1 SC3046

Vidar Holen edited this page 2020-09-01 17:18:33 -07:00

Table of Contents

• In POSIX sh, source in place of . is undefined.
• Problematic code:
• Correct code:
• Rationale:
• Exceptions:
• Related resources:

In POSIX sh, source in place of . is undefined.

(or "In dash, ... is not supported." when using dash)

Problematic code:

#!/bin/sh
source mylib.sh

Correct code:

#!/bin/sh
. mylib.sh

Rationale:

source is a bash and ksh specific alias for the harder-to-pronounce/search command . ("dot")

When writing for dash or sh, use . instead.

Exceptions:

If you only intend to target shells that supports this feature, you can change the shebang to a shell that guarantees support, or ignore this warning.

You can use # shellcheck disable=SC3000-SC4000 to ignore all such compatibility warnings.

Related resources:

• Help by adding links to BashFAQ, StackOverflow, man pages, POSIX, etc!

ShellCheck

• Installation

  • CentOS6
  • More Installation Guides

• Usage

  • Directive
  • Ignore

• Integrating and extending

  • Misc. contributions
  • Azure Pipelines
  • Buildkite
  • CircleCI
  • DevGuide
  • Integration
  • JUnit
  • Phabricator
  • TravisCI
  • GitLab CI
  • Drone
  • GitHub Actions

• Severity

• Template

Each individual ShellCheck warning has its own wiki page like SC1000. Use GitHub Wiki's "Pages" feature above to find a specific one, or see Checks.