Ship Homebrew auto-update support.

Roll this out to everyone (not just developers) and document the
environment variables used for configuration.

4 files changed, 25 insertions, 1 deletions

diff --git a/Library/Homebrew/brew.sh b/Library/Homebrew/brew.sh
index edbc8db05..bf8985ffa 100644
--- a/Library/Homebrew/brew.sh
+++ b/Library/Homebrew/brew.sh
@@ -227,7 +227,6 @@ setup-analytics
 report-analytics-screenview-command
 
 update-preinstall() {
-  [[ -n "$HOMEBREW_DEVELOPER" ]] || return
   [[ -z "$HOMEBREW_NO_AUTO_UPDATE" ]] || return
   [[ -z "$HOMEBREW_UPDATE_PREINSTALL" ]] || return
 
diff --git a/Library/Homebrew/manpages/brew.1.md.erb b/Library/Homebrew/manpages/brew.1.md.erb
index affac9295..65344f8d0 100644
--- a/Library/Homebrew/manpages/brew.1.md.erb
+++ b/Library/Homebrew/manpages/brew.1.md.erb
@@ -108,6 +108,11 @@ can take several different forms:
   * `HOMEBREW_ARTIFACT_DOMAIN`:
     If set, instructs Homebrew to use the given URL as a download mirror for bottles and binaries.
 
+  * `HOMEBREW_AUTO_UPDATE_SECS`:
+    If set, Homebrew will only check for autoupdates once per this seconds interval.
+
+    *Default:* `60`.
+
   * `HOMEBREW_BROWSER`:
     If set, uses this setting as the browser when opening project homepages,
     instead of the OS default browser.
@@ -172,6 +177,10 @@ can take several different forms:
   * `HOMEBREW_NO_ANALYTICS`:
     If set, Homebrew will not send analytics. See: <https://github.com/Homebrew/brew/blob/master/share/doc/homebrew/Analytics.md#analytics>
 
+  * `HOMEBREW_NO_AUTO_UPDATE`:
+    If set, Homebrew will not auto-update before running `brew install` and
+    `brew upgrade`.
+
   * `HOMEBREW_NO_EMOJI`:
     If set, Homebrew will not print the `HOMEBREW_INSTALL_BADGE` on a
     successful build.
diff --git a/share/doc/homebrew/brew.1.html b/share/doc/homebrew/brew.1.html
index b9b6bf3c0..a93eeb2a3 100644
--- a/share/doc/homebrew/brew.1.html
+++ b/share/doc/homebrew/brew.1.html
@@ -529,6 +529,9 @@ a Homebrew-built Git if installed, or the system-provided binary.</p>
 <p>Set this to force Homebrew to use a particular git binary.</p></dd>
 <dt><code>HOMEBREW_BOTTLE_DOMAIN</code></dt><dd><p>If set, instructs Homebrew to use the given URL as a download mirror for bottles.</p></dd>
 <dt><code>HOMEBREW_ARTIFACT_DOMAIN</code></dt><dd><p>If set, instructs Homebrew to use the given URL as a download mirror for bottles and binaries.</p></dd>
+<dt><code>HOMEBREW_AUTO_UPDATE_SECS</code></dt><dd><p>If set, Homebrew will only check for autoupdates once per this seconds interval.</p>
+
+<p><em>Default:</em> <code>60</code>.</p></dd>
 <dt><code>HOMEBREW_BROWSER</code></dt><dd><p>If set, uses this setting as the browser when opening project homepages,
 instead of the OS default browser.</p></dd>
 <dt><code>HOMEBREW_BUILD_FROM_SOURCE</code></dt><dd><p>If set, instructs Homebrew to compile from source even when a formula
@@ -567,6 +570,8 @@ the number of parallel jobs to run when building with <code>make</code>(1).</p>
 
 <p><em>Default:</em> the number of available CPU cores.</p></dd>
 <dt><code>HOMEBREW_NO_ANALYTICS</code></dt><dd><p>If set, Homebrew will not send analytics. See: <a href="https://github.com/Homebrew/brew/blob/master/share/doc/homebrew/Analytics.md#analytics" data-bare-link="true">https://github.com/Homebrew/brew/blob/master/share/doc/homebrew/Analytics.md#analytics</a></p></dd>
+<dt><code>HOMEBREW_NO_AUTO_UPDATE</code></dt><dd><p>If set, Homebrew will not auto-update before running <code>brew install</code> and
+<code>brew upgrade</code>.</p></dd>
 <dt><code>HOMEBREW_NO_EMOJI</code></dt><dd><p>If set, Homebrew will not print the <code>HOMEBREW_INSTALL_BADGE</code> on a
 successful build.</p>
 
diff --git a/share/man/man1/brew.1 b/share/man/man1/brew.1
index f3c5f3899..e7eeb7793 100644
--- a/share/man/man1/brew.1
+++ b/share/man/man1/brew.1
@@ -722,6 +722,13 @@ If set, instructs Homebrew to use the given URL as a download mirror for bottles
 If set, instructs Homebrew to use the given URL as a download mirror for bottles and binaries\.
 .
 .TP
+\fBHOMEBREW_AUTO_UPDATE_SECS\fR
+If set, Homebrew will only check for autoupdates once per this seconds interval\.
+.
+.IP
+\fIDefault:\fR \fB60\fR\.
+.
+.TP
 \fBHOMEBREW_BROWSER\fR
 If set, uses this setting as the browser when opening project homepages, instead of the OS default browser\.
 .
@@ -786,6 +793,10 @@ If set, instructs Homebrew to use the value of \fBHOMEBREW_MAKE_JOBS\fR as the n
 If set, Homebrew will not send analytics\. See: \fIhttps://github\.com/Homebrew/brew/blob/master/share/doc/homebrew/Analytics\.md#analytics\fR
 .
 .TP
+\fBHOMEBREW_NO_AUTO_UPDATE\fR
+If set, Homebrew will not auto\-update before running \fBbrew install\fR and \fBbrew upgrade\fR\.
+.
+.TP
 \fBHOMEBREW_NO_EMOJI\fR
 If set, Homebrew will not print the \fBHOMEBREW_INSTALL_BADGE\fR on a successful build\.
 .