Issue #389 has been reported by mtjm.

----------------------------------------
Bug #389: [chcleanup] fails if a dependency of the PKGBUILD has unsatisfied 
dependencies
https://labs.parabola.nu/issues/389

Author: mtjm
Status: open
Priority: bug
Assignee: 
Category: 
Target version: 


This occurred when running libremakepkg for mips64el nepomuk-core:
<pre>==> Cleaning chroot...
:: Synchronizing package databases...
 repo is up to date
 libre is up to date
 core is up to date
 extra is up to date
 community is up to date
error: failed to prepare transaction (unexpected error)</pre>

bash -x output for chcleanup has shown this:
<pre>+ printf '==> Cleaning chroot...\n'
==> Cleaning chroot...
+ pacman -Sy
:: Synchronizing package databases...
 repo is up to date
 libre is up to date
 core is up to date
 extra is up to date
 community is up to date
+++ basename /clean
++ mktemp --tmpdir -d clean.XXXXX
+ TEMPDIR=/tmp/clean.BhpuJ
+ cp -a /var/lib/pacman/sync /tmp/clean.BhpuJ/
+ cleanup_log=/tmp/clean.BhpuJ/libretools-cleanup.log
+ pacman -b /tmp/clean.BhpuJ -Sp --print-format %n base-devel kdelibs 
poppler-qt taglib ffmpeg ebook-tools cmake automoc4 doxygen
error: failed to prepare transaction (unexpected error)
+ packages=($(comm -23 <(pacman -Qq | sort -u)                      <(sort -u 
"${cleanup_log}")))
++ comm -23 /tmp/sh-np-1377010478 /tmp/sh-np-4130644913
+++ pacman -Qq
+++ sort -u
+++ sort -u /tmp/clean.BhpuJ/libretools-cleanup.log
+ RET=0
+ [[ 236 != 0 ]]
+ msg2 'Removing %d packages' 236
+ local 'mesg=Removing %d packages'
+ shift
+ printf '  -> Removing %d packages\n' 236
  -> Removing 236 packages
+ false
+ pacman --noconfirm -Rn acl alsa-lib archlinux-keyring aspell attica attr 
autoconf automake automoc4 avahi bash binutils bison bzip2 ca-certificates 
cairo cdparanoia cloog cmake coreutils cracklib curl damageproto db dbus 
dbus-glib desktop-file-utils diffutils dirmngr docbook-xml docbook-xsl 
e2fsprogs enchant exiv2 expat fakeroot file filesystem findutils fixesproto 
flac flex fontconfig freeglut freetype2 gawk gcc gcc-libs gd gdbm gettext 
giflib glib2 glibc glu gmp gnupg gnutls gpgme grantlee graphite grep groff 
gstreamer0.10 gstreamer0.10-base gstreamer0.10-base-plugins gzip harfbuzz 
hicolor-icon-theme hspell hunspell hwids iana-etc icu ilmbase inputproto isl 
jasper js185 json-c kbd kbproto kdelibs-libre keyutils kmod krb5 less 
libarchive libassuan libasyncns libatasmart libcap libcups libdaemon libdatrie 
libdbusmenu-qt libdrm libexif libffi libgcrypt libgpg-error libgphoto2 
libgssglue libice libieee1284 libimobiledevice libiodbc libjpeg-turbo libksba 
libldap libltdl libmng libmpc 
 libnl libogg libpciaccess libplist libpng libpulse libqzeitgeist libsasl libsm 
libsndfile libssh2 libtasn1 libthai libtheora libtiff libtirpc libtool libusbx 
libutempter libvisual libvorbis libx11 libxau libxcb libxcursor libxdamage 
libxdmcp libxext libxfixes libxft libxi libxml2 libxmu libxrandr libxrender 
libxslt libxss libxt libxtst libxv libxxf86vm linux-libre-api-headers lzo2 m4 
make media-player-info mesa mesa-libgl mpfr ncurses net-snmp nettle nspr 
openexr-libre openssl orc p11-kit pacman pacman-mirrorlist-libre pam pambase 
pango parabola-keyring patch pciutils pcre perl phonon phonon-gstreamer 
pinentry pixman pkg-config pm-quirks pm-utils polkit polkit-qt procps-ng pth 
python python2 qca qt4 qtwebkit randrproto raptor rasqal readline recordproto 
redland renderproto run-parts sane scrnsaverproto sed shadow 
shared-desktop-ontologies shared-mime-info soprano sqlite strigi sudo 
sysfsutils systemd tar texinfo tzdata udisks2 upower usbmuxd util-linux 
v4l-utils videoproto virtuoso-
 base wayland which xcb-proto xdg-utils xextproto xf86vidmodeproto xorg-xset 
xproto xz zlib
checking dependencies...
warning: pacman is designated as a HoldPkg.
warning: glibc is designated as a HoldPkg.
:: HoldPkg was found in target list. Do you want to continue? [y/N] 
+ RET=1
+ rm -rf /tmp/clean.BhpuJ
+ exit 1</pre>

The problem is in "pacman -Sp --print-format %n poppler-qt": on x86_64 it finds 
poppler-qt4, on mips64el it fails since we haven't removed poppler-qt yet which 
needs an older version of poppler.

I think chcleanup should fail with a specific error message in this case, since 
the following build would fail if pacman cannot install the dependency.  Trying 
to remove all packages could need one too, unless it's obvious that it won't 
occur for other reasons than unsatisfied dependencies.




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