Remove forward-slash using sed

Question

I have a text file that contains following

https://git.centos.org/git/rpms/abc.git
https://git.centos.org/git/rpms/abc.git/
https://git.centos.org/git/rpms/abc

When I run the following command,

reponame=$(echo $url | awk -F/ '{print $NF}' | sed -e 's/.git\/$//' | sed -e 's/.git//')
echo $reponame

I am supposed to get

abc

It fails for the lines ending in .git/ but it works for the other 2 cases.

Answer 1

You have to remove the trailing slash before you print the last field with awk. Otherwise the last field will be empty.

Use

echo "$url" | sed -e 's#/$##' -e 's/\.git$//' | awk -F / '{print $NF}'

or even

echo "$url" | sed -e 's#/$##' -e 's/\.git$//' -e 's#^.*/##'

Tips:

• You can give several sed commands to one invocation of sed so it is sometimes not necessary to pipe from sed to sed. Either sed -e 'cmd1' -e 'cmd2' ... or sed 'cmd1;cmd2;...' will work.
• You can use a different delimiter for the s command of sed so you do not have to escape slashes in the pattern (I used # as a delimiter).

Answer 2

Assuming all your lines in a file either have .git extension

ALSO SOLUTION IS GIVEN WITHOUT SED

SHW@SHW:/tmp/abc # cat a
https://git.centos.org/git/rpms/abc.git
https://git.centos.org/git/rpms/abc.git/
https://git.centos.org/git/rpms/abc
SHW@SHW:/tmp/abc # cat a | while read line; do basename $line .git; done
abc
abc
abc

Answer 3

I think the problem is the field separator of the awkcommand. Change the order, first the sed commands, than the awkcommand:

reponame=$(echo $url |  sed -e 's/.git\/$//' | sed -e 's/.git//' | awk -F/ '{print $NF}')
echo $reponame

Answer 4

$ sed -E -e '\%(\.git|/)$%d' -e 's%.*/%%' file
abc

The sed script above first removes all lines from the input that ends with either / or the string .git. It then strips off everything from the remaining lines up to and including the last /.

Since the text we are dealing with contains /, we're using % as an alternative delimiter in the sed expressions.

If you want to extract abc from each line in the file:

$ sed -E -e 's%\.git/?$%%g' -e 's%.*/%%' file
abc
abc
abc

This first removes the string .git (possibly followed by a /) from the end of each line of input before applying the same substitution as in the first sed command.