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<!-- Weave of 'Build Scripts' generated by Inweb -->
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< ul class = "crumbs" > < li > < a href = "../index.html" > Home< / a > < / li > < li > < a href = "../compiler.html" > Inbuild Modules< / a > < / li > < li > < a href = "index.html" > supervisor< / a > < / li > < li > < a href = "index.html#3" > Chapter 3: Incremental Builds< / a > < / li > < li > < b > Build Scripts< / b > < / li > < / ul > < / div >
< p class = "purpose" > Scripts are nothing more than lists of build steps.< / p >
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< ul class = "toc" > < li > < a href = "3-bs.html#SP1" > § 1. Build scripts< / a > < / li > < / ul > < hr class = "tocbar" >
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< p class = "commentary firstcommentary" > < a id = "SP1" class = "paragraph-anchor" > < / a > < b > § 1. Build scripts. < / b > Suppose the incremental build algorithm has decided it wants to build node
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< span class = "extract" > < span class = "extract-syntax" > V< / span > < / span > in the graph: it does so by calling < span class = "extract" > < span class = "extract-syntax" > BuildScripts::execute< / span > < / span > on the script
attached to < span class = "extract" > < span class = "extract-syntax" > V< / span > < / span > . This is only a list of steps:
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< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
< span class = "reserved-syntax" > typedef< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > struct< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > build_script< / span > < span class = "plain-syntax" > {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > struct< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > linked_list< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > steps< / span > < span class = "plain-syntax" > ; < / span > < span class = "comment-syntax" > of < / span > < span class = "extract" > < span class = "extract-syntax" > build_step< / span > < / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > CLASS_DEFINITION< / span >
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< span class = "plain-syntax" > } < / span > < span class = "reserved-syntax" > build_script< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "reserved-syntax" > build_script< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > BuildScripts::new< / span > < button class = "popup" onclick = "togglePopup('usagePopup1')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup1" > Usage of < span class = "code-font" > < span class = "function-syntax" > BuildScripts::new< / span > < / span > :< br / > Build Graphs - < a href = "3-bg.html#SP2" > § 2< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > build_script< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > BS< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > CREATE< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > build_script< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > BS< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > steps< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > NEW_LINKED_LIST< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > build_step< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > BS< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > BuildScripts::add_step< / span > < button class = "popup" onclick = "togglePopup('usagePopup2')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup2" > Usage of < span class = "code-font" > < span class = "function-syntax" > BuildScripts::add_step< / span > < / span > :< br / > Build Steps - < a href = "3-bs2.html#SP4" > § 4< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > build_script< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > BS< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > build_step< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > S< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ADD_TO_LINKED_LIST< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > S< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > build_step< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > BS< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > steps< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > }< / span >
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< span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > BuildScripts::script_length< / span > < button class = "popup" onclick = "togglePopup('usagePopup3')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup3" > Usage of < span class = "code-font" > < span class = "function-syntax" > BuildScripts::script_length< / span > < / span > :< br / > Build Graphs - < a href = "3-bg.html#SP5" > § 5< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > build_script< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > BS< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > BS< / span > < span class = "plain-syntax" > == < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ) < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > LinkedLists::len< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > BS< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > steps< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > }< / span >
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< / pre >
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< ul class = "endnotetexts" > < li > The structure build_script is private to this section.< / li > < / ul >
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< p class = "commentary firstcommentary" > < a id = "SP2" class = "paragraph-anchor" > < / a > < b > § 2. < / b > We execute the steps in sequence, of course. As soon as any step fails,
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returning < span class = "extract" > < span class = "extract-syntax" > FALSE< / span > < / span > , the script halts and returns < span class = "extract" > < span class = "extract-syntax" > FALSE< / span > < / span > . An empty script
always succeeds and returns < span class = "extract" > < span class = "extract-syntax" > TRUE< / span > < / span > .
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< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > BuildScripts::execute< / span > < button class = "popup" onclick = "togglePopup('usagePopup4')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup4" > Usage of < span class = "code-font" > < span class = "function-syntax" > BuildScripts::execute< / span > < / span > :< br / > Incremental Building - < a href = "3-ib.html#SP7_1_3" > § 7.1.3< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > build_vertex< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > V< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > build_script< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > BS< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > build_methodology< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > BM< / span > < span class = "plain-syntax" > ,< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > linked_list< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > search_list< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > rv< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > TRUE< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > build_step< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > S< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > LOOP_OVER_LINKED_LIST< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > S< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > build_step< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > BS< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > steps< / span > < span class = "plain-syntax" > )< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > rv< / span > < span class = "plain-syntax" > )< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > rv< / span > < span class = "plain-syntax" > = < / span > < a href = "3-bs2.html#SP5" class = "function-link" > < span class = "function-syntax" > BuildSteps::execute< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > V< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > S< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > BM< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > search_list< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > rv< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< / pre >
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