C
CrazedNerd
Guest
So using the concepts that @JasKinasis mentioned mentioned in my other thread here (readarray and array loops), i've been using them on scripts that compare and display lines in separated documents and put them in a different format than the commands "comm" and "diff". I've successfully done this for showing two documents side by side, or showing lines alone that are different through "sort"...but it would be better if i could show sorted lines paired with the line number as they stand in the original document. In other words, it wouldn't be helpful to show a user the line number for different lines as they stand in a sorted document, because they're in a different order than what they need to be in code or in an original document. I've been experimenting with a script for this, but so far i just have this, which either prints different lines when the files are sorted or compares what the different lines if the documents are side by side like i mentioned before:
Code:
#!/bin/bash
#easier to read format for showing differences between files
#tells user how to use script
SCRIPT=$0
if [ $# -lt 2 ]; then
echo "This script needs two files as arguments: ${SCRIPT##*/} file file2"
exit 1
fi
if ! [ -f $1 ] || ! [ -f $2 ]; then
echo "File or files do not exist."
exit 2
fi
sed 's/^[ \t]*//g' $1 > temp-diff
sed 's/^[ \t]*//g' $2 > temp-diff2
#assigns lines to arrays
#readarray -t DIFF < $1
#readarray -t DIFF2 < $2
readarray -t DIFF < temp-diff
readarray -t DIFF2 < temp-diff2
#prompts user for viewing unique lines or a side-by-side comparison
echo "Would you like to sort the results? With sorting, you see unique lines"
read -p "In the document instead of a side-by-side comparison (y/n) " answer
until [[ $answer = [yYnN] ]]; do
read -p "Incorrect answer, type y or n and press enter. To quit, enter q: " answer
if [[ $answer = [Qq] ]]; then
exit 0
fi
done
#chooses sort
if [[ $answer = [Yy] ]]; then
echo -e "\nThese lines are unique to $1:\n"
diff --new-line-format="" --unchanged-line-format="" <(sort $1) <(sort $2) | sed '/^$/d;s/^[ \t]*//g' | uniq
echo -e "\nThese lines are unique to $2:\n"
diff --new-line-format="" --unchanged-line-format="" <(sort $2) <(sort $1) | sed '/^$/d;s/^[ \t]*//g' | uniq
fi
#chooses comparison
if [[ $answer = [Nn] ]]; then
echo -e "\nDifferent lines in $1:\n"
count=${#DIFF[@]} #sets limit for looping
#loops non-matching lines in an array plus their line number from first file
for (( j=0; j<count; j++ )); do
line_numb=$((j + 1))
if [ "${DIFF[j]}" != "${DIFF2[j]}" ] && [ -n "${DIFF[j]}" ]; then
echo "${DIFF[j]} (Line $line_numb)"
fi
done
fi
if [[ $answer = [Nn] ]]; then
echo -e "\nDifferent lines in $2:\n"
count2=${#DIFF2[@]}
#loops non-matching lines in an array from their line number from second file
for (( j=0; j<count2; j++ )); do
line_numb=$((j + 1))
if [ "${DIFF[j]}" != "${DIFF2[j]}" ] && [ -n "${DIFF2[j]}" ]; then
echo "${DIFF2[j]} (Line $line_numb)"
fi
done
fi
rm temp-diff temp-diff2
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