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diff --git a/doc/ci/variables/README.md b/doc/ci/variables/README.md index 4d6ca8cff6d..c63b1e104ed 100644 --- a/doc/ci/variables/README.md +++ b/doc/ci/variables/README.md @@ -370,8 +370,11 @@ variables take precedence over those defined in `.gitlab-ci.yml`. ## Unsupported variables There are cases where some variables cannot be used in the context of a -`.gitlab-ci.yml` definition (for example under `script`). Read more -about which variables are [not supported](where_variables_can_be_used.md). +`.gitlab-ci.yml` definition (for example under `script`). Read more about which variables are [not supported](where_variables_can_be_used.md). + +## Where variables can be used + +Click [here](where_variables_can_be_used.md) for a section that describes where and how the different types of variables can be used. ## Advanced use @@ -481,81 +484,86 @@ Below you can find supported syntax reference: 1. Equality matching using a string - > Example: `$VARIABLE == "some value"` + Examples: - > Example: `$VARIABLE != "some value"` (introduced in GitLab 11.11) + - `$VARIABLE == "some value"` + - `$VARIABLE != "some value"` (introduced in GitLab 11.11) - You can use equality operator `==` or `!=` to compare a variable content to a - string. We support both, double quotes and single quotes to define a string - value, so both `$VARIABLE == "some value"` and `$VARIABLE == 'some value'` - are supported. `"some value" == $VARIABLE` is correct too. + You can use equality operator `==` or `!=` to compare a variable content to a + string. We support both, double quotes and single quotes to define a string + value, so both `$VARIABLE == "some value"` and `$VARIABLE == 'some value'` + are supported. `"some value" == $VARIABLE` is correct too. 1. Checking for an undefined value - > Example: `$VARIABLE == null` + Examples: - > Example: `$VARIABLE != null` (introduced in GitLab 11.11) + - `$VARIABLE == null` + - `$VARIABLE != null` (introduced in GitLab 11.11) - It sometimes happens that you want to check whether a variable is defined - or not. To do that, you can compare a variable to `null` keyword, like - `$VARIABLE == null`. This expression is going to evaluate to truth if - variable is not defined when `==` is used, or to falsey if `!=` is used. + It sometimes happens that you want to check whether a variable is defined + or not. To do that, you can compare a variable to `null` keyword, like + `$VARIABLE == null`. This expression is going to evaluate to truth if + variable is not defined when `==` is used, or to falsey if `!=` is used. 1. Checking for an empty variable - > Example: `$VARIABLE == ""` + Examples: + + - `$VARIABLE == ""` + - `$VARIABLE != ""` (introduced in GitLab 11.11) - > Example: `$VARIABLE != ""` (introduced in GitLab 11.11) - - If you want to check whether a variable is defined, but is empty, you can - simply compare it against an empty string, like `$VAR == ''` or non-empty - string `$VARIABLE != ""`. + If you want to check whether a variable is defined, but is empty, you can + simply compare it against an empty string, like `$VAR == ''` or non-empty + string `$VARIABLE != ""`. 1. Comparing two variables - > Example: `$VARIABLE_1 == $VARIABLE_2` + Examples: - > Example: `$VARIABLE_1 != $VARIABLE_2` (introduced in GitLab 11.11) + - `$VARIABLE_1 == $VARIABLE_2` + - `$VARIABLE_1 != $VARIABLE_2` (introduced in GitLab 11.11) - It is possible to compare two variables. This is going to compare values - of these variables. + It is possible to compare two variables. This is going to compare values + of these variables. 1. Variable presence check - > Example: `$STAGING` + Example: `$STAGING` - If you only want to create a job when there is some variable present, - which means that it is defined and non-empty, you can simply use - variable name as an expression, like `$STAGING`. If `$STAGING` variable - is defined, and is non empty, expression will evaluate to truth. - `$STAGING` value needs to a string, with length higher than zero. - Variable that contains only whitespace characters is not an empty variable. + If you only want to create a job when there is some variable present, + which means that it is defined and non-empty, you can simply use + variable name as an expression, like `$STAGING`. If `$STAGING` variable + is defined, and is non empty, expression will evaluate to truth. + `$STAGING` value needs to a string, with length higher than zero. + Variable that contains only whitespace characters is not an empty variable. 1. Pattern matching (introduced in GitLab 11.0) - > Example: `$VARIABLE =~ /^content.*/` + Examples: - > Example: `$VARIABLE_1 !~ /^content.*/` (introduced in GitLab 11.11) + - `$VARIABLE =~ /^content.*/` + - `$VARIABLE_1 !~ /^content.*/` (introduced in GitLab 11.11) - It is possible perform pattern matching against a variable and regular - expression. Expression like this evaluates to truth if matches are found - when using `=~`. It evaluates to truth if matches are not found when `!~` is used. + It is possible perform pattern matching against a variable and regular + expression. Expression like this evaluates to truth if matches are found + when using `=~`. It evaluates to truth if matches are not found when `!~` is used. - Pattern matching is case-sensitive by default. Use `i` flag modifier, like - `/pattern/i` to make a pattern case-insensitive. + Pattern matching is case-sensitive by default. Use `i` flag modifier, like + `/pattern/i` to make a pattern case-insensitive. 1. Conjunction / Disjunction ([introduced](https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/27925) in GitLab 12.0) - > Example: `$VARIABLE1 =~ /^content.*/ && $VARIABLE2 == "something"` - - > Example: `$VARIABLE1 =~ /^content.*/ && $VARIABLE2 =~ /thing$/ && $VARIABLE3` + Examples: - > Example: `$VARIABLE1 =~ /^content.*/ || $VARIABLE2 =~ /thing$/ && $VARIABLE3` + - `$VARIABLE1 =~ /^content.*/ && $VARIABLE2 == "something"` + - `$VARIABLE1 =~ /^content.*/ && $VARIABLE2 =~ /thing$/ && $VARIABLE3` + - `$VARIABLE1 =~ /^content.*/ || $VARIABLE2 =~ /thing$/ && $VARIABLE3` - It is possible to join multiple conditions using `&&` or `||`. Any of the otherwise - supported syntax may be used in a conjunctive or disjunctive statement. - Precedence of operators follows standard Ruby 2.5 operation - [precedence](https://ruby-doc.org/core-2.5.0/doc/syntax/precedence_rdoc.html). + It is possible to join multiple conditions using `&&` or `||`. Any of the otherwise + supported syntax may be used in a conjunctive or disjunctive statement. + Precedence of operators follows standard Ruby 2.5 operation + [precedence](https://ruby-doc.org/core-2.5.0/doc/syntax/precedence_rdoc.html). ## Debug tracing |