How to code the checking of the version of an App ?

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Marc Servagent
Marc Servagent on 29 Jul 2020
Answered: Brian on 16 Nov 2021 at 13:13
Hello,
I made an App via AppDesigner. The App is shared via App Installer.
I woud like to code the following:
When the app is running, I would like to check the current version of the app, and check if more recent version of app exists.
How to code this ?
Many thanks
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Accepted Answer

Marc Servagent
Marc Servagent on 31 Jul 2020
The technical support team indicated me the answer, which allow to update the answer to my own question!
Attached is the function which allow to check the new version of the app, and hereafter is an example provided by the technical support team:
>> checkForNewVersion('C:\Users\%username%\Documents\MATLAB\Clock.mlappinstall','Clock')
ans =
logical 0
greetings!
  1 Comment
Adam Danz
Adam Danz on 31 Jul 2020
Did they provide a description of what the two inputs should be?

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More Answers (1)

Brian
Brian on 16 Nov 2021 at 13:13
I developed the below yesterday and it has seemed to work so far.
function ver = CheckVersion(~)
if isdeployed % If compiled and deployed
[~, result] = system('path');
p = char(regexpi(result, 'Path=(.*?);', 'tokens', 'once')); % Get run path
myDir=dir(fullfile(p,'..','appdata','components')); % Move to components folder and get all files
myDir=myDir(3:end); % Exclude '.' and '..'
validFile=myDir(datetime({myDir.date})==max(datetime({myDir.date}))); % Only look at most recent install, includes 'common' and 'platform'
appInfo=xml2struct(fullfile(validFile(1).folder,validFile(1).name)); % Import 'common' as struct from xml (requires xml2struct download)
ver=appInfo.componentData.component.componentVersion.Text; % Grab the version number as a char array
else
fullpath=mfilename('fullpath'); % Get run path
s=settings;
if ~isempty(strfind(fullpath,s.matlab.addons.InstallationFolder.ActiveValue)) % If the run path includes the addons install folder, it is run from the app bar
[p,~]=fileparts(fullpath); % Get the path
if isfolder(fullfile(p,'resources'))
xmlLocation=fullfile(p,'resources','addons_core.xml'); % Go to resources folder
appInfo=xml2struct(xmlLocation); % Import addons_core.xml as struct
ver=appInfo.addonCore.version.Text; % Grab the version number as a char array
else
ver='debug'; % This may be redundant with below. Left in to prevent errors just in case...
end
else % If run from MATLAB mlapp file
ver='debug';
end
end
end

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