Re: Hwo to debug and teacking builds?

[Hartmut Goebel <h.goebel@crazy-compilers.com>]

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Hello,

thank you very much for these snippets. I'm a lazy guy :-) so I wrapped
this into a script, which starts a new bash with this environment (see
attachment). Maybe this could be enhanced using guix mechanisms?
Suggestions are welcome.

Usage:

./pkg-env  # go into latest failed build - very convenient :-)
./pkg-env  some-package # go into latest failed build of this package
./pkg-env /tmp/guix-build-some-package-1.4.01.drv-1 # go into this directory

> That would probably make a good “Debugging Build Failures” section.

Absolutely!

-- 
Regards
Hartmut Goebel

| Hartmut Goebel          | h.goebel@crazy-compilers.com               |
| www.crazy-compilers.com | compilers which you thought are impossible |


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#!/bin/bash
# Copyright © 2017 Hartmut Goebel <h.goebel@crazy-compilers.com>
# License: GNU Public License v3.0 or (at your choice) later

PACKAGE="${1}"
if [ -z "${PACKAGE}" ] ; then
    PACKAGE=$(ls -td /var/tmp/guix-build-*.drv-* /tmp/guix-build-"$PACKAGE"-* 2>/dev/null | head -1)
    echo >&2 "No package name given, using $PACKAGE"
elif [ "${PACKAGE#/var/tmp/}" = "$PACKAGE" ] ; then
    PACKAGE=$(ls -td /var/tmp/guix-build-"$PACKAGE"-* /tmp/guix-build-"$PACKAGE"-* 2>/dev/null | head -1)
fi

if [ ! -d "$PACKAGE" ] ; then
    echo >&2 "Not found: $PACKAGE"
    exit 10
fi

#echo "Using $PACKAGE"

# TODO: Support containers:
#  guix environment -C foo --ad-hoc strace gdb
#  rm /bin/sh           # to be really like in the guix-daemon environment

inifile=$(mktemp)
cat > $inifile <<EOF
cd $PACKAGE
source $PACKAGE/environment-variables 
set +x
cd \$(find . -maxdepth 1 -mindepth 1 -type d 2>/dev/null) .
echo \$PWD
EOF

#echo '------------' ; cat $inifile ; echo '------------'
env -i HOME=/tmp bash --noprofile --init-file $inifile

rm -f $inifile