[MacPorts] #56161: Improve handling of dependencies with incorrect case

[MacPorts]

#56161: Improve handling of dependencies with incorrect case
-------------------------+--------------------
 Reporter:  ryandesign   |      Owner:
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  base         |    Version:  2.4.99
 Keywords:               |       Port:
-------------------------+--------------------
 An unintended consequence of preventing the use of unknown subports
 (#34619) is that this new error message is also now seen when a port
 specifies a dependency on another port with the wrong case, for example
 `port:unixodbc` when it should have been `port:unixODBC`.

 Possible improvements to this situation would be to detect if the "wrong
 subport" is just a different case of the main port or of one of the
 subports, and if so, either

 1. silently correct the case,
 2. correct the case and print a warning that the case is wrong, or
 3. print an error that the case is wrong.

 Before I [changeset:53c002b6b73f9c8ea8982a1decf296ed86fb2c7c/macports-
 ports fixed the saga port's unixODBC dependency case] just now, I saw:

 {{{
 $ ~/macports/macports-infrastructure/jobs/port_binary_distributable.tcl -v
 saga
 unixODBC does not have a subport 'unixodbc'
     while executing
 "error "$portname does not have a subport '$supplied_subport'""
     (procedure "mportopen" line 64)
     invoked from within
 "mportopen $portInfo(porturl) [list subport $portName] $variantInfo"
     (procedure "infoForPort" line 10)
     invoked from within
 "infoForPort $aPort $variantInfo"
     (procedure "check_licenses" line 47)
     invoked from within
 "check_licenses $portName [array get variantInfo] $verbose"
     invoked from within
 "exit [check_licenses $portName [array get variantInfo] $verbose]"
     (file "/Users/rschmidt/macports/macports-
 infrastructure/jobs/port_binary_distributable.tcl" line 345)
 }}}

 But it's possible this is also just a bug in
 port_binary_distributable.tcl, like #55941.

--
Ticket URL: <https://trac.macports.org/ticket/56161>
MacPorts <https://www.macports.org/>
Ports system for macOS