I am currently helping a friend reorganise several hundred images on a database driven website. I have generated a list of the new, reorganised image paths offline and would like to replace each matching image reference in the sql export of the database with the new paths.
EDIT: Here is an example of what I am trying to achieve
The new_paths_list.txt is a file that I generated using a batch script after I had organised all of the existing images into folders. Prior to this all of the images were in just a few folders. A sample of this generated list might be:
image/data/product_photos/telephones/snom/snom_xyz.jpg
image/data/product_photos/telephones/gigaset/giga_xyz.jpg
A sample of my_exported_db.sql (the database exported from the website) might be:
...
,(110,32,'data/phones/snom_xyz.jpg',3),(213,50,'data/telephones/giga_xyz.jpg',0),
...
The result I want is my_exported_db.sql to be:
...
,(110,32,'data/product_photos/telephones/snom/snom_xyz.jpg',3),(213,50,'data/product_photos/telephones/gigaset/giga_xyz.jpg',0),
...
Some pseudo code to illustrate:
1/ Find the first image name in my_exported_db.sql, such as 'snom_xyz.jpg'.
2/ Find the same image name in new_paths_list.txt
3/ If it is present, copy the whole line (the path and filename)
4/ Replace the whole path in in my_exported_db.sql of this image with the copied line
5/ Repeat for all other image names in my_exported_db.sql
A regex expression that appears to match image names is:
([^)''"/])+\.(?:jpg|jpeg|gif|png)
and one to match image names, complete with path (for relative or absolute) is:
\bdata[^)''"\s]+\.(?:jpg|jpeg|gif|png)
I have looked around and have seen that Sed or Awk may be capable of doing this, but some pointers would be greatly appreciated. I understand that this will only work accurately if there are no duplicated filenames.
You can use sed to convert new_paths_list.txt into a set of sed replacement commands:
sed 's|\(.*\(/[^/]*$\)\)|s#data\2#\1#|' new_paths_list.txt > rules.sed
The file rules.sed will look like this:
s#data/snom_xyz.jpg#image/data/product_photos/telephones/snom/snom_xyz.jpg#
s#data/giga_xyz.jpg#image/data/product_photos/telephones/gigaset/giga_xyz.jpg#
Then use sed again to translate my_exported_db.sql:
sed -i -f rules.sed my_exported_db.sql
I think in some shells it's possible to combine these steps and do without rules.sed:
sed 's|\(.*\(/[^/]*$\)\)|s#data\2#\1#|' new_paths_list.txt | sed -i -f - my_exported_db.sql
but I'm not certain about that.
EDIT<:
If the images are in several directories under data/, make this change:
sed "s|image/\(.*\(/[^/]*$\)\)|s#[^']*\2#\1#|" new_paths_list.txt > rules.sed