Wiki: easygen cli code-gen example by code

[suntong]

The easygen provides a rich set of options to auto-generating Go code for command line parameter handling. Here are them in real code.

For built-in flag package

Sample Go flag package based code

Sample Go code:

https://github.com/go-easygen/easygen/blob/cdf80e923cb3ba9dca32b689e2e99de66085d255/test/commandlineFlag.ref#L5-L112

Which is generated from this YAML file:

https://github.com/go-easygen/easygen/blob/cdf80e923cb3ba9dca32b689e2e99de66085d255/test/commandlineFlag.yaml#L1-L76

For easygen itself using the built-in flag package

https://github.com/go-easygen/easygen/blob/cdf80e923cb3ba9dca32b689e2e99de66085d255/cmd/easygen/flags.go#L1-L86

Which is generated from this YAML file:

https://github.com/go-easygen/easygen/blob/cdf80e923cb3ba9dca32b689e2e99de66085d255/cmd/easygen/easygen.yaml#L1-L76

For ffcvt using the built-in flag package

This is by far the longest command line parameter handling code I've ever built --
https://github.com/suntong/ffcvt/blob/master/config.go
and it is built by easygen automatically as well.

For the viper package

Sample Go code:

https://github.com/go-easygen/easygen/blob/cdf80e923cb3ba9dca32b689e2e99de66085d255/test/commandlineCV.ref#L2-L18

Which is generated from this YAML file:

https://github.com/go-easygen/easygen/blob/cdf80e923cb3ba9dca32b689e2e99de66085d255/test/commandlineCV.yaml#L1-L30

For the cli package

Sample cli package based code 1

Sample Go code:

https://github.com/go-easygen/easygen/blob/cdf80e923cb3ba9dca32b689e2e99de66085d255/test/commandlineCLI-024.ref#L1-L144

Which is generated from this YAML file:

https://github.com/go-easygen/easygen/blob/cdf80e923cb3ba9dca32b689e2e99de66085d255/test/commandlineCLI-024.yaml#L1-L108

Sample cli package based code 2

Sample Go code 2:

https://github.com/go-easygen/easygen/blob/cdf80e923cb3ba9dca32b689e2e99de66085d255/test/commandlineCLI-027.ref#L1-L138

This is my current way of generating cli package based command line parameter handling code.

It is generated from this YAML file:

https://github.com/go-easygen/easygen/blob/cdf80e923cb3ba9dca32b689e2e99de66085d255/test/commandlineCLI-027.yaml#L1-L116