add method to detect shell profile file based on users' preference shell

Closes Homebrew/homebrew#38017.

Signed-off-by: Xu Cheng <xucheng@me.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/Library/Homebrew/utils.rb b/Library/Homebrew/utils.rb
index 4b2feb053..2cdd920c9 100644
--- a/Library/Homebrew/utils.rb
+++ b/Library/Homebrew/utils.rb
@@ -291,6 +291,16 @@ def paths
   end.uniq.compact
 end
 
+# return the shell profile file based on users' preference shell
+def shell_profile
+  case ENV["SHELL"]
+  when %r{/(ba)?sh} then "~/.bash_profile"
+  when %r{/zsh} then "~/.zshrc"
+  when %r{/ksh} then "~/.kshrc"
+  else "~/.bash_profile"
+  end
+end
+
 module GitHub extend self
   ISSUES_URI = URI.parse("https://api.github.com/search/issues")