regex on variable in bash script [duplicate]

Question

I am trying to cut out the prefix from a variable that represents path.

Currently this is my code:

for f in /Users/username/Documents/Dev/beneficiary-service/src/main/helm/*
do
  echo $f
  if [[ $f == 'values'* ]]
  then
      yq d -i $f 'resources.'
  fi
done

I printed $f to see its output. I expected it to be ONLY the filename, without the path (values-stg.yaml). However, this is the output:

+ echo /Users/username/Documents/Dev/beneficiary-service/src/main/helm/values-stg.yaml
/Users/username/Documents/Dev/beneficiary-service/src/main/helm/values-stg.yaml
+ [[ /Users/username/Documents/Dev/beneficiary-service/src/main/helm/values-stg.yaml == \v\a\l\u\e\s* ]]

And also, the "if" statement will never be true, because it considers values* literally as is and not as "anything that starts with values"

Remove the path using parameter expansion: [[ ${f##*/} == values* ]]. — choroba
– choroba, Commented Apr 13, 2021 at 9:10
@Dominique Please take a look on my new thread: stackoverflow.com/questions/67089998/… — jrz
– jrz, Commented Apr 14, 2021 at 10:34

choroba · Accepted Answer · 2021-04-13 09:19:11Z

1

Path expansion includes the whole path specified. You can remove it using parameter expansion

[[ ${f##*/} == values* ]]

the "if" statement will never be true

That's not true. Quoting values is not needed, though, as none of the characters is special.

answered Apr 13, 2021 at 9:19

choroba

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1 Comment

jrz Over a year ago

I took this into docker and got some changes, please take a look on my new thread: stackoverflow.com/questions/67089998/…

irnerd · Accepted Answer · 2021-04-13 09:21:40Z

0

Use Basename - demonstration below - assigned output of basename "${f}" (in case of white space in file names)

for f in /Users/username/Documents/Dev/beneficiary-service/src/main/helm/*
do
  echo $f
  bf=$(basename "${f}") ; echo ${bf}
  if [[ ${bf} == 'values'* ]]
  then
      echo yq d -i ${bf} 'resources.'
  fi
done

answered Apr 13, 2021 at 9:21

irnerd

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1 Comment

jrz Over a year ago

Please take a look in my new thread: stackoverflow.com/questions/67089998/…

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