Makefile: Difference between revisions
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myscript: tesseract | myscript: tesseract | ||
cat src/plain.txt | python3 src/myscript.py > output/a-new-file.txt | cat src/plain.txt | python3 src/myscript.py > output/a-new-file.txt | ||
</pre> | |||
===myscript.py=== | |||
<pre> | |||
from sys import stdin, stdout | |||
txt = stdin.read() | |||
output = txt.replace(' the ', ' ******a***** ') | |||
stdout.write(output) | |||
</pre> | </pre> | ||
Revision as of 17:40, 22 February 2018
Makefiles are used in compiling processes.
makefiles have a version check system built in For example, if you use a makefile to process a set of jpg's, it takes them all. If you run the makefile again, it only processes the files that where changed.
Links
Example makefile
images=$(wildcard images/*.jpg) # creates: images/001.jpg images/002.jpg images/000.jpg space:= $(empty) $(empty) newline:= '\n' listtxt:= $(subst $(space),$(newline),$(images)) # subst is a way to do string replacements, it works like this: $(subst $(delimitator),$(replacement),$(list)) # it's used here to make a list of the images, with one filename on each line tesseract: echo $(listtxt) > src/list.txt tesseract src/list.txt src/plain myscript: tesseract cat src/plain.txt | python3 src/myscript.py > output/a-new-file.txt
myscript.py
from sys import stdin, stdout
txt = stdin.read()
output = txt.replace(' the ', ' ******a***** ')
stdout.write(output)