conflicts does not work if there is no dependencies

[humem (humem)]

The conflicts statement seems not to work if there is no dependencies in a Portfile. I will explain with an example.

darts and darts-clone ports conflict with each other. If darts-clone already exists, darts cannot be installed as expected. On the other hand, the installation procedure of darts-clone will start even if darts exists. One difference between the two ports is that darts-clone has no dependencies although darts has depends_lib.

Here is a log of the above example:

$ sudo port install darts-clone
--->  Fetching archive for darts-clone
--->  Attempting to fetch darts-clone-0.32g_0.darwin_11.x86_64.tbz2 from http://packages.macports.org/darts-clone
--->  Fetching darts-clone
--->  Verifying checksum(s) for darts-clone
--->  Extracting darts-clone
--->  Configuring darts-clone
--->  Building darts-clone
--->  Staging darts-clone into destroot
--->  Installing darts-clone @0.32g_0
--->  Activating darts-clone @0.32g_0
$ sudo port install darts      
--->  Computing dependencies for darts
Error: Unable to execute port: Can't install darts because conflicting ports are installed: darts-clone
To report a bug, see <http://guide.macports.org/#project.tickets>
$ sudo port uninstall darts darts-clone
--->  Deactivating darts-clone @0.32g_0
--->  Uninstalling darts-clone @0.32g_0
$ sudo port clean darts darts-clone
--->  Cleaning darts
--->  Cleaning darts-clone
$ sudo port install darts
--->  Computing dependencies for darts
--->  Fetching archive for darts
--->  Attempting to fetch darts-0.32_0.darwin_11.x86_64.tbz2 from http://packages.macports.org/darts
--->  Fetching darts
--->  Verifying checksum(s) for darts
--->  Extracting darts
--->  Applying patches to darts
--->  Configuring darts
--->  Building darts
--->  Staging darts into destroot
--->  Installing darts @0.32_0
--->  Activating darts @0.32_0
$ sudo port install darts-clone
--->  Fetching archive for darts-clone
--->  Attempting to fetch darts-clone-0.32g_0.darwin_11.x86_64.tbz2 from http://packages.macports.org/darts-clone
--->  Fetching darts-clone
--->  Verifying checksum(s) for darts-clone
--->  Extracting darts-clone
--->  Configuring darts-clone
--->  Building darts-clone
Error: Target org.macports.build returned: shell command failed (see log for details)
Log for darts-clone is at: /opt/local/var/macports/logs/_opt_macports-trunk_dports_devel_darts-clone/darts-clone/main.log
Error: Status 1 encountered during processing.
To report a bug, see <http://guide.macports.org/#project.tickets>

[ryandesign (Ryan Carsten Schmidt)]

You seem to be right. That is strange. See also libpixman and libpixman-devel. I'm pretty sure this used to work right before MacPorts 2; I'd think I would have noticed this before.

[drkp (Dan Ports)]

I noticed this a couple months ago (I thought I filed a ticket about it, but I guess I just mentioned it on IRC)

The problem is that the check for conflicts is done in mportdepends (I forgot why -- was because we want to check if any dependencies have conflicts?) and that gets skipped if the port has no dependencies for the appropriate phase.

It ought to be a pretty easy fix...

[drkp (Dan Ports)]

Fixed in trunk in r85382