I struggled for a couple of hours on just the basics of creating a package and getting it found. Here is the bare minimum of what I had to do to create a new package called FooBar:
- Create a package file called FooBar.tcl.
- Populate that file with the package code, following the conventions in William Duquette's tutorial on 'Namespaces and Packages' [L1 ].
- Change directories into the directory where FooBar.tcl resides, and do this
echo pkg_mkIndex -verbose . FooBar.tcl | tclsh8.4
which creates a pkgIndex.tcl file so that "package require" works. tclsh8.4 should be changed to the location of where your tclsh executable resides, but this worked on Tcl 8.4.1.
- Make sure TCLLIBPATH is exported in the wrapper shell script that invokes tclsh on your Tcl script. I used a wrapper script because I wanted to change the environment to point to a more recent build of Tcl and Tk that reside in a different directory than in their standard locations.
- Inside the script that needs the FooBar package, have it require
the package:
package require FooBar 1.0
where the 1.0 corresponds to the package provide command that should
be inside the FooBar.tcl file.