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Made some changes to the Packer templating docs 

1. Added the `user` function.
2. Some tidying up of language.
This commit is contained in:
James Turnbull 2017-05-15 14:31:58 -04:00
parent 45a48132d0
commit f73617b6b7
1 changed files with 9 additions and 9 deletions
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18
website/source/docs/templates/engine.html.md vendored
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@ -18,13 +18,12 @@ For example, the `{{timestamp}}` function can be used in any string to generate
the current timestamp. This is useful for configurations that require unique
keys, such as AMI names. By setting the AMI name to something like
`My Packer AMI {{timestamp}}`, the AMI name will be unique down to the second.
If you need greater than one second granularity, you should use `{{uuid}}`, as
when you have multiple builders in the same template.
If you need greater than one second granularity, you should use `{{uuid}}`, for example when you have multiple builders in the same template.
In addition to globally available functions like timestamp shown before, some
configurations have special local variables that are available only for that
configuration. These are recognizable because they're prefixed by a period, such
as `{{.Name}}`.
In addition to globally available functions like `{{timestamp}}`, some
configurations have special local variables that are available only for
that configuration. These are recognizable because they're prefixed by a
period, such as `{{.Name}}`.
The complete syntax is covered in the next section, followed by a reference of
globally available functions.
@ -33,9 +32,9 @@ globally available functions.
The syntax of templates uses the following conventions:
* Anything template related happens within double-braces: `{{ }}`
* Variables are prefixed with a period and capitalized, such as `{{.Variable}}`
* Functions are directly within the braces, such as `{{timestamp}}`
* Anything template related happens within double-braces: `{{ }}`.
* Variables are prefixed with a period and capitalized, such as `{{.Variable}}`.
* Functions are directly within the braces, such as `{{timestamp}}`.
Here is an example from the VMware VMX template that shows configuration
templates in action:
@ -72,6 +71,7 @@ in Packer templates. These are listed below for reference.
- `timestamp` - The current Unix timestamp in UTC.
- `uuid` - Returns a random UUID.
- `upper` - Uppercases the string.
- `user` - Specify a user variable.
### isotime Format