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doc/manual/hacking: Document @docroot@ variable

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This commit is contained in:
Robert Hensing 2023-01-03 11:36:01 +01:00
parent fefa3a49ce
commit da4d4feacf
2 changed files with 11 additions and 2 deletions
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3
doc/manual/local.mk
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@ -51,11 +51,13 @@ $(d)/src/SUMMARY.md: $(d)/src/SUMMARY.md.in $(d)/src/command-ref/new-cli
$(d)/src/command-ref/new-cli: $(d)/nix.json $(d)/generate-manpage.nix $(bindir)/nix
@rm -rf $@
$(trace-gen) $(nix-eval) --write-to $@.tmp --expr 'import doc/manual/generate-manpage.nix { toplevel = builtins.readFile $<; }'
# @docroot@: https://nixos.org/manual/nix/unstable/contributing/hacking.html#docroot-variable
$(trace-gen) sed -i $@.tmp/*.md -e 's^@docroot@^../..^g'
@mv $@.tmp $@
$(d)/src/command-ref/conf-file.md: $(d)/conf-file.json $(d)/generate-options.nix $(d)/src/command-ref/conf-file-prefix.md $(bindir)/nix
@cat doc/manual/src/command-ref/conf-file-prefix.md > $@.tmp
# @docroot@: https://nixos.org/manual/nix/unstable/contributing/hacking.html#docroot-variable
$(trace-gen) $(nix-eval) --expr 'import doc/manual/generate-options.nix (builtins.fromJSON (builtins.readFile $<))' \
| sed -e 's^@docroot@^..^g'>> $@.tmp
@mv $@.tmp $@
@ -70,6 +72,7 @@ $(d)/conf-file.json: $(bindir)/nix
$(d)/src/language/builtins.md: $(d)/builtins.json $(d)/generate-builtins.nix $(d)/src/language/builtins-prefix.md $(bindir)/nix
@cat doc/manual/src/language/builtins-prefix.md > $@.tmp
# @docroot@: https://nixos.org/manual/nix/unstable/contributing/hacking.html#docroot-variable
$(trace-gen) $(nix-eval) --expr 'import doc/manual/generate-builtins.nix (builtins.fromJSON (builtins.readFile $<))' \
| sed -e 's^@docroot@^..^g' >> $@.tmp
@cat doc/manual/src/language/builtins-suffix.md >> $@.tmp

10
doc/manual/src/contributing/hacking.md
View file

@ -268,9 +268,15 @@ In order to reflect changes to the [Makefile], clear all generated files before
rm $(git ls-files doc/manual/ -o | grep -F '.md') && rmdir doc/manual/src/command-ref/new-cli && make html -j $NIX_BUILD_CORES
```
If a broken link occurs in a snippet that was inserted into multiple generated files in different directories, use `@docroot@` to reference the `doc/manual/src` directory.
[`mdbook-linkcheck`] does not implement checking [URI fragments] yet.
[`mdbook-linkcheck`]: https://github.com/Michael-F-Bryan/mdbook-linkcheck
[URI fragments]: https://en.m.wikipedia.org/wiki/URI_fragment
#### `@docroot@` variable
`@docroot@` provides a base path for links that occur in reusable snippets or other documentation that doesn't have a base path of its own.
If a broken link occurs in a snippet that was inserted into multiple generated files in different directories, use `@docroot@` to reference the `doc/manual/src` directory.
If the `@docroot@` literal appears in an error message from the `mdbook-linkcheck` tool, the `@docroot@` replacement needs to be applied to the (probably) generated source file that mentions it. See existing `@docroot@` logic in the [Makefile]. Regular markdown files that are not copied to other markdown files do have a base path of their own and they can use relative paths instead of `@docroot@`.