Add how to load extra variables directly from a file (using @).

bcbf819a · Giovanni Tirloni · 932fd2ed · bcbf819a
Commit bcbf819a authored Feb 12, 2015 by Giovanni Tirloni
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docs/man/man1/ansible-playbook.1.asciidoc.in
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--- a/docs/man/man1/ansible-playbook.1.asciidoc.in
+++ b/docs/man/man1/ansible-playbook.1.asciidoc.in
@@ -54,7 +54,8 @@ environment variable.
 *-e* 'VARS', *--extra-vars=*'VARS'::

 Extra variables to inject into a playbook, in key=value key=value format or
-as quoted JSON (hashes and arrays).
+as quoted JSON (hashes and arrays). To load variables from a file, specify
+the file preceded by @ (e.g. @vars.yml).

 *-f* 'NUM', *--forks=*'NUM'::