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# if the `--umbrella-spec` option is set, then these two rules will use it as their umbrella specs;
# otherwise, they will run as it is without being wrapped by the umbrella wrapper.
capitol.montage.gif: capitol.jpg capitol.90.jpg capitol.180.jpg capitol.270.jpg capitol.360.jpg
convert -delay 10 -loop 0 capitol.jpg capitol.90.jpg capitol.180.jpg capitol.270.jpg capitol.360.jpg capitol.270.jpg capitol.180.jpg capitol.90.jpg capitol.montage.gif
capitol.90.jpg: capitol.jpg
convert -swirl 90 capitol.jpg capitol.90.jpg
# the following three rules will use umbrella_specs/convert_S_category1.umbrella as their umbrella specs
.MAKEFLOW CATEGORY 1
.UMBRELLA SPEC umbrella_specs/convert_S_category1.umbrella
capitol.180.jpg: capitol.jpg
convert -swirl 180 capitol.jpg capitol.180.jpg
capitol.270.jpg: capitol.jpg
convert -swirl 270 capitol.jpg capitol.270.jpg
capitol.360.jpg: capitol.jpg
convert -swirl 360 capitol.jpg capitol.360.jpg
# the following rule will use umbrella_specs/convert_S_category2.umbrella as its umbrella spec
.MAKEFLOW CATEGORY 2
.UMBRELLA SPEC umbrella_specs/convert_S_category2.umbrella
capitol.jpg:
curl -o capitol.jpg https://ccl.cse.nd.edu/images/capitol.jpg
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