build.ninja

#
# Variables
#
exefile = lissajous
srcfile = $exefile.go


#
# Rules
#
rule mod_init_r
    command = go mod init $exefile

rule tidy_r
    command = go mod tidy

rule build_r
    command = go build $out

rule exe_r
    command = ./$in

#rule test2_r
#    command = echo "this\nthis\nthat\n" | ./$exefile
#    description = "tests with standard input"


# NOTE: this might need an entry for implicit = out.gif
# however it chokes on implicit = line
#
# The way its working now, test3 and out.gif are both outputs
# of the build rule.  However, test3 is an implicit output.
# An implicit output does not show up in the list of outputs
# passed to rule and referred to as $out.
rule test3_r
    command = ./$in > $out; open $out
#    command = ./$in > out.gif; open out.gif
#    command = ./$in > $out1; open $out1
#    command = ./$exefile > out.gif
#    command = "./$exefile > out.gif; open out.gif"
    description = "tests by making gif and then display"
#    implicit = out.gif


#
# build targets
#



# go.mod
build $
go.mod $
: mod_init_r 

# tidy
build $
nothing $
: tidy_r $srcfile $
| go.mod


# build stanza notes
#build $                      # signifies a build stanza
#$exefile $                   # list of outputs 
#: build_r $srcfile           # : denotes a rule and list of inputs
#| go.mod                     # | denotes a list of dependencies


#build $                      # signifies a build stanza
#$exefile $                   # list of outputs 
#: build_r $srcfile $         # : denotes a rule and list of inputs
#| go.mod                     # | denotes a list of dependencies




# $exefile
build $
$exefile $
: build_r $srcfile $
| go.mod                     



# test 1
build $
test1 $
: exe_r $exefile

# test 2
# $ ninja test2
#build $
#test2 $
#: test2_r $exefile

# test 3
# This shows that out.gif is an implicit output generated
# by running the build but it did not work
build $
out.gif $
| test3 $
: test3_r $exefile


# by default only this target is made
#default $exefile
default test3