MathworksUpgrade with R2025a too [skip ci]

Author: scivision

scripts/MatlabReleaseUpgrade.m

@@ -1,19 +1,81 @@
-disp(matlabRelease())
+%% Finds the program "MathWorksUpdateInstaller" used to check for Matlab updates.
+%
+% future: programmatic update is planned for the "mpm" program:
+% https://github.com/mathworks-ref-arch/matlab-dockerfile/issues/129#issuecomment-2783047083
 
-r = fullfile(matlabroot, "bin", computer("arch"));
-mustBeFolder(r)
+function MatlabReleaseUpgrade()
+
+cmd = getUpgradePath();
+
+fprintf("Matlab upgrade program found:\n\n%s\n\n", cmd)
+
+end
+
+
+function cmd = getUpgradePath()
 
-cmd = fullfile(r, "MathWorksUpdateInstaller");
+name = "MathWorksUpdateInstaller";
 if ispc()
-  cmd = cmd + ".exe";
+  name = name + ".exe";
+end
+
+if isMATLABReleaseOlderThan('R2025a')
+  cmd = legacy_update_path(name);
+else
+  cmd = new_update_path(name);
 end
 
 if ~isfile(cmd)
-  if isMATLABReleaseOlderThan('R2025a')
-    error("Did not find upgrade program at %s", cmd)
-  else
-    error("Matlab R2025a changed the upgrade process, use the GUI.")
+  error("Did not find upgrade program at %s", cmd)
+end
+
+end
+
+
+function cmd = legacy_update_path(name)
+
+r = fullfile(matlabroot, "bin", computer("arch"));
+mustBeFolder(r)
+cmd = fullfile(r, name);
+
+end
+
+
+function cmd = new_update_path(name)
+
+arch = computer("arch");
+
+if ismac()
+  bin_head = fullfile(getenv("HOME"), "Library/Application Support/MathWorks");
+  if ~isfolder(bin_head)
+    bin_head = "/Library/Application Support/MathWorks";
   end
+  bin_tail = fullfile("bin", "MathWorksServiceHost.app/Contents/Frameworks/bin", arch);
+elseif ispc()
+  bin_head = fullfile(getenv("LOCALAPPDATA"), "MathWorks");
+  bin_tail = fullfile("bin", arch);
+else
+  bin_head = " ~/.MathWorks";
+  bin_tail = fullfile("bin", arch);
 end
 
-fprintf("Run this command in system Terminal to check for Matlab upgrade:\n\n%s\n\n", cmd)
+mustBeFolder(bin_head)
+
+glob = fullfile(bin_head, "ServiceHost/v*", bin_tail, name);
+match = dir(glob);
+if isempty(match)
+  error('could not find program with %s', glob)
+end
+folders = string(match.folder);
+% extract version number from string array of folders
+pattern = lookBehindBoundary("\v") + digitsPattern(4)  + lookAheadBoundary(".");
+pv = extract(folders, pattern);
+rel = matlabRelease().Release;
+i = contains(rel, pv);
+if ~any(i)
+  error('could not find program %s corresponding to %s', glob, rel)
+end
+
+cmd = fullfile(folders(i), name);
+
+end