[devdocsgjs/main: 1020/1867] Find steps that work on macOS

[Andy Holmes <andyholmes src gnome org>]

commit 370261bb1f241c77c20fff9dcc0b998b12d582c6
Author: Jed Fox <git twopointzero us>
Date:   Tue Jan 14 12:22:49 2020 -0500

    Find steps that work on macOS

 docs/file-scrapers.md | 33 ++++++++++++++++++++++++++-------
 1 file changed, 26 insertions(+), 7 deletions(-)
---
diff --git a/docs/file-scrapers.md b/docs/file-scrapers.md
index bf047688..8bbc4afe 100644
--- a/docs/file-scrapers.md
+++ b/docs/file-scrapers.md
@@ -36,24 +36,43 @@ Go to https://www.erlang.org/downloads and download the HTML documentation file.
 
 ## Gnuplot
 
-NOTE: these steps may not work on macOS.
-
-Find the most recent tagged version on https://sourceforge.net/p/gnuplot/gnuplot-main/ref/master/tags/
-and change `1.2.3` below to that tag when running the clone.
+The most recent release can be found near the bottom of
+https://sourceforge.net/p/gnuplot/gnuplot-main/ref/master/tags/
 
 ```sh
 DEVDOCS_ROOT=/path/to/devdocs
-mkdir gnuplot-src gnuplot-conf $DEVDOCS_ROOT/docs/gnuplot
+mkdir gnuplot-src $DEVDOCS_ROOT/docs/gnuplot
 git clone -b $RELEASE --depth 1 https://git.code.sf.net/p/gnuplot/gnuplot-main ./gnuplot-src
 cd gnuplot-src/
 ./prepare
-cd ../gnuplot-conf
-../gnuplot-src/configure
+./configure
 cd docs/
 make nofigures.tex
 latex2html -html 5.0,math -split 4 -link 8 -long_titles 5 -dir $DEVDOCS_ROOT/docs/gnuplot -ascii_mode 
-no_auto_link nofigures.tex
 ```
 
+To install `latex2html` on macOS: `brew install basictex latex2html`, then edit
+`/usr/local/Cellar/latex2html/2019.2/l2hconf.pm` to include the path to LaTeX:
+
+<details>
+
+On line 21 (approximately):
+
+```
+#  Give the paths to latex and dvips on your system:
+#
+$LATEX = '/Library/TeX/texbin/latex';  # LaTeX
+$PDFLATEX = '/Library/TeX/texbin/pdflatex';    # pdfLaTeX
+$LUALATEX = '/Library/TeX/texbin/lualatex';    # LuaLaTeX
+$DVILUALATEX = '/Library/TeX/texbin/dvilualatex';      # dviLuaLaTeX
+$DVIPS = '/Library/TeX/texbin/dvips';  # dvips
+$DVIPNG = '';  # dvipng
+$PDFTOCAIRO = '/usr/local/bin/pdf2svg';        # pdf to svg converter
+$PDFCROP = ''; # pdfcrop
+$GS = '/usr/local/opt/ghostscript/bin/gs';     # GhostScript
+```
+</details>
+
 ## NumPy
 
 ## OpenJDK