admin/brew
1
0
Fork 0
Code Issues Packages Projects Releases 6 Wiki Activity

Merge pull request #9318 from mistydemeo/add_with_env_to_docs

Browse Source 
Formula cookbook: document with_env
This commit is contained in:
Mike McQuaid 2020-11-30 13:06:30 +00:00 committed by GitHub
commit ce8559a1bd
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Library/Homebrew/utils.rb
View File

@ -488,6 +488,7 @@ module Kernel
# @note This method is *not* thread-safe - other threads # @note This method is *not* thread-safe - other threads
# which happen to be scheduled during the block will also # which happen to be scheduled during the block will also
# see these environment variables. # see these environment variables.
# @api public
def with_env(hash) def with_env(hash)
old_values = {} old_values = {}
begin begin

2
docs/Formula-Cookbook.md
View File

@ -757,7 +757,7 @@ Firstly, the overall environment in which Homebrew runs is filtered to avoid env
The second level of filtering removes sensitive environment variables (such as credentials like keys, passwords or tokens) to avoid malicious subprocesses obtaining them (<https://github.com/Homebrew/brew/pull/2524>). This has the effect of preventing any such variables from reaching a formula's Ruby code as they are filtered before it is called. The specific implementation can be seen in the [`ENV.clear_sensitive_environment!` method](https://github.com/Homebrew/brew/blob/HEAD/Library/Homebrew/extend/ENV.rb). The second level of filtering removes sensitive environment variables (such as credentials like keys, passwords or tokens) to avoid malicious subprocesses obtaining them (<https://github.com/Homebrew/brew/pull/2524>). This has the effect of preventing any such variables from reaching a formula's Ruby code as they are filtered before it is called. The specific implementation can be seen in the [`ENV.clear_sensitive_environment!` method](https://github.com/Homebrew/brew/blob/HEAD/Library/Homebrew/extend/ENV.rb).
You can set environment variables in a formula's `install` method using `ENV["VARIABLE_NAME"] = "VALUE"`. An example can be seen in [the `gh` formula](https://github.com/Homebrew/homebrew-core/blob/fd9ad29f8e3ca9476f838ebb13794ddb7dafba00/Formula/gh.rb#L22). You can set environment variables in a formula's `install` method using `ENV["VARIABLE_NAME"] = "VALUE"`. An example can be seen in [the `gh` formula](https://github.com/Homebrew/homebrew-core/blob/fd9ad29f8e3ca9476f838ebb13794ddb7dafba00/Formula/gh.rb#L22). Environment variables can also be set temporarily using the `with_env` method; any variables defined in the call to that method will be restored to their original values at the end of the block. An example can be seen in [the `csound` formula](https://github.com/Homebrew/homebrew-core/blob/c3feaff8cdb578331385676620c865796cfc3388/Formula/csound.rb#L155-L157).
In summary, environment variables used by a formula need to conform to these filtering rules in order to be available. In summary, environment variables used by a formula need to conform to these filtering rules in order to be available.