if you execute the bootstrap stage with no internet connection, you get the following output: ``` [2020-03-10 19:18:46] lb bootstrap P: Setting up clean exit handler [2020-03-10 19:18:46] lb bootstrap_cache restore [2020-03-10 19:18:46] lb bootstrap_debootstrap P: Begin bootstrapping system... P: If the following stage fails, the most likely cause of the problem is with your mirror configuration or a caching proxy. P: Running debootstrap (download-only)... I: Retrieving InRelease I: Retrieving Release E: Failed getting release file http://deb.debian.org/debian/dists/buster/Release P: Begin unmounting filesystems... P: Saving caches... chroot: failed to run command ‘/usr/bin/env’: No such file or directory ``` the last line looked suspicious. investigating it turns out that there was a deficiency in the exit handler. when debootstrap fails to download what it needs due to lack of a connection, that failure due to `set -e` causes the Exit() handler to kick in. Part of this includes outputting the "Saving caches..." line, before then making a call to Save_package_cache(). That in turn runs the following command: ``` Chroot chroot "apt-get autoclean" || true ``` The Chroot() function includes a line starting with: ``` ${_LINUX32} chroot "${CHROOT}" /usr/bin/env ``` which is the source of the last output line. the reason we see this unexpected output is that with bootstrapping having failed, there is no /usr/bin/env within the chroot so it is bound to fail. the fact is, the exit handler has no business trying to pretty much anything that it does if the bootstrap_debootstrap stage has not completed. this implements such a restriction and thus resolves the problem of this unexpected and confusing output in the described situation. we will now see: ``` [2020-03-10 19:18:46] lb bootstrap P: Setting up clean exit handler [2020-03-10 19:18:46] lb bootstrap_cache restore [2020-03-10 19:18:46] lb bootstrap_debootstrap P: Begin bootstrapping system... P: If the following stage fails, the most likely cause of the problem is with your mirror configuration or a caching proxy. P: Running debootstrap (download-only)... I: Retrieving InRelease I: Retrieving Release E: Failed getting release file http://deb.debian.org/debian/dists/buster/Release ``` |
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data/debian-cd | ||
debian | ||
examples | ||
frontend | ||
functions | ||
manpages | ||
scripts | ||
share | ||
COPYING | ||
Makefile |