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modalias.prov: group modalias lines by length

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On my machine, out of 2604 modules, this reduces number of
"provides" items by ~800 (to 12689 items).

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
This commit is contained in:
Denys Vlasenko 2023-05-07 17:29:18 +02:00
parent c2b1f3e458
commit 7cd7d838cf
1 changed files with 8 additions and 3 deletions
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modalias.prov
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@ -51,14 +51,14 @@ print_modaliases() {
# replace with
# modalias(pci:v0000168Cd0000002[3479]sv*sd*bc*sc*i*)
combine_modaliases() {
local tag class variants="" pos="" n
local unused_len tag class variants="" pos="" n
# Due to set -e, we can exit with exitcode 1 on read EOF
# and this makes our caller think we failed. "|| return 0" prevents this:
read class || return 0
IFS=' ' read unused_len class || return 0
# For each line after the first...
while read tag; do
while IFS=' ' read unused_len tag; do
# For each char in prev line...
for ((n=0; n<${#class}; n++)); do
# If aaaNbbb = aaaMbbb and N isn't "*"
@ -95,6 +95,11 @@ for module in $(grep -E '/lib/modules/.+\.ko(\.gz|\.bz2|\.xz|\.zst)?$') "$@"; do
/sbin/modinfo -F alias "$module" \
| sed -nre "s,[^][0-9a-zA-Z._:*?/-],_,g; s,(.+),modalias(\\1)$modver,p"
# Below: combining code can only possibly combine lines of equal length.
# Prepend line lengths before sort, so that same-length lines end up next
# to each other. (The lengths are discarded by combine_modaliases).
done \
| { while read line; do echo "${#line} $line"; done } \
| LC_ALL=C sort -u \
| combine_modaliases