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Highlight differences between lines

0

I have a file with near-identical lines which have some slight differences, and I want to have a highlight of the differences between each line.

Example:

• The quick brown fox jumps over the lazy dog.


• The quack brown fox leaps over the lazy dog.


• The quack fox leaps over the very lazy dog.


• The quack fox leaps oer the really very lazy dog.

(here bold text marks characters that have been inserted and changed compared to the previous line, and italics marks characters that are removed in the next line).

The highlighting doesn't need to look exactly like in the example, but it should indicate which characters have been added, changed or removed. And it should indicate this solely with highlighting (ie. no printing of old and new characters in one line), so that the actual text on each line is still identical to the original text.

I have tried to build something with dwdiff (iterating over the lines and then comparing consecutive lines), but haven't found a way to highlight deleted characters:

infile=$1
line1=
line2=
lineNo=0
while IFS="" read -r nextLine || [ -n "$nextLine" ]; do
 line1=$line2
 line2=$nextLine

 if [[ "$lineNo" -gt 0 ]]; then
 dwdiff -1 -c <(printf '%sn' "$line1") <(printf '%sn' "$line2")
 else
 printf '%sn' "$line2"
 fi

 lineNo=$((lineNo+1))
done

Ideally the diff would actually work on characters, but word-level differences would be OK as well.

Is there a way to get this result with dwdiff? Or is there an existing tool which does this?

diff

share|improve this question

asked 2 days ago

oliveroliver

28614

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Did you miss highlighting oer in the last line?
  
  – Inian
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Inian: I have only highlighted the deleted "v" character in the line above. Not really easy to see; with colored highlighting this might be more usable. And yes, with word-level differences the entire "oer" would have to be highlighted.
  
  – oliver
  2 days ago
  

  
  
  
  

add a comment | 

0

I have a file with near-identical lines which have some slight differences, and I want to have a highlight of the differences between each line.

Example:

• The quick brown fox jumps over the lazy dog.


• The quack brown fox leaps over the lazy dog.


• The quack fox leaps over the very lazy dog.


• The quack fox leaps oer the really very lazy dog.

(here bold text marks characters that have been inserted and changed compared to the previous line, and italics marks characters that are removed in the next line).

The highlighting doesn't need to look exactly like in the example, but it should indicate which characters have been added, changed or removed. And it should indicate this solely with highlighting (ie. no printing of old and new characters in one line), so that the actual text on each line is still identical to the original text.

I have tried to build something with dwdiff (iterating over the lines and then comparing consecutive lines), but haven't found a way to highlight deleted characters:

infile=$1
line1=
line2=
lineNo=0
while IFS="" read -r nextLine || [ -n "$nextLine" ]; do
 line1=$line2
 line2=$nextLine

 if [[ "$lineNo" -gt 0 ]]; then
 dwdiff -1 -c <(printf '%sn' "$line1") <(printf '%sn' "$line2")
 else
 printf '%sn' "$line2"
 fi

 lineNo=$((lineNo+1))
done

Ideally the diff would actually work on characters, but word-level differences would be OK as well.

Is there a way to get this result with dwdiff? Or is there an existing tool which does this?

diff

share|improve this question

asked 2 days ago

oliveroliver

28614

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Did you miss highlighting oer in the last line?
  
  – Inian
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Inian: I have only highlighted the deleted "v" character in the line above. Not really easy to see; with colored highlighting this might be more usable. And yes, with word-level differences the entire "oer" would have to be highlighted.
  
  – oliver
  2 days ago
  

  
  
  
  

add a comment | 

I have a file with near-identical lines which have some slight differences, and I want to have a highlight of the differences between each line.

Example:

• The quick brown fox jumps over the lazy dog.


• The quack brown fox leaps over the lazy dog.


• The quack fox leaps over the very lazy dog.


• The quack fox leaps oer the really very lazy dog.

(here bold text marks characters that have been inserted and changed compared to the previous line, and italics marks characters that are removed in the next line).

The highlighting doesn't need to look exactly like in the example, but it should indicate which characters have been added, changed or removed. And it should indicate this solely with highlighting (ie. no printing of old and new characters in one line), so that the actual text on each line is still identical to the original text.

I have tried to build something with dwdiff (iterating over the lines and then comparing consecutive lines), but haven't found a way to highlight deleted characters:

infile=$1
line1=
line2=
lineNo=0
while IFS="" read -r nextLine || [ -n "$nextLine" ]; do
 line1=$line2
 line2=$nextLine

 if [[ "$lineNo" -gt 0 ]]; then
 dwdiff -1 -c <(printf '%sn' "$line1") <(printf '%sn' "$line2")
 else
 printf '%sn' "$line2"
 fi

 lineNo=$((lineNo+1))
done

Ideally the diff would actually work on characters, but word-level differences would be OK as well.

Is there a way to get this result with dwdiff? Or is there an existing tool which does this?

diff

share|improve this question

asked 2 days ago

oliveroliver

28614

infile=$1
line1=
line2=
lineNo=0
while IFS="" read -r nextLine || [ -n "$nextLine" ]; do
 line1=$line2
 line2=$nextLine

 if [[ "$lineNo" -gt 0 ]]; then
 dwdiff -1 -c <(printf '%sn' "$line1") <(printf '%sn' "$line2")
 else
 printf '%sn' "$line2"
 fi

 lineNo=$((lineNo+1))
done

share|improve this question

asked 2 days ago

oliveroliver

28614

share|improve this question

asked 2 days ago

oliveroliver

28614

asked 2 days ago

oliveroliver

28614

asked 2 days ago

oliveroliver

28614