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lix/doc/manual/local.mk
John Ericson 53d0836347 Assemble experimental feature docs outside of Nix itself 
Instead of constructing a markdown list in C++ (which involved all sorts
of nasty string literals), export some JSON and assemble it with the
manual build system.

Besides following the precedent set with other dumped data, this is a
better separate of content and presentation; if we decide for example we
want to display this information in a different way, or in a different
section of the manual, it will become much easier to do so.
2023-04-04 22:57:11 -04:00

177 lines
7.1 KiB
Makefile
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ifeq ($(doc_generate),yes)
MANUAL_SRCS := \
$(call rwildcard, $(d)/src, *.md) \
$(call rwildcard, $(d)/src, */*.md)
man-pages := $(foreach n, \
nix-env.1 nix-store.1 \
nix-build.1 nix-shell.1 nix-instantiate.1 \
nix-collect-garbage.1 \
nix-prefetch-url.1 nix-channel.1 \
nix-hash.1 nix-copy-closure.1 \
nix.conf.5 nix-daemon.8 \
, $(d)/$(n))
# man pages for subcommands
# convert from `$(d)/src/command-ref/nix-{1}/{2}.md` to `$(d)/nix-{1}-{2}.1`
# FIXME: unify with how nix3-cli man pages are generated
man-pages += $(foreach subcommand, \
$(filter-out %opt-common.md %env-common.md, $(wildcard $(d)/src/command-ref/nix-*/*.md)), \
$(d)/$(subst /,-,$(subst $(d)/src/command-ref/,,$(subst .md,.1,$(subcommand)))))
clean-files += $(d)/*.1 $(d)/*.5 $(d)/*.8
# Provide a dummy environment for nix, so that it will not access files outside the macOS sandbox.
# Set cores to 0 because otherwise nix show-config resolves the cores based on the current machine
dummy-env = env -i \
HOME=/dummy \
NIX_CONF_DIR=/dummy \
NIX_SSL_CERT_FILE=/dummy/no-ca-bundle.crt \
NIX_STATE_DIR=/dummy \
NIX_CONFIG='cores = 0'
nix-eval = $(dummy-env) $(bindir)/nix eval --experimental-features nix-command -I nix/corepkgs=corepkgs --store dummy:// --impure --raw
# re-implement mdBook's include directive to make it usable for terminal output and for proper @docroot@ substitution
define process-includes
while read -r line; do \
set -euo pipefail; \
filename="$$(dirname $(1))/$$(sed 's/{{#include \(.*\)}}/\1/'<<< $$line)"; \
test -f "$$filename" || ( echo "#include-d file '$$filename' does not exist." >&2; exit 1; ); \
matchline="$$(sed 's|/|\\/|g' <<< $$line)"; \
sed -i "/$$matchline/r $$filename" $(2); \
sed -i "s/$$matchline//" $(2); \
done < <(grep '{{#include' $(1))
endef
$(d)/nix-env-%.1: $(d)/src/command-ref/nix-env/%.md
@printf "Title: %s\n\n" "$(subst nix-env-,nix-env --,$$(basename "$@" .1))" > $^.tmp
$(render-subcommand)
$(d)/nix-store-%.1: $(d)/src/command-ref/nix-store/%.md
@printf -- 'Title: %s\n\n' "$(subst nix-store-,nix-store --,$$(basename "$@" .1))" > $^.tmp
$(render-subcommand)
# FIXME: there surely is some more deduplication to be achieved here with even darker Make magic
define render-subcommand
@cat $^ >> $^.tmp
@$(call process-includes,$^,$^.tmp)
$(trace-gen) lowdown -sT man --nroff-nolinks -M section=1 $^.tmp -o $@
@# fix up `lowdown`'s automatic escaping of `--`
@# https://github.com/kristapsdz/lowdown/blob/edca6ce6d5336efb147321a43c47a698de41bb7c/entity.c#L202
@sed -i 's/\e\[u2013\]/--/' $@
@rm $^.tmp
endef
$(d)/%.1: $(d)/src/command-ref/%.md
@printf "Title: %s\n\n" "$$(basename $@ .1)" > $^.tmp
@cat $^ >> $^.tmp
@$(call process-includes,$^,$^.tmp)
$(trace-gen) lowdown -sT man --nroff-nolinks -M section=1 $^.tmp -o $@
@rm $^.tmp
$(d)/%.8: $(d)/src/command-ref/%.md
@printf "Title: %s\n\n" "$$(basename $@ .8)" > $^.tmp
@cat $^ >> $^.tmp
$(trace-gen) lowdown -sT man --nroff-nolinks -M section=8 $^.tmp -o $@
@rm $^.tmp
$(d)/nix.conf.5: $(d)/src/command-ref/conf-file.md
@printf "Title: %s\n\n" "$$(basename $@ .5)" > $^.tmp
@cat $^ >> $^.tmp
$(trace-gen) lowdown -sT man --nroff-nolinks -M section=5 $^.tmp -o $@
@rm $^.tmp
$(d)/src/SUMMARY.md: $(d)/src/SUMMARY.md.in $(d)/src/command-ref/new-cli
@cp $< $@
@$(call process-includes,$@,$@)
$(d)/src/command-ref/new-cli: $(d)/nix.json $(d)/utils.nix $(d)/generate-manpage.nix $(bindir)/nix
@rm -rf $@ $@.tmp
$(trace-gen) $(nix-eval) --write-to $@.tmp --expr 'import doc/manual/generate-manpage.nix (builtins.readFile $<)'
@mv $@.tmp $@
$(d)/src/command-ref/conf-file.md: $(d)/conf-file.json $(d)/utils.nix $(d)/src/command-ref/conf-file-prefix.md $(d)/src/command-ref/experimental-features.md $(bindir)/nix
@cat doc/manual/src/command-ref/conf-file-prefix.md > $@.tmp
$(trace-gen) $(nix-eval) --expr '(import doc/manual/utils.nix).showSettings { useAnchors = true; } (builtins.fromJSON (builtins.readFile $<))' >> $@.tmp;
@mv $@.tmp $@
$(d)/nix.json: $(bindir)/nix
$(trace-gen) $(dummy-env) $(bindir)/nix __dump-cli > $@.tmp
@mv $@.tmp $@
$(d)/conf-file.json: $(bindir)/nix
$(trace-gen) $(dummy-env) $(bindir)/nix show-config --json --experimental-features nix-command > $@.tmp
@mv $@.tmp $@
$(d)/src/command-ref/experimental-features.md: $(d)/xp-features.json $(d)/utils.nix $(d)/generate-xp-features.nix $(bindir)/nix
@rm -rf $@ $@.tmp
$(trace-gen) $(nix-eval) --write-to $@.tmp --expr 'import doc/manual/generate-xp-features.nix (builtins.fromJSON (builtins.readFile $<))'
@mv $@.tmp $@
$(d)/xp-features.json: $(bindir)/nix
$(trace-gen) $(dummy-env) NIX_PATH=nix/corepkgs=corepkgs $(bindir)/nix __dump-xp-features > $@.tmp
@mv $@.tmp $@
$(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
$(trace-gen) $(nix-eval) --expr 'import doc/manual/generate-builtins.nix (builtins.fromJSON (builtins.readFile $<))' >> $@.tmp;
@cat doc/manual/src/language/builtins-suffix.md >> $@.tmp
@mv $@.tmp $@
$(d)/builtins.json: $(bindir)/nix
$(trace-gen) $(dummy-env) NIX_PATH=nix/corepkgs=corepkgs $(bindir)/nix __dump-builtins > $@.tmp
@mv $@.tmp $@
# Generate the HTML manual.
.PHONY: manual-html
manual-html: $(docdir)/manual/index.html
install: $(docdir)/manual/index.html
# Generate 'nix' manpages.
install: $(mandir)/man1/nix3-manpages
man: doc/manual/generated/man1/nix3-manpages
all: doc/manual/generated/man1/nix3-manpages
# FIXME: unify with how the other man pages are generated.
# this one works differently and does not use any of the amenities provided by `/mk/lib.mk`.
$(mandir)/man1/nix3-manpages: doc/manual/generated/man1/nix3-manpages
@mkdir -p $(DESTDIR)$$(dirname $@)
$(trace-install) install -m 0644 $$(dirname $<)/* $(DESTDIR)$$(dirname $@)
doc/manual/generated/man1/nix3-manpages: $(d)/src/command-ref/new-cli
@mkdir -p $(DESTDIR)$$(dirname $@)
$(trace-gen) for i in doc/manual/src/command-ref/new-cli/*.md; do \
name=$$(basename $$i .md); \
tmpFile=$$(mktemp); \
if [[ $$name = SUMMARY ]]; then continue; fi; \
printf "Title: %s\n\n" "$$name" > $$tmpFile; \
cat $$i >> $$tmpFile; \
lowdown -sT man --nroff-nolinks -M section=1 $$tmpFile -o $(DESTDIR)$$(dirname $@)/$$name.1; \
rm $$tmpFile; \
done
@touch $@
$(docdir)/manual/index.html: $(MANUAL_SRCS) $(d)/book.toml $(d)/anchors.jq $(d)/custom.css $(d)/src/SUMMARY.md $(d)/src/command-ref/new-cli $(d)/src/command-ref/conf-file.md $(d)/src/language/builtins.md
$(trace-gen) \
tmp="$$(mktemp -d)"; \
cp -r doc/manual "$$tmp"; \
find "$$tmp" -name '*.md' | while read -r file; do \
$(call process-includes,$$file,$$file); \
done; \
find "$$tmp" -name '*.md' | while read -r file; do \
docroot="$$(realpath --relative-to="$$(dirname "$$file")" $$tmp/manual/src)"; \
sed -i "s,@docroot@,$$docroot,g" "$$file"; \
done; \
set -euo pipefail; \
RUST_LOG=warn mdbook build "$$tmp/manual" -d $(DESTDIR)$(docdir)/manual.tmp 2>&1 \
| { grep -Fv "because fragment resolution isn't implemented" || :; }; \
rm -rf "$$tmp/manual"
@rm -rf $(DESTDIR)$(docdir)/manual
@mv $(DESTDIR)$(docdir)/manual.tmp/html $(DESTDIR)$(docdir)/manual
@rm -rf $(DESTDIR)$(docdir)/manual.tmp
endif
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