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How does NSIS set the partition size automatically?

We have an installer with several components, each of which has its own section. I am trying to figure out how our existing code actually sets the size of each section. We have 3 components that, if / is not checked, will update the "Space required" value on the component page.

The new section that I have added currently does not update this value. What I cannot find in our existing code is where it really is installed.

I did some research and found this post below, where the user said "size is automatically set." But how? https://nsis-dev.imtqy.com/NSIS-Forums/html/t-291064.html

I looked through NSIS docs and saw some ways to install this, including:

  • AddSize
  • SectionSetSize

You can even use CopyFilesit to set an estimated file size, which can then be used by the installer.

I searched our NSIS directory for all of the above methods and could not get any results for AddSizeor SectionSetSize. I also did not see examples CopyFileswhere the developer added the estimated space in kilobytes. Is there some kind of NSIS mask that automatically sets this size that I don't know about?

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NSIS automatically sets the partition size according to the instructions Filein this section.

AddSize , , , . SectionSetSize , , .

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Source: https://habr.com/ru/post/1650080/

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