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-rw-r--r--doc/src/guide/app.asciidoc5
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/src/guide/app.asciidoc b/doc/src/guide/app.asciidoc
index ca0a993..229ce97 100644
--- a/doc/src/guide/app.asciidoc
+++ b/doc/src/guide/app.asciidoc
@@ -132,6 +132,11 @@ your situation.
List of the names of all registered processes.
`PROJECT_ENV`::
Configuration parameters used by the application.
+`PROJECT_APP_EXTRA_KEYS`::
+ Other keys you want to add to the application `.app` file.
+ The variable content is written as-is to the `.app` file,
+ so be sure to format valid Erlang terms. For example:
+ `PROJECT_APP_EXTRA_KEYS = {maxT, 10000}, {start_phases, [...]}`.
`LOCAL_DEPS`::
List of Erlang/OTP applications this project depends on,
excluding `erts`, `kernel` and `stdlib`, or list of