I'm just curious: is that some kind of successor to gtk-doc?

DevHelp is a documentation viewer. It can read content generated by gtk-doc, provided that index file is added to share/devhelp/books.

Currently testing by building libhttpseverywhere from #30352 with fixupPhase removed.

@jtojnar Could you show ls /run/current-system/sw/share/devhelp/books on your system?

@orivej Personally, I do not have any books installed. We need it for libhttpseverywhere (#30352) and other tools which install them.

OK, nix-index shows that these derivations install devhelp books, currently in out: gnome2.libglademm gnome3.vala libxmlxx libxmlxx3 vala_0_23 vala_0_26 vala_0_28 vala_0_34 vala_0_38. Please make sure that all of them define devdoc output, and update doc/multiple-output.xml.

Done, though I am unable to build it now.

Also did you omit vala_0_32 accidentally?

Also did you omit vala_0_32 accidentally?

I've refreshed nix-index before querying, but nix-locate did not list vala_0_32, don't know why.

I think that the part of doc/multiple-output.xml that mentions gtk-doc should be updated.

I updated it with the stdenv update.

I've refreshed nix-index before querying, but nix-locate did not list vala_0_32, don't know why.

@orivej: the directory is there on master. If you don't define an output for dev docs, they get removed by default. EDIT: could that be the reason?

@vcunat I don't see any reason why vala_0_32 may be absent from nix-index while vala_0_28 et al. are present (and vala_0_32 is in the binary cache). /cc @bennofs

@vcunat @orivej gnome3.vala is the same as vala_0_32, and nix-index lists the former one:

gnome3.vala.out                                       1 d /nix/store/hjcp5p1w5c5mjqsa75vypcaq398lz9n4-vala-0.32.1/share/devhelp/books