CODEWITHSUNDEEP
stringbashawktokenize
Eric B.
Eric B.

Reputation: 24441

How to split the string into variables/parameters to pass to another script?

I've got a list of files (with full paths) that I need to split into tokens to be able to pass to another script/command. Looking at the style of the strings, I figure awk is the right tool to use, but I just can't seem to figure out how to do this given that the number of tokens vary by line.

Given a filename ./some/path/to/artifact_name/v1.2.3/filename.jar, I need to be able to extract the following:

For example, given: 

./com/eric/ics/BillP/3.5.11/BillP-3.5.11.jar
- filename: BillP-3.5.11.jar
-version: 3.5.11
-artifact: BillP
-group: com.eric.ics

My biggest complication becomes that the number of folders representing the group can change. For ex: ./com/eric/some/other/pkg/BillP/3.5.11/BillP-3.5.11.jar would be just as valid, except that the group would then be com.eric.some.other.pkg.

My goal is to pass these 4 params to a separate script once I've managed to extract them, but I cannot seem to figure out the easiest way to do this. Is awk the right tool for this? Is there something better/easier to use?

Upvotes: 3

Views: 124

Answers (3)

Gilles Quénot
Gilles Quénot

Reputation: 185530

Using :

#!/usr/bin/env perl    
use strict; use warnings;

while (<DATA>) {
    chomp;
    my @list = split /\//;
    print map { $_ . "\t" . pop(@list) . "\n" }
        qw/-filename: -version: -artifact:/;
    print "-group:\t\t", join(".", @list[1..$#list]), "\n\n";
}

__DATA__
./com/eric/ics/ccc/BillP/3.5.11/BillP-3.5.11.jar
./com/eric/ics/BillP/3.5.11/BillP-3.5.11.jar
./com/eric/ics/xxx/yyy/BillP/3.5.11/BillP-3.5.11.jar

OUTPUT:

-filename:      BillP-3.5.11.jar
-version:       3.5.11
-artifact:      BillP
-group:         com.eric.ics.ccc

-filename:      BillP-3.5.11.jar
-version:       3.5.11
-artifact:      BillP
-group:         com.eric.ics

-filename:      BillP-3.5.11.jar
-version:       3.5.11
-artifact:      BillP
-group:         com.eric.ics.xxx.yyy

Upvotes: 0

anubhava
anubhava

Reputation: 785481

Using gnu-awk:

awk -F/ -v OFS=. '{f=$NF;v=$(NF-1);a=$(NF-2); NF-=3; sub(/^[^[:alnum:]]+/, ""); 
  printf "-filename: %s\n-version: %s\n-artifact: %s\n-group: %s\n\n", f, v, a, $0 }' file
-filename: BillP-3.5.11.jar
-version: 3.5.11
-artifact: BillP
-group: com.eric.ics

-filename: BillP-3.5.11.jar
-version: 3.5.11
-artifact: BillP
-group: com.eric.some.other.pkg

cat file
./com/eric/ics/BillP/3.5.11/BillP-3.5.11.jar
./com/eric/some/other/pkg/BillP/3.5.11/BillP-3.5.11.jar

EDIT: To call a secondary script using these params:

awk -F/ -v OFS=. '{f=$NF;v=$(NF-1);a=$(NF-2); NF-=3; sub(/^[^[:alnum:]]+/, ""); 
  system("./script.sh " f " " v " " a " " $0) }' file

Upvotes: 1

Hans Kl&#252;nder
Hans Kl&#252;nder

Reputation: 2292

You can use awk or perl to print all the components and pipe that into read to assign them to different variable names, or use the less elegant commands dirname and basename several times to get the components one by one, storing them immediately into variables that you can use as parameters to call other scripts. Depends on what your like.

#!/bin/bash

p="$1"
file="$(basename "$p")"
p="$(dirname "$p")"
version="$(basename "$p")"
p="$(dirname "$p")"
artifact="$(basename "$p")"
group="$(dirname "$p" | tr / . | sed 's+\.*++')"

echo file=$file version=$version artifact=$artifact group=$group

Now you have these 4 parameters in 4 variables which you can pass to whatever you like.

Upvotes: 1

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