Add a README.md to textparse package about how to update lexers.

Signed-off-by: Callum Styan <callumstyan@gmail.com>
5 years ago · 54e3fc82f1
1 changed files with 6 additions and 0 deletions
--- a/pkg/textparse/README.md
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+# Making changes to textparse lexers
+In the rare case that you need to update the textparse lexers, edit promlex.l or openmetricslex.l and then run the following command: 
+`golex -o=promlex.l.go promlex.l`
+
+Note that you need golex installed: 
+`go get -u modernc.org/golex`