<div dir="ltr"><div>wow that's about the most complicated way to share your dependencies I've seen so far..</div><div><br></div><div>I see an arc from aOld\b.out.tmp -> aOld\b.out which goes around PreProcess.py (same for aNew\b.out.tmp).</div><div>How does b.out "use" the .tmp file directly?</div><div>Or is that a mistake/error in your representation?</div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Sat, Mar 29, 2025 at 1:02 PM Keith Prussing <<a href="mailto:kprussing74@gmail.com">kprussing74@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto">I’ll throw in that the ToolsForFools (link below) helped me understand Builders in the context of Second. <div><br></div><div><div dir="ltr">Keith Prussing</div><div dir="ltr"><br></div><div dir="ltr"><div style="display:block"><div style="display:inline-block" role="link"><a style="border-radius:10px;font-family:-apple-system,Helvetica,Arial,sans-serif;display:block;width:300px;overflow:hidden;text-decoration:none" rel="nofollow" href="https://github.com/SCons/scons/wiki/ToolsForFools" dir="ltr" role="button" width="300" target="_blank"><table style="table-layout:fixed;border-collapse:collapse;width:300px;background-color:rgb(69,37,34);font-family:-apple-system,Helvetica,Arial,sans-serif" cellpadding="0" cellspacing="0" border="0" width="300"><tbody><tr><td align="center"><img style="width: 300px; height: 99px;" width="300" height="99" alt="60082f80-4d90-11ea-8bc5-15d065acb8d1.png" src="cid:ii_195eda91cb9e806cc561"></td></tr><tr><td><table bgcolor="#452522" cellpadding="0" cellspacing="0" width="300" style="table-layout:fixed;font-family:-apple-system,Helvetica,Arial,sans-serif;background-color:rgb(69,37,34)"><tbody><tr><td style="padding:8px 0px"><div style="max-width:100%;margin:0px 16px;overflow:hidden"><div style="font-weight:500;font-size:12px;overflow:hidden;text-overflow:ellipsis;text-align:left"><a rel="nofollow" href="https://github.com/SCons/scons/wiki/ToolsForFools" style="text-decoration:none" target="_blank"><font color="#FFFFFF" style="color:rgb(255,255,255)">ToolsForFools</font></a></div><div style="font-weight:400;font-size:11px;overflow:hidden;text-overflow:ellipsis;text-align:left"><a rel="nofollow" href="https://github.com/SCons/scons/wiki/ToolsForFools" style="text-decoration:none" target="_blank"><font color="#FFFFFF" style="color:rgba(235,235,245,0.6)">github.com</font></a></div></div></td></tr></tbody></table></td></tr></tbody></table></a></div></div><br></div><div dir="ltr"><br><blockquote type="cite">On Mar 29, 2025, at 9:54 AM, Mats Wichmann <<a href="mailto:mats@wichmann.us" target="_blank">mats@wichmann.us</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><span>On 3/28/25 23:30, Oliver Koch via Scons-users wrote:</span><br><blockquote type="cite"><span>Dear Scons developers and users,</span><br></blockquote><blockquote type="cite"><span>I would like to set up a rather complex test framework to compare the</span><br></blockquote><blockquote type="cite"><span>changes between different versions (old vs. new) of an executable.</span><br></blockquote><blockquote type="cite"><span>The workflow also includes different steps (tools) to process resp.</span><br></blockquote><blockquote type="cite"><span>compare the output files.</span><br></blockquote><blockquote type="cite"><span>See the attached HTML file (resp. the according Markdown file).</span><br></blockquote><blockquote type="cite"><span>Any green box should be regarded as an independent component the can be</span><br></blockquote><blockquote type="cite"><span>changed by me. Any white box is a dependent file that is generated from</span><br></blockquote><blockquote type="cite"><span>the independents.</span><br></blockquote><blockquote type="cite"><span>The task is to create a dependency tree in SCons that re-generates the</span><br></blockquote><blockquote type="cite"><span>(necessary) final output files (b.out.diff resp.b.log.diff), if any of</span><br></blockquote><blockquote type="cite"><span>the dependent green boxes have been changed.</span><br></blockquote><blockquote type="cite"><span>I am struggeling with your documentation to conclude, how a SCons script</span><br></blockquote><blockquote type="cite"><span>should look like for the above purpose, since I am not using any</span><br></blockquote><blockquote type="cite"><span>classical compiler or linker in this workflow.</span><br></blockquote><blockquote type="cite"><span>Could you indicate me, how the shown dependency tree must be implemented</span><br></blockquote><blockquote type="cite"><span>with a SCons script?</span><br></blockquote><blockquote type="cite"><span>(And maybe explain a little bit why?)</span><br></blockquote><span>The way you declare a dependency with an associated action is to call a "builder": B depends on A, and if A is computed to be out of date, apply Action to create/recreate B.</span><br><span></span><br><span>SCons has a bunch of pre-made builders to anticipate things people are likely to do, but in your case, none are going to apply, so you'll need to write you own builders, or use the builder-like Command function if you can.</span><br><span></span><br><span>Command is much simpler because it works as a one-shot, while true builders require quite a bit more plumbing setup. Rather than go on about that, there are two chapters in the User Guide you can scan, then come back with more questions:</span><br><span></span><br><span>Writing Your Own Builders:</span><br><span><a href="https://scons.org/doc/production/HTML/scons-user.html#chap-builders-writing" target="_blank">https://scons.org/doc/production/HTML/scons-user.html#chap-builders-writing</a></span><br><span></span><br><span>Not Writing Builders:</span><br><span><a href="https://scons.org/doc/production/HTML/scons-user.html#chap-builders-commands" target="_blank">https://scons.org/doc/production/HTML/scons-user.html#chap-builders-commands</a></span><br><span></span><br><span></span><br><span>_______________________________________________</span><br><span>Scons-users mailing list</span><br><span><a href="mailto:Scons-users@scons.org" target="_blank">Scons-users@scons.org</a></span><br><span><a href="https://pairlist4.pair.net/mailman/listinfo/scons-users" target="_blank">https://pairlist4.pair.net/mailman/listinfo/scons-users</a></span><br></div></blockquote></div></div>_______________________________________________<br>
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