CODEWITHSUNDEEP
shellzip
ggupta
ggupta

Reputation: 717

Remove the space from the beginning of file name inside the zip file, without extracting the zip file

I have n numbers of zip files in a directory. inside these zip files, there is space in the beginning of file name. I just want to remove this space without extracting the zip file.

I tried a shell script, as below.

#!/bin/sh
for zip in *.zip
do
    unzipped=unzip $zip
    trimmed=echo "${unzipped}" | sed -e 's/^[ \t]*//'
    #Want to zip the file here with the same name
done

Need help in this script or if any short method will be most welcome.

Upvotes: 1

Views: 833

Answers (1)

Eduard Itrich
Eduard Itrich

Reputation: 876

You could use the tool zipnote which is part of Info-ZIP's zip package. Based on your code example above, a minimal working example could look like this:

#!/bin/bash

for zip in *.zip
do
    ZIPNOTES=$(zipnote "$zip")
    TRIMMED=$(echo "$ZIPNOTES" | sed -e 's/^@[ \t]\{2,\}\(.*\)/&\n@=\1/')
    echo "$TRIMMED" | zipnote -w "$zip"
done

or as one-liner:

#!/bin/bash
for zip in *.zip; do zipnote "$zip" | sed -e 's/^@[ \t]\{2,\}\(.*\)/&\n@=\1/' | zipnote -w "$zip"; done


Long answer

Let's assume you have a zip archive archive.zip containing the files \ \ foo and bar, the utility zipnote outputs the following lines:

$ zipnote archive.zip
@   foo
@ (comment above this line)
@ bar
@ (comment above this line)
@ (zip file comment below this line)

According to man zipnote:

The names of the files in the zipfile can also be changed in this way. This is done by following lines like "@ name" in the created temporary file (called foo.tmp here) with lines like "@=newname" and then using the -w option as above.

Hence, to rename the file \ \ foo within the zip archive, you have to append the line

@=foo

just beneath the corresponding line

@   foo

and pipe it into zipnote -w archive.zip. The latter is done with a slight modification of your sed command which matches on lines containing an @ symbol followed by two or more whitespaces, grouping the rest of the line and appending the trimmed line beneath.

Upvotes: 3

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