I have not used "port list" or "port echo" very often.
Now that I'm looking at them, I'm confused about echo's behavior.
I have zlib installed:
$ port installed zlib
The following ports are currently installed:
zlib @1.2.3_2+universal (active)
"port list zlib" shows the name, version and category:
$ port list zlib
zlib @1.2.3 archivers/zlib
"port echo zlib" shows the name only:
$ port echo zlib
zlib
But "port echo installed" shows the name and version, revision and
variants:
$ port echo installed | grep ^zlib
zlib @1.2.3_2+universal
Why does "echo" behave differently depending on whether zlib was
specified implicitly via the "installed" pseudo-port, or explicitly
on the command line?
I guess what's happening is that "installed" is expanding to not only
the names of the installed ports but also their version, revision and
variants, which I can even fake:
$ port echo zlib @1.0_0+foo+bar
zlib @1.0_0+bar+foo
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