Replacing a text file with a directory name using sed command

Question

I have the directories structure as below:

Folder1/ |____file.txt Folder2/ |____file.txt Folder3/ |____file.txt : Foldern/ |____file.txt 

Each .txt file in the directories has a word that I want to replace with the directory name.

file.txt:

"name": "Engineering", 

I am looking to replace the word Engineering with the directory name, e.g. for Folder1:

"name": "Folder1" 

My intial attempt is as below:

for f in Folder*; do (cd $f; echo $f; sed -i -e "s/Engineering/Folder*/" file.txt); done 

However, the sed command doesn't seem to see Folder* as Folder numbers.

Answer 1

There's no need to cd into the directory. You can loop over the file paths and extract the folder name:

for file in Folder*/file.txt; do sed -i -e "s/Engineering/${file%%/*}/" "$file" done 

The parameter expansion ${file%%/*} removes the longest suffix /* and leaves the folder name.