build: reduce noise from doc target

The doc target currently echos the complete shell command, which might produces a lot of output. Using this change the actual commands run are still shown. Before: [ -e tools/doc/node_modules/js-yaml/package.json ] || \ [ -e tools/eslint/node_modules/js-yaml/package.json ] || \ if [ -x ./node ]; then \ cd tools/doc && ../.././node ../.././deps/npm/bin/npm-cli.js install; \ else \ cd tools/doc && node ../.././deps/npm/bin/npm-cli.js install; \ fi [ -x ./node ] && ./node tools/doc/generate.js --node-version=v8.0.0 --format=html --template=doc/template.html doc/api/assert.md > out/doc/api/assert.html || node tools/doc/generate.js --node-version=v8.0.0 --format=html --template=doc/template.html doc/api/assert.md > out/doc/api/assert.html Input file = doc/api/assert.md After: [ -x ./node ] && ./node tools/doc/generate.js --node-version=v8.0.0 --format=html --template=doc/template.html doc/api/assert.md > out/doc/api/assert.html || node tools/doc/generate.js --node-version=v8.0.0 --format=html --template=doc/template.html doc/api/assert.md > out/doc/api/assert.html Input file = doc/api/assert.md To verify run: $ make docclean $ make doc PR-URL: #9457 Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Jeremiah Senkpiel <[email protected]> Reviewed-By: James Snell <[email protected]>

Author: danbev

Makefile

@@ -284,7 +284,7 @@ out/doc/%: doc/%
 # check if ./node is actually set, else use user pre-installed binary
 gen-json = tools/doc/generate.js --format=json $< > $@
 out/doc/api/%.json: doc/api/%.md
- [ -e tools/doc/node_modules/js-yaml/package.json ] ||\
+@[ -e tools/doc/node_modules/js-yaml/package.json ] ||\
  [ -e tools/eslint/node_modules/js-yaml/package.json ] ||\
 if [ -x$(NODE) ];then \
 cd tools/doc && ../../$(NODE) ../../$(NPM) install;\
@@ -296,7 +296,7 @@ out/doc/api/%.json: doc/api/%.md
 # check if ./node is actually set, else use user pre-installed binary
 gen-html = tools/doc/generate.js --node-version=$(FULLVERSION) --format=html --template=doc/template.html $< > $@
 out/doc/api/%.html: doc/api/%.md
- [ -e tools/doc/node_modules/js-yaml/package.json ] ||\
+@[ -e tools/doc/node_modules/js-yaml/package.json ] ||\
  [ -e tools/eslint/node_modules/js-yaml/package.json ] ||\
 if [ -x$(NODE) ];then \
 cd tools/doc && ../../$(NODE) ../../$(NPM) install;\