renderizer

Render Go text templates from the command line.

go get github.com/metawave/renderizer/v2/cmd/renderizer

Supports providing top-level name/value pairs on the command line:

echo 'Hello, {{.User}}' | renderizer --user=${USER}

And read from the environment:

echo 'Hello, {{.env.USER}}' | renderizer

Usage:

renderizer [OPTIONS] [--name=value]... [template-file]...

Examples

Render the pod.yaml.tmpl using values from examples/pod/.renderizer.yaml:

renderizer --settings=examples/pod/.pod.yaml examples/pod/pod.yaml.tmpl

Or set RENDERIZER in the environment:

RENDERIZER=examples/.pod.yaml renderizer examples/pod/pod.yaml.tmpl

Alternatively, it'll try .pod.yaml in the current directory.

(cd examples/pod; renderizer)

Next, override the deployment value to render the "dev" pod.yaml.tmpl (after cd examples/pod):

renderizer --deployment=dev --name='spaced out'

For more examples, see the examples folder.

Configuration

Settings

Settings can be loaded from any YAMLs:

renderizer --settings=.settings1.yaml --settings=.settings2.yaml --name=value template-file

Capitalization -C

This is a positional toggle flag.

Variable names are converted to title case by default. It can be disabled for any subsequent variables:

renderizer --name=value -C --top=first template-file

Sets:

Name: value
top: first

Missing Keys

Control the missingkeys template-engine option:

renderizer --missing=zero --top=first template-file

Environment

Provide a name for the environment variables:

renderizer --environment=env template-file

It defaults to env which is effectively the same as the above --environment=env.

Template Functions

For the full list, see functions.txt.tmpl

• add - func(a, b int) int
• cleanse - func(s string) string - remove [^[:alpha:]]
• commandLine - func() string the command line
• environment - map[string]string - the runtime environment
• inc - func(a int) int
• join - func(a []interface, sep string) string
• lower - strings.ToLower
• now - time.Now
• replace - strings.Replace
• trim - strings.Trim
• trimLeft - strings.TrimLeft
• trimRight - strings.TrimRight
• upper - strings.ToUpper