Add HOMEBREW_INSTALL_BADGE environment variable

with which the beer emoji displayed upon successful build
can be changed.

Closes Homebrew/homebrew#23194.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Library/Contributions/manpages/brew.1.md

@@ -518,7 +518,8 @@ can take several different forms:
     *Default:* the number of available CPU cores.
 
   * HOMEBREW\_NO\_EMOJI:
-    If set, Homebrew will not print the beer emoji on a successful build.
+    If set, Homebrew will not print the `HOMEBREW_INSTALL_BADGE` on a
+    successful build.
 
     *Note:* Homebrew will only try to print emoji on Lion or newer.
 
@@ -526,6 +527,10 @@ can take several different forms:
     If set, Homebrew will not use the GitHub API for e.g searches or
     fetching relevant issues on a failed install.
 
+  * HOMEBREW\_INSTALL\_BADGE:
+    Text printed before the installation summary of each successful build.
+    Defaults to the beer emoji.
+
   * HOMEBREW\_SOURCEFORGE\_MIRROR:
     If set, Homebrew will use the value of `HOMEBREW_SOURCEFORGE_MIRROR` to
     select a SourceForge mirror for downloading bottles.

Library/Homebrew/formula_installer.rb

@@ -314,7 +314,7 @@ class FormulaInstaller
 
     ohai "Summary" if ARGV.verbose? or show_summary_heading
     unless ENV['HOMEBREW_NO_EMOJI']
-      print "\xf0\x9f\x8d\xba  " if MacOS.version >= :lion
+      print "#{ENV['HOMEBREW_INSTALL_BADGE'] || "\xf0\x9f\x8d\xba"}  " if MacOS.version >= :lion
     end
     print "#{f.prefix}: #{f.prefix.abv}"
     print ", built in #{pretty_duration build_time}" if build_time

share/man/man1/brew.1

@@ -549,7 +549,7 @@ If set, instructs Homebrew to use the value of \fBHOMEBREW_MAKE_JOBS\fR as the n
 .
 .TP
 HOMEBREW_NO_EMOJI
-If set, Homebrew will not print the beer emoji on a successful build\.
+If set, Homebrew will not print the \fBHOMEBREW_INSTALL_BADGE\fR on a successful build\.
 .
 .IP
 \fINote:\fR Homebrew will only try to print emoji on Lion or newer\.
@@ -559,6 +559,10 @@ HOMEBREW_NO_GITHUB_API
 If set, Homebrew will not use the GitHub API for e\.g searches or fetching relevant issues on a failed install\.
 .
 .TP
+HOMEBREW_INSTALL_BADGE
+Text printed before the installation summary of each successful build. Defaults to the beer emoji\.
+.
+.TP
 HOMEBREW_SOURCEFORGE_MIRROR
 If set, Homebrew will use the value of \fBHOMEBREW_SOURCEFORGE_MIRROR\fR to select a SourceForge mirror for downloading bottles\.
 .