I've installed `gradle` on MAC using terminal.

`brew install gradle`

Gradle has been installed successfully.

```
gradle -v

------------------------------------------------------------
Gradle 3.3
------------------------------------------------------------

Build time:   2017-01-03 15:31:04 UTC
Revision:     075893a3d0798c0c1f322899b41ceca82e4e134b

Groovy:       2.4.7
Ant:          Apache Ant(TM) version 1.9.6 compiled on June 29 2015
JVM:          1.8.0_112 (Oracle Corporation 25.112-b16)
OS:           Mac OS X 10.12.3 x86_64

```

but I can not find gradle home.

```
echo $GRADLE_HOME
[empty result]

```

the first step to determine home directory is detect location of `gradle` instruction:

```
which gradle
/usr/local/bin/gradle

```

there is incomprehensible bash file.

---

Any ideas how to detect gradle home directory via terminal?