platform_tell: output JSON

Author: scivision

+stdlib/java_home.m

@@ -8,6 +8,8 @@
   h = '';
 end
 
+h = string(h);
+
 end
 
 %!assert(!isempty(java_home()))

+stdlib/platform_tell.m

@@ -1,35 +1,43 @@
 %% PLATFORM_TELL - Display information about the platform and environment
 
-function platform_tell()
+function json = platform_tell()
 
 r = matlabRelease();
-fprintf('Matlab: %s %s %s\n', r.Release, computer('arch'), stdlib.cpu_arch());
-
-fprintf('HDF5 %s\n', stdlib.h5get_version());
-fprintf('netCDF %s\n', stdlib.nc_get_version());
+raw = struct("matlab_release", r.Release, ...
+"matlab_arch", computer('arch'), ...
+"cpu_arch", stdlib.cpu_arch(), ...
+"hdf5", stdlib.h5get_version(), ...
+"netcdf", stdlib.nc_get_version());
 
 if stdlib.has_java()
-  fprintf('Java: %s %s  Home: %s\n', stdlib.java_vendor(), stdlib.java_version(), stdlib.java_home());
+  raw.java_vendor = stdlib.java_vendor();
+  raw.java_version = stdlib.java_version();
+  raw.java_home = stdlib.java_home();
 end
 
 if stdlib.has_dotnet()
-  fprintf('.NET: %s\n', stdlib.dotnet_version());
+  raw.dotnet_version = stdlib.dotnet_version();
 end
 
 pv = stdlib.python_version();
 if ~isempty(pv)
-  fprintf('Python: %d.%d.%d  Home: %s\n', pv(1), pv(2), pv(3), stdlib.python_home());
+  raw.python_version = sprintf("%d.%d.%d",pv(1), pv(2), pv(3));
+  raw.python_home = stdlib.python_home();
 end
 
 if ismac()
-  fprintf('Xcode CLT: %s\n', stdlib.xcode_version());
+  raw.xcode_version = stdlib.xcode_version();
 end
 
-for lang = ["C", "C++", "Fortran"]
+for lang = ["C", "Cpp", "Fortran"]
   co = mex.getCompilerConfigurations(lang);
+
   if ~isempty(co)
-    fprintf('%s compiler: %s %s\n', lang, co.ShortName, co.Version)
+    raw.("compiler_" + lang) = co.ShortName;
+    raw.("compiler_" + lang + "_version") = co.Version;
   end
 end
 
+json = jsonencode(raw, "PrettyPrint", true);
+
 end