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November 24, 2015 19:43
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Parse YAML from bash with sed and awk.
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development: | |
adapter: mysql2 | |
encoding: utf8 | |
database: my_database | |
username: root | |
password: | |
apt: | |
- somepackage | |
- anotherpackage |
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development_adapter=("mysql2") | |
development_encoding=("utf8") | |
development_database=("my_database") | |
development_username=("root") | |
development_apt+=("somepackage") | |
development_apt+=("anotherpackage") |
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#!/usr/bin/env bash | |
# | |
# vim: set ft=sh: | |
# | |
# Based on https://gist.github.com/pkuczynski/8665367 | |
parse_yaml() { | |
local prefix=$2 | |
local s | |
local w | |
local fs | |
s='[[:space:]]*' | |
w='[a-zA-Z0-9_]*' | |
fs="$(echo @|tr @ '\034')" | |
sed -ne "s|^\($s\)\($w\)$s:$s\"\(.*\)\"$s\$|\1$fs\2$fs\3|p" \ | |
-e "s|^\($s\)\($w\)$s[:-]$s\(.*\)$s\$|\1$fs\2$fs\3|p" "$1" | | |
awk -F"$fs" '{ | |
indent = length($1)/2; | |
vname[indent] = $2; | |
for (i in vname) {if (i > indent) {delete vname[i]}} | |
if (length($3) > 0) { | |
vn=""; for (i=0; i<indent; i++) {vn=(vn)(vname[i])("_")} | |
printf("%s%s%s=(\"%s\")\n", "'"$prefix"'",vn, $2, $3); | |
} | |
}' | sed 's/_=/+=/g' | |
} | |
parse_yaml config.yml |
How can I convert the prefix to uppercase (toupper) using printf in awk? Sorry, awk is not my strong suit.
I tried using a bash builtin ${string^^} but it doesn't work within the awk print
.
How can I convert the prefix to uppercase (toupper) using printf in awk? Sorry, awk is not my strong suit. I tried using a bash builtin ${string^^} but it doesn't work within the
awk print
.
Suggestion 1: use awk's toupper
(respect. tolower
) functions
printf("%s%s%s=(\"%s\")\n", "'"$prefix"'",vn, toupper($2), $3);
Suggestion 2: create a separate prefix variable all uppercase (not tested, ymmv)
local prefix=${2}
local prefix_upper=${2^^}
[...]
printf("%s%s%s=(\"%s\")\n", "'"$prefix_upper"'",vn, $2, $3);
The first suggestion works. The second didn't (macos awk). Thank you!
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this is ingenious.