コード

tsv2json.jq

(env.HEADER|split("\t")) as $header
| [ $header, split("\t") ]
| transpose
| map({(.[0]): .[1]})
| add

tsv2json.sh

# !/bin/bash
set -ue

read HEADER
export HEADER
jq -c -R -f tsv2json.jq

適当なtsvを

bash

$ { printf "c1\nc2\nc3\n"; seq -f '%04g' 30; } | paste - - -
c1	c2	c3
0001	0002	0003
0004	0005	0006
0007	0008	0009
0010	0011	0012
0013	0014	0015
0016	0017	0018
0019	0020	0021
0022	0023	0024
0025	0026	0027
0028	0029	0030

変換

bash

$ { printf "c1\nc2\nc3\n"; seq -f '%04g' 30; } | paste - - - | bash tsv2json.sh
{"c1":"0001","c2":"0002","c3":"0003"}
{"c1":"0004","c2":"0005","c3":"0006"}
{"c1":"0007","c2":"0008","c3":"0009"}
{"c1":"0010","c2":"0011","c3":"0012"}
{"c1":"0013","c2":"0014","c3":"0015"}
{"c1":"0016","c2":"0017","c3":"0018"}
{"c1":"0019","c2":"0020","c3":"0021"}
{"c1":"0022","c2":"0023","c3":"0024"}
{"c1":"0025","c2":"0026","c3":"0027"}
{"c1":"0028","c2":"0029","c3":"0030"}