Clever Geek Handbook

Replace directory line ".." using sed

How can I do this in sed?

#input                 #output
file.txt              "nothing" 
dir1/                 ../
dir1/file.txt         ../
dir1/dir2/            ../../
dir1/dir2/file.txt    ../../

Suppose #input is put in $ var1

sed "do something" <<< $var1
echo $var1
+3


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2 answers


You can try this GNU sed



sed "s#dir[0-9]\+/*#\.\./#g; s#file\.txt##g"
+1


source


Does the dir1 / dir2 test run correctly (no forward slash)? How does sed know if dir2 is a file or a directory? Otherwise, you can use:



echo "dir1/dir2/file.txt" | sed s#[^/]*/#../#g | sed 's#[^/]*$##'
0


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