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Updated version checking. #18

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Updated version checking. #18

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80 changes: 66 additions & 14 deletions NPMK/NPMKverChecker.m
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Original file line number Diff line number Diff line change
Expand Up @@ -24,20 +24,72 @@ function NPMKverChecker()
% 1.0.2.0: January 10, 2018
% - Added a clickable URL to the prompt.
%

persistent new_version
gitHubURL = 'https://github.com/BlackrockMicrosystems/NPMK/releases/latest';

%% Check for the latest version fo NPMK
try
FIDv = fopen('Versions.txt');
verFile = fscanf(FIDv, '%s');
fclose(FIDv);
latestVersion = verFile(findstr('LATEST', verFile)+7:findstr('LATEST', verFile)+13);
gitHubPage = urlread(gitHubURL);
newVersionAvailable = findstr(latestVersion, gitHubPage);
if isempty(newVersionAvailable)
disp('A new version of NPMK may be available.');
fprintf('Please visit <a href="%s">GitHub NPMK Page</a> to get the latest version.\n', gitHubURL)
if isempty(new_version)
%% Check for the latest version fo NPMK
try
% Local copy
FIDv = fopen('Versions.txt');
verFile = fscanf(FIDv, '%s');
fclose(FIDv);
latestVersion = verFile(findstr('LATEST', verFile)+7:findstr('LATEST', verFile)+13);

% Remote copy
gitHubPage = urlread(gitHubURL);
gitVersion = regexp(gitHubPage, '\<title\>.*(\d+\.\d+\.\d+\.\d+).*\</title\>', 'tokens');
gitVersion = gitVersion{1}{1};

new_version = compare_semver(gitVersion, latestVersion) == -1;
catch
end
end

if new_version
disp('A new version of NPMK may be available.');
fprintf('Please visit <a href="%s">GitHub NPMK Page</a> to get the latest version.\n', gitHubURL)
end
end

function cmp = compare_semver(a, b)
%% COMPARE_SEMVAR: Compare two "semantic version" strings
% INPUT:
% - a, b: Semantic version strings (as char arrays)
% OUTPUT:
% - cmp: Comparison value (like C's strcmp)
% -1 if a is more recent than b
% 0 if a and b are the same
% 1 if b is more recent than a
% NOTES:
% - In brief, semantic versions are MAJOR.MINOR.PATCH (etc). These are
% slightly different from "regular" decimals, in that version 1.2 is
% newer than 1.1, but 17 minor releases older than 1.19
% - This doesn't yet handle pre-release or other metadata stuff

a = strsplit(a, '.');
b = strsplit(b, '.');

if length(b) > length(a)
tmp = a;
a=b;
b=tmp;
end

while length(a) > length(b)
b{end+1} = 0;
end
a = str2double(a);
b = str2double(b);

for ii=1:length(a)
if a(ii) > b(ii)
cmp = -1;
return
elseif a(ii) < b(ii)
cmp = 1;
return;
end
catch
end
end
cmp = 0;
end