'\" t
.TH "PORT\-ECHO" "1" "2014\-08\-15" "MacPorts 2\&.3\&.99" "MacPorts Manual"
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.SH "NAME"
port-echo \- Print the list of ports the argument expands to
.SH "SYNOPSIS"
.sp
.nf
\fBport\fR \fBecho\fR
     [[\fIportname\fR | \fIpseudo\-portname\fR | \fIport\-expressions\fR | \fIport\-url\fR]]
.fi
.SH "DESCRIPTION"
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\fBport echo\fR expands its argument list according to MacPorts\*(Aq rules and prints a list of ports that match the expression given as argument\&. It can be useful to see what a pseudo\-portname or a pseudo\-portname selector (see \fBport\fR(1)) expands to\&.
.sp
If \fBport echo\fR doesn\(cqt recognize an argument as port, it will still print it as\-is\&. You cannot use \fBport echo\fR to check whether a port exists:
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.if n \{\
.RS 4
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.nf
$ port echo nonexistentport
nonexistentport
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.if n \{\
.RE
.\}
.SH "EXAMPLES"
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Common use cases are:
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.if n \{\
.RS 4
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port echo depends:zlib
port echo inactive
port echo obsolete
port echo requested
port echo leaves
port echo category:^mail$
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.if n \{\
.RE
.\}
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Note that \fBecho\fR is usually \fInot\fR used to list outdated ports, since a separate action \fBport-outdated\fR(1) exists for that\&. \fBport outdated\fR has the advantage compared to \fBport echo outdated\fR that it gives the reason why MacPorts considers the port outdated\&.
.SH "SEE ALSO"
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\fBport\fR(1), \fBport-outdated\fR(1)
.SH "AUTHORS"
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(C) 2014 The MacPorts Project
Clemens Lang <cal@macports\&.org>
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