commit e4383ef1a52988e43761897db34b2883236b5e77
author Roman Arutyunyan <arut@nginx.com> Thu Dec 21 13:29:40 2017 +0300
committer Roman Arutyunyan <arut@nginx.com> Thu Dec 21 13:29:40 2017 +0300
tree 03428d14da482461126e0c0be5cb6e892bb49fad
parent 89a48b00f4377e9ee0f74786700136b5274e1b4e

Allowed configuration token to start with a variable.

Specifically, it is now allowed to start with a variable expression with braces:
${name}.  The opening curly bracket in such a token was previously considered
the start of a new block.  Variables located anywhere else in a token worked
fine: foo${name}.

src/core/ngx_conf_file.c

diff --git a/src/core/ngx_conf_file.c b/src/core/ngx_conf_file.c
index fb28a5a..ba454de 100644
--- a/src/core/ngx_conf_file.c
+++ b/src/core/ngx_conf_file.c
@@ -709,6 +709,11 @@
                 last_space = 0;
                 continue;
 
+            case '$':
+                variable = 1;
+                last_space = 0;
+                continue;
+
             default:
                 last_space = 0;
             }