Question

How do I list newest directory and add as variable to bash script to process files recursively

ls -t1 | head -n1

Works perfectly to list the latest directory, but I want to add that directory name to my script so I can process the files within using the following script:

#!/bin/bash
ls | while read -r FILE
do
    mv -v "$FILE" `echo $FILE | tr ' ' '_' `
done
ls | while read -r FILE
do
    mv -v "$FILE" `echo $FILE | tr '\*.JPEG' '\*.jpg' `
done
    mogrify -resize 750 *.jpg
wait 
    jpegoptim *.jpg –max=70 --strip-all
exit

I also want to process the files recursively, there might be at most one level of sub directories.

Basically keep the bash script at the root of the directory and process all latest directories and sub directories files.

OK I modified the script to this:

#!/bin/bash
DIR=ls -t1 | head -n1
ls $DIR | while read -r FILE
do
    mv -v "$FILE" `echo $FILE | tr ' ' '_' `
done
ls $DIR | while read -r FILE
do
    mv -v "$FILE" `echo $FILE | tr '\*.JPEG' '\*.jpg' `
done
    mogrify -resize 750 $DIR/*.jpg
wait 
    jpegoptim $DIR/*.jpg –max=70 --strip-all
exit

But it does not seem to recognise the $DIR variable.

Answer 1

This bash script will rename and convert the jpg files in the newest directory in the current directory and the files in the first level of directories under that directory.

#!/bin/bash

FIRST_DIR=`ls -t1F | grep / | head -n1`
DIR="./${FIRST_DIR}"
ls -t1F $DIR | while read -r FILE
do
    if [ "$FILE" ]
    then
        if [[ $FILE = */ ]]
        then
            echo "here ${DIR}${FILE}."
            DEEP_DIR="${DIR}${FILE}"
            ls -t1 $DEEP_DIR | while read -r FILE2
            do
                if [ "$FILE2" ]
                then
                    if [[ $FILE2 != */ ]]
                    then
                        RENAME=`echo ${FILE2//\*/} | tr ' ' '_' `
                        mv -v "${DEEP_DIR}${FILE2//\*/}" "${DEEP_DIR}${RENAME}"
                        FILE2=$RENAME

                        RENAME2=`echo ${FILE2//\*/} | tr '\*.JPEG' '\*.jpg' `
                        mv -v "${DEEP_DIR}${FILE2//\*/}" "${DEEP_DIR}${RENAME2}"
                        FILE2=$RENAME2
                    fi
                fi
            done

            mogrify -resize 750 "$DEEP_DIR*.jpg"
            wait 
            jpegoptim "$DEEP_DIR*.jpg" –max=70 --strip-all
        fi
        if [[ $FILE != */ ]]
        then
            RENAME=`echo ${FILE//\*/} | tr ' ' '_' `
            mv -v "${DIR}${FILE//\*/}" "${DIR}${RENAME}"
            FILE=$RENAME

            RENAME2=`echo ${FILE//\*/} | tr '\*.JPEG' '\*.jpg' `
            mv -v "${DIR}${FILE//\*/}" "${DIR}${RENAME2}"
            FILE=$RENAME2   
        fi
    fi
done
if [ "$FIRST_DIR" ]
then
    mogrify -resize 750 "$DIR*.jpg"
    wait 
    jpegoptim "$DIR*.jpg" –max=70 --strip-all
fi

Here are a couple of good links about bash programming:

http://tldp.org/LDP/abs/html/comparison-ops.html

http://tldp.org/LDP/abs/html/string-manipulation.html