Reproducible: Always Steps to Reproduce: 1. emerge --sync 2. USE="python" emerge avahi Actual Results: # python -c "import avahi" Traceback (most recent call last): File "<string>", line 1, in <module> ImportError: No module named avahi The __init__.py[c] file is missing: ls /usr/lib/python2.7/site-packages/avahi ServiceTypeDatabase.py ServiceTypeDatabase.pyc ServiceTypeDatabase.pyo Expected Results: Here is a usable python bindings installation with an __init__.py[c] file, taken from a Fedora box: $ ls /usr/lib/python2.7/site-packages/avahi/ __init__.py __init__.pyc __init__.pyo ServiceTypeDatabase.py ServiceTypeDatabase.pyc ServiceTypeDatabase.pyo
hmm; gentoo64 avahi # ebuild avahi-0.6.30-r1.ebuild merge gentoo64 avahi # ls /usr/lib64/python2.7/site-packages/avahi/ __init__.py __init__.pyc __init__.pyo ServiceTypeDatabase.py ServiceTypeDatabase.pyc ServiceTypeDatabase.pyo Can't replicate
Found the cause, a warning I didn't notice: "For proper python support you should also enable the dbus and gtk USE flags!" (..) "Building avahi-python: no (You need python, pygtk and python-dbus!)" So, the "python" use flag does not get honoured unless some other flags are also set! Shouldn't this fire a use flag conflict error instead of not building what is expected by the user? Also, I don't understand the dependency on gtk since pytho-avahi uses the glib/dbus bindings and not pygtk. (in a server environment, one may well want to use an application with avahi bindings without requiring X11 dependencies which pygtk brings...)
Further investigation shows that there are zero dependencies on pygtk for the python bindings. It only relies on python dbus, and dbus only needs glib. avahi-discover (which is built as part of "avahi") does require pygtk, but that's an application which should just be skipped when building bindings without pygtk.
avahi -python is compiling, this was installed days before, but USE=python doesn't go through today: libtool: install: warning: relinking `libdns_sd.la' libtool: install: (cd /portable/temp/portage/net-dns/avahi-0.6.30-r2/work/avahi-0.6.30/avahi-compat-libdns_sd; /bin/sh /portable/temp/portage/net-dns/avahi-0.6.30-r2/work/avahi-0.6.30/libtool --silent --tag CC --mode=relink x86_64-pc-linux-gnu-gcc -std=gnu99 -I.. "-DDEBUG_TRAP=__asm__(\"int \$3\")" -pthread -march=native -mtune=native -O3 -pipe -Wno-unused-but-set-variable -Wno-unused-variable -fstack-protector -std=c99 -Wall -W -Wextra -pedantic -pipe -Wformat -Wold-style-definition -Wdeclaration-after-statement -Wfloat-equal -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wredundant-decls -Wmissing-noreturn -Wshadow -Wendif-labels -Wpointer-arith -Wbad-function-cast -Wcast-qual -Wcast-align -Wwrite-strings -fdiagnostics-show-option -Wno-cast-qual -fno-strict-aliasing -version-info 1:0:0 -pthread ../avahi-common/libavahi-common.la ../avahi-client/libavahi-client.la -Wl,-O1 -Wl,--as-needed -o libdns_sd.la -rpath /usr/lib64 libdns_sd_la-compat.lo libdns_sd_la-txt.lo libdns_sd_la-unsupported.lo libdns_sd_la-warn.lo -inst-prefix-dir /portable/temp/portage/net-dns/avahi-0.6.30-r2/image/) libtool: install: /usr/bin/install -c .libs/libdns_sd.so.1.0.0T /portable/temp/portage/net-dns/avahi-0.6.30-r2/image//usr/lib64/libdns_sd.so.1.0.0 libtool: install: (cd /portable/temp/portage/net-dns/avahi-0.6.30-r2/image//usr/lib64 && { ln -s -f libdns_sd.so.1.0.0 libdns_sd.so.1 || { rm -f libdns_sd.so.1 && ln -s libdns_sd.so.1.0.0 libdns_sd.so.1; }; }) libtool: install: (cd /portable/temp/portage/net-dns/avahi-0.6.30-r2/image//usr/lib64 && { ln -s -f libdns_sd.so.1.0.0 libdns_sd.so || { rm -f libdns_sd.so && ln -s libdns_sd.so.1.0.0 libdns_sd.so; }; }) libtool: install: /usr/bin/install -c .libs/libdns_sd.lai /portable/temp/portage/net-dns/avahi-0.6.30-r2/image//usr/lib64/libdns_sd.la libtool: install: warning: remember to run `libtool --finish /usr/lib64' /usr/bin/install -c -m 644 dns_sd.h '/portable/temp/portage/net-dns/avahi-0.6.30-r2/image//usr/include/avahi-compat-libdns_sd' Making install in avahi-compat-howl Making install in . Making install in samples Making install in avahi-autoipd Making install in avahi-ui Making install in avahi-ui-sharp Making install in po installing de.gmo as /portable/temp/portage/net-dns/avahi-0.6.30-r2/image//usr/share/locale/de/LC_MESSAGES/avahi.mo /usr/bin/install -c -m 644 avahi-core.pc avahi-client.pc avahi-compat-libdns_sd.pc avahi-glib.pc avahi-gobject.pc avahi-qt4.pc '/portable/temp/portage/net-dns/avahi-0.6.30-r2/image//usr/lib64/pkgconfig' * ERROR: net-dns/avahi-0.6.30-r2 failed (install phase): * python_convert_shebangs(): '/portable/temp/portage/net-dns/avahi-0.6.30-r2/image/usr/bin/avahi-discover' does not exist * * Call stack: * ebuild.sh, line 85: Called src_install * environment, line 5803: Called python_convert_shebangs '2' '/portable/temp/portage/net-dns/avahi-0.6.30-r2/image/usr/bin/avahi-discover' * environment, line 3756: Called die * The specific snippet of code: * die "${FUNCNAME}(): '${argument}' does not exist"; * * If you need support, post the output of 'emerge --info =net-dns/avahi-0.6.30-r2', * the complete build log and the output of 'emerge -pqv =net-dns/avahi-0.6.30-r2'. * The complete build log is located at '/var/log/portage/net-dns:avahi-0.6.30-r2:20111228-132615.log'. * The ebuild environment file is located at '/portable/temp/portage/net-dns/avahi-0.6.30-r2/temp/environment'. * S: '/portable/temp/portage/net-dns/avahi-0.6.30-r2/work/avahi-0.6.30' >>> Failed to emerge net-dns/avahi-0.6.30-r2, Log file:
These USE flags work: net-dns/avahi-0.6.30-r2 USE="dbus gdbm gtk ipv6 mdnsresponder-compat python qt4 utils -autoipd -bookmarks -doc -gtk3 -howl-compat -introspection -mono -test" Before - not compiling - I had: -utils -ipv6 -gtk
The ebuild already has a ewarn for this in pkg_setup() function: if use python && ! use dbus && ! use gtk; then ewarn "For proper python support you should also enable the dbus and gtk USE flags!" fi I can see this being converted into a REQUIRED_USE when the ebuild is updated to EAPI=4 but there really is nothing wrong with it as-is.
Sorry if I did not make this clear, but there is still something wrong: as it is, it is impossible to install the avahi python bindings using the ebuild without installing gtk and all its dependencies despite the fact that those are totally unrelated, and more importantly: not at all required for using the bindings. Most other distros solve this issue by providing separate avahi-ui, avahi-ui-gtk etc (see Fedora and Debian for example). So, Gentoo should solve this by not building the gtk ui bits rather than installing a broken/unusable python package in that case. Whether this then becomes a glib use flag or something else is not for me to decide. Think of this as building: USE="-X" openssh If people were forced to have to USE="X" to get a working sshd... it would get fixed pretty quickly!
Can you re-open this ticket (renaming title if desired), or shall I create a new one?
Since I got no response, I created a new ticket with more specific information: https://bugs.gentoo.org/show_bug.cgi?id=399369
