CODEWITHSUNDEEP
linuxawk
user5405648
user5405648

Reputation:

Append multiple directories contents to one file with AWK?

I've got a shell script which merges all my migration and seeder files to two bigger files, but I want to merge migrate.sql and seed.sql into just one big file called deploy.sql.

Is there a way with AWK to accept multiple directories into one final file?

Example:

#!/bin/bash
mkdir -p output
awk '{print}' ./migrations/*.sql > "output/migrate.sql"
awk '{print}' ./seeders/*.sql > "output/seed.sql"

Upvotes: 0

Views: 13

Answers (1)

Daweo
Daweo

Reputation: 36755

Is there a way with AWK to accept multiple directories into one final file?

GNU AWK does not accept directories, but rather files, in your case

awk '{print}' ./migrations/*.sql > "output/migrate.sql"
awk '{print}' ./seeders/*.sql > "output/seed.sql"

argument with * is replaced by all files compliant with descripition before being rammed into awk, consider following example, say you have only following files in current dir

file1.txt
file2.txt
file3.txt

which are empty then

awk 'BEGIN{print ARGV[1],ARGV[2],ARGV[3]}' file*.txt

does output

file1.txt file2.txt file3.txt

Observe that even in BEGIN, ARGV has entry for each file, rather than single entry with file*.txt.

You might use more than 1 argument with * when using GNU AWK that is you might do

awk '{print}' ./migrations/*.sql ./seeders/*.sql > "output/deploy.sql"

(tested in gawk 4.2.1)

Upvotes: 1

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