Question

I have a file called Strings.h, that I use to localize an app I have. I want to search through all of my class files, and find out if and where I am using each string, and output the classes and line numbers for each string.

My thought is to use Python, but maybe that’s the wrong tool for the job. Also, I have a basic algorithm, but I worry it will take too long to run. Can you write this script to do what I want, or even just suggest a better algorithm?

Strings.h looks like this:

#import "NonLocalizedStrings.h"

#pragma mark Coordinate Behavior Strings
#define LATITUDE_WORD NSLocalizedString(@"Latitude", @"used in coordinate behaviors")
#define LONGITUDE_WORD NSLocalizedString(@"Longitude", @"used in coordinate behaviors")
#define DEGREES_WORD NSLocalizedString(@"Degrees", @"used in coordinate behaviors")
#define MINUTES_WORD NSLocalizedString(@"Minutes", @"Used in coordiante behaviors")
#define SECONDS_WORD NSLocalizedString(@"Seconds", @"Used in DMSBehavior.m")

...

The script should take each line that starts with #define, and then make a list of the word that appears after #define (e.g.) LATITUDE_WORD

The pseudocode might be:

file = strings.h
for line in file:
  extract word after #define
  search_words.push(word) 

print search_words
[LATITUDE_WORD, LONGITUDE_WORD, DEGREES_WORD, MINUTES_WORD, SECONDS WORD]

After I have the list of words, my pseudocode is something like:

found_words = {}
for word in words:
   found_words[word] = []

for file in files:
  for line in file:
    for word in search_words:
      if line contains word:
        found_words[word].push((filename, linenumber))   

print found_words

So, found words would look something like:

 {
   LATITUDE_WORD: [
                    (foo.m, 42),
                    (bar.m, 132) 
                  ],
   LONGITUDE_WORD: [
                    (baz.m, 22),
                    (bim.m, 112) 
                  ],

 }

Answer 1

How about this [in bash] ?

$ pattern="\\<($(grep '^#define ' Strings.h | cut -d' ' -f2 | tr '\n' '|' | sed 's/|$//'))\\>"
$ find project_dir -iname '*.m' -exec egrep -Hno "${pattern}" {} + > matches

Output:

project_dir/bar.m:132:LATITUDE_WORD
project_dir/baz.m:22:LONGITUDE_WORD
project_dir/bim.m:112:LONGITUDE_WORD
project_dir/foo.m:42:LATITUDE_WORD

EDIT: I’ve altered the code above to redirect it’s output to a file matches, so we can use that to show words that are never found:

for word in $(grep '^#define ' Strings.h | cut -d' ' -f2)
do
    if ! cut -d':' -f3 matches | grep -q "${word}"
    then
        echo "${word}"
    fi
done