ct-ng.comp
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Tue Dec 13 23:32:39 2011 +0100 (2011-12-13)
changeset 2807 4193d6e6a174
parent 1876 a6a4beab3125
child 2988 a57b8a45ea26
permissions -rw-r--r--
scripts: fix dumping execution backtrace

Dumping the backtrace has been broken since changeset #652e56d6d35a:
scripts: execute each steps in a subshell

We can spawn sub-sub-shells in some cases.

The way the fault handler works is to dump the backtrace, but to avoid
printing it once for every sub-shell (which could get quite confusing),
it simply exits when it detects that it is being run in a sub-shell,
leaving to the top-level shell the work to dump the backtrace.

Because each step is executed in its own sub-shell, the variable arrays
that contain the step name, the source file and line number, are lost
when exiting the per-step sub-shell.

Hence, the backtrace is currently limited to printing only the top-level
main procedure of the shell.

Fix this thus:
- when dumping the bckatraces for the steps & the functions, remember
it was dumped, and only dump it if it was not already dumped
- at the top-level shell, print the hints

Also, rename the top-level step label.

Reported-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
     1 # To be sourced
     2 
     3 _ct-ng () {
     4     local cur prev samples show_samples actions steps start_steps stop_steps ct_ng_opts vars
     5     COMPREPLY=()
     6     cur=$(_get_cword)
     7     prev=${COMP_WORDS[COMP_CWORD-1]}
     8 
     9     samples=$( "${COMP_WORDS[0]}" list-samples-short 2>/dev/null )
    10     show_samples=$(echo "${samples}" |sed -r -e 's/(^| )/\1show-/g;')
    11     build_samples=$(echo "${samples}" |sed -r -e 's/(^| )/\1build-/g;')
    12 
    13     steps=$(${COMP_WORDS[0]} list-steps 2>/dev/null |awk '$1 == "-" { print $2; }')
    14     start_steps=$(echo "${steps}" |sed -r -e 's/($| )/\1+/;')
    15     stop_steps=$(echo "${steps}" |sed -r -e 's/(^| )/+\1/;')
    16 
    17     actions='help menuconfig oldconfig saveconfig extractconfig
    18              build build. build-all build-all.
    19              wiki-samples list-samples list-samples-short list-steps
    20              show-tuple show-all show-config
    21              clean distclean updatetools
    22              tarball version'
    23 
    24     vars="RESTART= STOP= PREFIX= V="
    25 
    26     ct_ng_opts="${samples} ${show_samples} ${build_samples}
    27                 ${steps} ${start_steps} ${stop_steps}
    28                 ${actions} ${vars}"
    29 
    30     COMPREPLY=($(compgen -W "${ct_ng_opts}" -- "${cur}"))
    31     return 0
    32 }
    33 complete -F _ct-ng ct-ng