On Saturday, 12 February 2022 at 22:50:10 UTC, briang wrote:
> On Friday, February 11, 2022 at 10:35:00 AM UTC-8, snosniv wrote:
> > I have a simple batch file which invokes Java to run a conversion algorithm, this works just fine, but I can't seem to get it work within Tcl.
> >
> > batch file is:
> >
> > cd c:/Users/Downloads/Fit_files
> > java -jar C:\Users\Downloads\__Installation_files\FitSDKRelease_21.67.00\java\FitCSVTool.jar -b C:\Users\Downloads\Fit_files\FIT2CSV\INFILE.fit C:\Users\Downloads\Fit_files\FIT2CSV\OUTFILE.csv
> >
> > But I can't seem to invoke Java from within Tcl?
> > What do I need to do please?
> You have to take care with file path names in Tcl. The syntax for a pathname is different from a cmd shell. The backslash character (\) is used as an escape character, so in Tcl, to use it in a path name, the character must be escaped:
>
> java -jar c:\\Users\\Downloads\\__Installation_files\\FitSDKRelease_21.67.00\\java\\FitCSVTool.jar -b C:\\Users\\Downloads\\Fit_files\\FIT2CSV\\INFILE.fit C:\\Users\\Downloads\\Fit_files\FIT2CSV\OUTFILE.csv
>
> Or you can essentially escape the entire path using braces ({}):
> java -jar {C:\Users\Downloads\__Installation_files\FitSDKRelease_21.67.00\java\FitCSVTool.jar} -b {C:\Users\Downloads\Fit_files\FIT2CSV\INFILE.fit} {C:\Users\Downloads\Fit_files\FIT2CSV\OUTFILE.csv}
> Or you can use forward slashes (/):
> java -jar C:/Users/Downloads/__Installation_files/FitSDKRelease_21.67.00/java/FitCSVTool.jar -b C:/Users/Downloads/Fit_files/FIT2CSV/INFILE.fit C:/Users/Downloads/Fit_files/FIT2CSV/OUTFILE.csv
>
> Of course in order to run any external program, the [exec] command should be used:
>
> exec java -jar ...
>
> To capture any return values, use the [set] command:
>
> set return_value [exec java -jar ...]
>
> Also, you can verify that Tcl can find the program using the [autoexec_ok] command:
> if {[autoexec_ok java] ne ""} {
> set return_value [exec java -jar ...]
> }
>
> -Brian
Ah, hadn't thought about the escape, Doh. Thanks for the tip (I haven't dabbled in Tcl for a few years since I retired, but have something at home I want to do).