Workflow syntax

From github/docs/content/actions/reference/workflows-and-actions/workflow-syntax.md?plain=1#L1276-L1341@c1ca049 which is covered by the Creative Commons Attribution 4.0 license from github/docs/LICENSE@c1ca049 (also included in-repo in the adjacent LICENSE file). Only automated formatting changes (e.g., prettier) have been applied to the content below.

Filter pattern cheat sheet

You can use special characters in path, branch, and tag filters.

• *: Matches zero or more characters, but does not match the / character. For example, Octo* matches Octocat.
• **: Matches zero or more of any character.
• ?: Matches zero or one of the preceding character.
• +: Matches one or more of the preceding character.
• [] Matches one alphanumeric character listed in the brackets or included in ranges. Ranges can only include a-z, A-Z, and 0-9. For example, the range[0-9a-z] matches any digit or lowercase letter. For example, [CB]at matches Cat or Bat and [1-2]00 matches 100 and 200.
• !: At the start of a pattern makes it negate previous positive patterns. It has no special meaning if not the first character.

The characters *, [, and ! are special characters in YAML. If you start a pattern with *, [, or !, you must enclose the pattern in quotes. Also, if you use a flow sequence with a pattern containing [ and/or ], the pattern must be enclosed in quotes.

# Valid
paths:
  - '**/README.md'

# Invalid - creates a parse error that
# prevents your workflow from running.
paths:
  - **/README.md

# Valid
branches: [ main, 'release/v[0-9].[0-9]' ]

# Invalid - creates a parse error
branches: [ main, release/v[0-9].[0-9] ]

For more information about branch, tag, and path filter syntax, see on.<push>.<branches|tags>, on.<pull_request>.<branches|tags>, and on.<push|pull_request>.paths.

Patterns to match branches and tags

Pattern	Description	Example matches
feature/*	The * wildcard matches any character, but does not match slash (/).	feature/my-branch feature/your-branch
feature/**	The ** wildcard matches any character including slash (/) in branch and tag names.	feature/beta-a/my-branch feature/your-branch feature/mona/the/octocat
main releases/mona-the-octocat	Matches the exact name of a branch or tag name.	main releases/mona-the-octocat
'*'	Matches all branch and tag names that don't contain a slash (/). The * character is a special character in YAML. When you start a pattern with *, you must use quotes.	main releases
'**'	Matches all branch and tag names. This is the default behavior when you don't use a branches or tags filter.	all/the/branches every/tag
'*feature'	The * character is a special character in YAML. When you start a pattern with *, you must use quotes.	mona-feature feature ver-10-feature
v2*	Matches branch and tag names that start with v2.	v2 v2.0 v2.9
v[12].[0-9]+.[0-9]+	Matches all semantic versioning branches and tags with major version 1 or 2.	v1.10.1 v2.0.0

Patterns to match file paths

Path patterns must match the whole path, and start from the repository's root.

Pattern	Description of matches	Example matches
'*'	The * wildcard matches any character, but does not match slash (/). The * character is a special character in YAML. When you start a pattern with *, you must use quotes.	README.md server.rb
'*.jsx?'	The ? character matches zero or one of the preceding character.	page.js page.jsx
'**'	The ** wildcard matches any character including slash (/). This is the default behavior when you don't use a path filter.	all/the/files.md
'*.js'	The * wildcard matches any character, but does not match slash (/). Matches all .js files at the root of the repository.	app.js index.js
'**.js'	Matches all .js files in the repository.	index.js js/index.js src/js/app.js
docs/*	All files within the root of the docs directory only, at the root of the repository.	docs/README.md docs/file.txt
docs/**	Any files in the docs directory and its subdirectories at the root of the repository.	docs/README.md docs/mona/octocat.txt
docs/**/*.md	A file with a .md suffix anywhere in the docs directory.	docs/README.md docs/mona/hello-world.md docs/a/markdown/file.md
'**/docs/**'	Any files in a docs directory anywhere in the repository.	docs/hello.md dir/docs/my-file.txt space/docs/plan/space.doc
'**/README.md'	A README.md file anywhere in the repository.	README.md js/README.md
'**/*src/**'	Any file in a folder with a src suffix anywhere in the repository.	a/src/app.js my-src/code/js/app.js
'**/*-post.md'	A file with the suffix -post.md anywhere in the repository.	my-post.md path/their-post.md
'**/migrate-*.sql'	A file with the prefix migrate- and suffix .sql anywhere in the repository.	migrate-10909.sql db/migrate-v1.0.sql db/sept/migrate-v1.sql
'*.md' '!README.md'	Using an exclamation mark (!) in front of a pattern negates it. When a file matches a pattern and also matches a negative pattern defined later in the file, the file will not be included.	hello.md Does not match README.md docs/hello.md
'*.md' '!README.md' README*	Patterns are checked sequentially. A pattern that negates a previous pattern will re-include file paths.	hello.md README.md README.doc