bashchangelog

bash get first word last line

I got a bash script and I started to write a changelog to keep track of changes.

I added in the script a function that echoes "Script version --> " But I have to manually edit it.

So I would need a function to get the first word until space of the last line and store it as $CURRENTVERSION

Changelog syntax is: 

v-0.3.2 Added x, y.

v-0.3.2.1 Fixed y.

v-0.4 Added z.

Briefly I would need to store v-0.4 as $CURRENTVERSION

Solution

  • Using awk:

    awk '{w=$1} END{print w}' file

    OR using sed:

    sed -n '$s/^\([^ ]*\).*$/\1/p' file