Temple

Sick of sed? Peaked about perl? Use temple to substitute your variables!

Installation

Binaries

I have pre-built binaries for several platform already. They are available on the releases page.

Source

If you have go v1.6 installed, then you can build the binary with the following command:

go install docwhat.org/temple

Usage

Usage: temple <template-file>

A simple templating engine

Arguments:
  <template-file>    The template file to use ($TEMPLE_TEMPLATE_FILE)

Flags:
  -h, --help              Show context-sensitive help.
      --version           Show version information
  -d, --data=DATA-FILE    A YAML or JSON file to use via the {{data.<foo>}} interface ($TEMPLE_DATA_FILE)
  -H, --html              Use HTML templating instead of text templating ($TEMPLE_USE_HTML)

Note that the DATA file must have an object at the top level. You cannot use a bare string or an array.

JSON Example:

{
    "key": "value",
    "key2": 2
}

YAML Example:

key: "value"
key2: 2

Template Syntax

For complete documentation, read go's text/template and html/template.

Sprig Functions

Temple supports the complete list of Sprig functions.

Data Sources

• {{hostname}} -- The systems fully qualified domain name.
• {{uid}} -- UID of the user running temple.
• {{gid}} -- GID of the user running temple.
• {{euid}} -- Effective UID of the user running temple.
• {{egid}} -- Effective GID of the user running temple.
• {{pwd}} -- The current working directory.
• {{json}} -- Access to your JSON data. Use dot notation to get access to items. e.g. {{json.authors.greenwood.first_name}}

Functions

• {{index <expr> 99}} -- The 99th item of the array <expr>.
• {{<expr> | js}} -- <expr> escaped/quoted for JavaScript & JSON.
• {{<expr> | html}} -- <expr> escaped/quoted for HTML.
• {{<expr> | urlquery}} -- <expr> escaped/quoted for a URL quoting. i.e. replacing spaces with + and using %NN syntax.
• {{<expr> | shellquote}} -- <expr> escaped/quoted for POSIX shells.
• {{<expr> | len}} -- The length of the <expr>.

Flow Control

• {{if <expr>}}true string{{else}}false string{{end}} -- If/Else syntax. The {{else}} is optional.
• {{range <array>}} item: {{.}} {{else}} The list is empty {{end}} -- Iterate over <array>. The {{else}} is optional.

Miscellaneous

• {{<expr> -}} -- Trim whitespace to the right. e.g. {{1 -}} .0 becomes 1.0.
• {{- <expr>}} -- Trim whitespace to the left.
• {{- <expr> -}} -- Trim whitespace to the right and left.
• {{/* comment */}} -- Comments!

Related Projects

• gomplate

Thanks

• @alecthomas for kingpin
• @kballard for go-shellquote
• @seh for Go help