apply-subs

A command line tool to apply a dictionnary (json) of substitutions to text files.

Installation

The easiest installation method is

$ pip install apply-subs

In order to install apply-sub in isolation, use pipx instead.

Examples

minimal case

$ echo "Lorem ipsum dolor sit amet, consectetur adipiscing elit" > mytext.txt
$ echo '{"Hello": "Lorem ipsum", "goodbye": "adipiscing elit"}' > mysubs.json
$ apply-subs mytext.txt -s mysubs.json

will print the patched content

Hello dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore goodbye.

diff mode

Use diff mode (-d/--diff) to print a diff instead of the end result

--- mytext.txt
+++ mytext.txt (patched)
@@ -1 +1 @@
-Lorem ipsum dolor sit amet, consectetur adipiscing elit
+Hello dolor sit amet, consectetur goodbye

Use -cp/--cdiff/--colored-diff for a colored output (when supported).

inplace substitutions

-i/--inplace

$ apply-subs --inplace mytext.txt -s mysubs.json

is equivalent to

$ apply-subs mytext.txt -s mysubs.json > mytext.txt

target several files in one go

The target positional argument can consist of a single file (as illustrated above), or many. This is useful for instance if you need to apply a set of subtitutions to all files in a project whose name match a regexp.

$ git ls-files | egrep "(.md|.py)$" | xargs apply-subs -s subsubs.json -i