feat : Initial support for converting devcontainer.json to devfile.yaml

[rohanKanojia]

What does this PR do?

This PR provides initial implementation for converting devcontainer.json to devfile.yaml. It adds a new file called dev-containers-to-devfile-adapter.ts that is responsible for converting a devcontainer.json into a devfile.yaml

• Add a new argument devContainerJsonContent to method generateDevfileContext
• If the abovementioned argument is set, devContainerJsonContent is parsed into an object and dev-container-to-devfile-adapter is invoked to perform the conversion.

DevContainers Specification

https://containers.dev/implementors/json_reference/

Devfile Specification

https://devfile.io/docs/2.3.0/devfile-schema

At the moment, these fields are being considered for conversion:

• Name -> metadata.name
• forwardPorts -> components[*].container.endpoints
• containerEnv -> components[*].container.env
• remoteEnv -> components[*].container.env
• overrideCommand -> a command is added to the container while true; do sleep 1000; done
• Mounts -> components[*].volume
• Image -> components[*].container.image
• Build.dockerfile -> components[*].image.dockerfile.uri
• Build.context -> components[*].image.dockerfile.buildContext
• Build.args -> components[*].image.dockerfile.args
• workspaceFolder -> components[*].container.sourceMapping
• initializeCommand -> events.preStart
• onCreateCommand -> events.postStart
• updateContentCommand -> events.postStart
• postCreateCommand -> events.postStart
• postStartCommand -> events.postStart
• postAttachCommand -> events.postStart
• hostRequirements.cpus -> components[*].container.cpuRequest
• hostRequirements.memory -> components[*].container.memoryRequest

I couldn't find mapping for these fields:

• portsAttributes
• otherPortsAttributes
• remoteUser
• containerUser
• updateRemoteUserUID
• userEnvProbe
• shutdownAction
• Init
• Privileged
• capAdd
• securityOpt
• Features
• overrideFeatureInstallOrder
• Customizations
• Build.options
• Build.target
• build.cacheFrom
• appPort (legacy equivalent to forwardPorts)
• workspaceMount
• runArgs
• dockerComposeFile
• Service
• runServices
• waitFor
• hostRequirements.storage
• hostRequirements.gpu

What issues does this PR fix or reference?

Related to https://issues.redhat.com/browse/CRW-7180

Is it tested? How?

• I've tested it mainly via unit tests
• I've also tested it by creating a test project that used development version of this library.

[openshift-ci]

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This pull-request has been approved by: rohanKanojia

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