool-app_0.1.0_amd64.snap –dangerous
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<topic_start>
publish
you can now publish the snap.
the process consists of the following:
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<topic_start>
snap store channels
the snap store uses channels to differentiate among
different versions of snaps.
the snapcraft upload command uploads the snap file to
the store. however, before you run this command,
you need to learn about the different release channels.
each channel consists of three components:
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<topic_start>
snap store automatic review
the snap store runs several automated checks against
your snap. there might also be a manual review,
depending on how the snap was built, and if there are
any specific security concerns. if the checks pass
without errors, the snap becomes available in the store.
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