Makefile: Difference between revisions
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==Links== | ==Links== | ||
[https://www.gnu.org/software/make/ GNU Make] | [https://www.gnu.org/software/make/ GNU Make] | ||
==Example makefile== | |||
<pre> | |||
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 $(listtxt) > src/list.txt | |||
tesseract src/list.txt src/plain | |||
myscript: tesseract | |||
cat src/plain.txt | python3 src/myscript.py > output/a-new-file.txt | |||
</pre> | |||
Revision as of 17:33, 22 February 2018
Makefiles are used in compiling processes.
makefiles have a version check system built in For example, if you use a makefile to process a set of jpg's, it takes them all. If you run the makefile again, it only processes the files that where changed.
Links
Example makefile
images=$(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