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

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