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use pure bash to filter version candidates

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instead of awk
This commit is contained in:
Augusto Moura 2021-01-21 17:37:23 -03:00
parent e6ace0fca5
commit a82ac52b05
2 changed files with 30 additions and 40 deletions
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2
bin/list-all
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@ -8,5 +8,5 @@ source "$(dirname "$0")/../lib/utils.sh"
# Print
echo $(
# Only print the first column of candidates
print_index_tab | filter_version_candidates | awk -F'\t' '{ print $1 }' | tac
print_index_tab | filter_version_candidates | cut -f1 | tac
)

68
lib/utils.sh
View File

@ -1,3 +1,4 @@
#! /usr/bin/env bash
# Helper functions
# When in China, set $NODEJS_ORG_MIRROR:
@ -27,51 +28,40 @@ print_index_tab() {
curl --silent "${NODEJS_ORG_MIRROR}index.tab"
}
# Tab file needs to be piped as stdin
# Print all alias and correspondent versions in the format "$alias\t$version"
# Also prints versions as a alias of itself. Eg: "v10.0.0 v10.0.0"
# Also prints versions as a alias of itself. Eg: "v10.0.0\tv10.0.0"
filter_version_candidates() {
awk -F'\t' '
# First line is the headers for the columns
NR == 1 {
for (i = 1; i <= NF; i++) {
cols[cols_size++] = $i
}
local curr_line=""
local -A aliases
# Skip first line because we got all the information already
next
}
# Skip headers
IFS= read -r curr_line
# Add a global variable `record` with the current line version
# using the headers as fields
{
for (i = 1; i < NF; i++) {
record[cols[i - 1]] = $i
}
}
while IFS= read -r curr_line; do
# Just expanding the string should work because tabs are considered array separators
local -a fields=($curr_line)
{
# Version without the `v` prefix
vers = substr(record["version"], 2)
# Version without `v` prefix
local version="${fields[0]#v}"
# Lowercase lts codename, `-` if not a lts version
local lts="${fields[9],,}"
# We need to check if the lts alias is in a variable because multiple versions
# have the same alias, we want to print only the most recent
if (record["lts"] != "-") {
if [ "$lts" != - ]; then
# No lts read yet, so this must be the more recent
if [ -z "${aliases[lts]:-}" ]; then
printf "lts\t%s\n" "$version"
aliases[lts]="$version"
fi
# Check if lts is already printed, if not print it as version candidate and
# put it at the aliases map
if (!("lts" in aliases)) {
aliases["lts"] = vers
print "lts\t" vers
}
# No lts read for this codename yet, so this must be the more recent
if [ -z "${aliases[$lts]:-}" ]; then
printf "lts-$lts\t%s\n" "$version"
aliases[$lts]="$version"
fi
fi
lts_alias = "lts-" tolower(record["lts"])
if (!(lts_alias in aliases)) {
aliases[lts_alias] = vers
print lts_alias "\t" vers
}
}
print vers "\t" vers
}
'
printf "%s\t%s\n" "$version" "$version"
done
}