root/build-tools/deb-utils.sh
Davlet Panech 0f3670fe64 debian: port helm chart script to debian
* build-helm-charts.sh:
  - auto-detect $OS
  - process DEB files on Debian

* deb-utils: new file with utilities for working with binary DEB files

* tox.ini: run unit tests for deb-utils

TESTS
========================================

Run script on CentOS and make sure the generated tarball's contents are
the same as before the patch.

Run script on Debian and make sure the generated tarball's contents look
reasonable.

Story: 2009897
Task: 45293

Depends-On: https://review.opendev.org/c/starlingx/openstack-armada-app/+/840561
Change-Id: Icbcb0bb7b47f623fac8d0851687423396edb5747
Signed-off-by: Davlet Panech <davlet.panech@windriver.com>
2022-05-10 17:13:13 -04:00

101 lines
2.4 KiB
Bash

# bash
# vim: set syn=sh:
__DEB_UTILS_DIR=$(readlink -f "$(dirname "${BASH_SOURCE[0]}")")/deb-utils
#
# Usage: __deb_get_section DEB_FILE {control|data}
#
# Uncompress and print the specified section to STDOUT in tar format.
# You should pipe it to "tar" to be useful.
#
function __deb_get_section {
local deb_file="$1"
local section="$2"
# find $section.tar.{gz,bz2,xz}
local section_entry
section_entry="$(
ar t "$deb_file" | \grep "^$section[.]" || true
)" || return 1
if [[ -z "$section_entry" ]] ; then
echo "$deb_file: couldn't find ${section}.*" >&2
return 1
fi
# untar it to stdout
local uncompress
case "${section_entry#${section}.}" in
tar.gz | tgz) uncompress="gunzip" ;;
tar.bz2) uncompress="bunzip2" ;;
tar.xz) uncompress="unxz" ;;
*)
echo "$deb_file: unsupported archive format $section_entry" >&2
return 1
esac
ar p "$1" "$section_entry" | $uncompress
check_pipe_status
}
#
# Usage: deb_get_control DEB_FILE
#
# Print the control file from the specified DEB package
#
function deb_get_control {
__deb_get_section "$1" control | tar -O -x ./control
check_pipe_status
}
#
# Usage: deb_extract_content DEB_FILE [--verbose] [PATHS_IN_ARCHIVE...]
#
# Extract deb package content to current directory
#
function deb_extract_content {
__deb_get_section "$1" data | tar -x
check_pipe_status
}
#
# Usage: deb_get_field KEY...
#
# Read a debian control file from STDIN, find the specified fields
# and print their values on STDOUT. With multiple fields, their values
# will be merged in the output w/no separators.
#
# See: https://www.debian.org/doc/debian-policy/ch-controlfields.html
#
function deb_get_field {
${PYTHON3:-python3} "${__DEB_UTILS_DIR}/deb_get_field.py" "$@"
}
#
# Usage: deb_get_simple_depends
#
# Read debian control file from STDIN, then print its immediate runtime
# dependencies to STDOUT, one per line, stripping any conditions and
# operators, e.g.:
#
# ...
# Depends: aaa, bbb [!amd64], ccc | ddd (>= 1.0)
# ...
#
# will be converted to
#
# aaa
# bbb
# ccc
# ddd
#
function deb_get_simple_depends {
local raw_depends
raw_depends=$(deb_get_field 'Pre-Depends' 'Depends') || return 1
echo $raw_depends \
| tr ',|' '\n' \
| sed -r 's/^\s*([^[:space:](><=[]+).*$/\1/' \
| grep -v -E '^\s*$' \
| sort -u
}