"to be defined"
This tool is deliberately simple and trivial, no advanced features.
If you need advanced templates rendering which supports complex syntax and a huge list of datasources (JSON, YAML, AWS EC2 metadata, BoltDB, Hashicorp > Consul and Hashicorp Vault secrets), I recommend you use one of these:
When executed inside a Git repository, tbd automatically exports some variables related to the Git repository which may be useful in the build phase.
These variables are: ARCH, OS, REPO_COMMIT, REPO_HOST, REPO_NAME, REPO_ROOT, REPO_TAG, REPO_TAG_CLEAN, REPO_URL, TIMESTAMP.
Try it! With tbd in your PATH, go in a Git folder and type:
$ tbd vars
+----------------+------------------------------------------+
| ARCH | amd64 |
| OS | linux |
| REPO_COMMIT | a3193274112d3a6f5c2a0277e2ca07ec238d622f |
| REPO_HOST | github.com |
| REPO_NAME | tbd |
| REPO_ROOT | lucasepe |
| REPO_TAG | v0.1.1 |
| REPO_TAG_CLEAN | 0.1.1 |
| REPO_URL | https://github.com/lucasepe/tbd |
| TIMESTAMP | 2021-07-26T14:22:36Z |
+----------------+------------------------------------------+Obviously in your case the values will be different.
A template is a text document in which you can insert placeholders for the text you want to make dynamic.
- a placeholder is delimited by
{{and}}- (i.e.{{ FULL_NAME }}) - all text outside placeholders is copied to the output unchanged
Example:
apiVersion: v1
kind: Pod
metadata:
name: {{ metadata.name }}
labels:
app: {{ metadata.labels.app }}
spec:
containers:
- name: {{ container.1.name }}
image: {{ container.1.image }}
ports:
- containerPort: {{ container.1.port }}
- name: {{ container.2.name }}
image: {{ container.2.image }}
ports:
- containerPort: {{ container.2.port }}Another example:
{{ greeting }}
I will be out of the office from {{ start.date }} until {{ return.date }}.
If you need immediate assistance while I’m away, please email {{ contact.email }}.
Best,
{{ name }}Create a text file in which you enter the values for the placeholders.
- define a placeholder value using
KEY = value(orKEY: value) - empty lines are skipped
- lines beginning with
#are treated as comments
Example:
# metadata values
metadata.name = rss-site
metadata.labels.app = web
# containers values
container.1.name = front-end
container.1.image = nginx
container.1.port = 80
container.2.name = rss-reader
container.2.image: nickchase/rss-php-nginx:v1
container.2.port: 88Another example...
greeting: Greetings
start.date: August, 9
return.date: August 23
contact.email: [email protected]
name: Pinco Pallo Use the
mergecommand
$ tbd merge /path/to/your/template /path/to/your/envfileExample:
$ tbd merge testdata/sample.tbd testdata/sample.vars👉 you can also specify an HTTP url to fetch your template and/or placeholders values.
Example:
$ tbd merge https://raw.githubusercontent.com/lucasepe/tbd/main/testdata/sample.tbd \
https://raw.githubusercontent.com/lucasepe/tbd/main/testdata/sample.varsand the output is...
Greetings
I will be out of the office from August, 9 until August 23.
If you need immediate assistance while I’m away, please email [email protected].
Best,
Pinco PalloUse the
markscommand.
$ tbd marks /path/to/your/templateExample:
$ tbd marks testdata/sample.tbd
greeting
start.date
return.date
contact.email
nameUse the
varscommand.
$ tbd vars /path/to/your/envfileExample:
$ tbd vars testdata/sample.vars
+----------------+------------------------------------------+
| Label | Value |
+----------------+------------------------------------------+
| ARCH | amd64 |
| OS | linux |
| REPO_COMMIT | a3193274112d3a6f5c2a0277e2ca07ec238d622f |
| REPO_HOST | github.com |
| REPO_NAME | tbd |
| REPO_ROOT | lucasepe |
| REPO_TAG | v0.1.1 |
| REPO_TAG_CLEAN | 0.1.1 |
| REPO_URL | https://github.com/lucasepe/tbd |
| TIMESTAMP | 2021-07-26T14:17:49Z |
| contact.email | [email protected] |
| greeting | Greetings |
| name | Pinco Pallo |
| return.date | August 23 |
| start.date | August, 9 |
+----------------+------------------------------------------+As you can see, since I ran the command in a Git repository, there are also relative variables.
If you have golang installed:
$ go install github.com/lucasepe/tbd@latestThis will create the executable under your $GOPATH/bin directory.
If you don't want to compile the sourcecode yourself, here you can find the tool already compiled for:
- MacOS
- Linux
- Windows
Thanks to @valyala for the fasttemplate library - which I have modified by adding and removing some functions for the tbd purpose.