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75 lines
2.2 KiB
75 lines
2.2 KiB
package config
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import (
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"gerrit.wikimedia.org/r/blubber/build"
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)
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// NodeConfig holds configuration fields related to the Node environment and
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// whether/how to install NPM packages.
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//
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type NodeConfig struct {
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Requirements []string `json:"requirements"` // install requirements from given files
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Env string `json:"env" validate:"omitempty,nodeenv"` // environment name ("production" install)
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}
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// Merge takes another NodeConfig and merges its fields into this one's,
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// overwriting both the environment and requirements files.
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//
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func (nc *NodeConfig) Merge(nc2 NodeConfig) {
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if nc2.Requirements != nil {
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nc.Requirements = nc2.Requirements
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}
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if nc2.Env != "" {
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nc.Env = nc2.Env
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}
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}
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// InstructionsForPhase injects instructions into the build related to Node
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// dependency installation and setting of the NODE_ENV.
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//
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// PhasePreInstall
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//
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// Installs Node package dependencies declared in requirements files into the
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// application directory. Only production related packages are install if
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// NodeConfig.Env is set to "production" in which case `npm dedupe` is also
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// run. Installing dependencies during the build.PhasePreInstall phase allows
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// a compiler implementation (e.g. Docker) to produce cache-efficient output
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// so only changes to package.json will invalidate these steps of the image
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// build.
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//
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// PhasePostInstall
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//
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// Injects build.Env instructions for NODE_ENV, setting the environment
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// according to the configuration.
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//
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func (nc NodeConfig) InstructionsForPhase(phase build.Phase) []build.Instruction {
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switch phase {
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case build.PhasePreInstall:
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if len(nc.Requirements) > 0 {
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npmInstall := build.RunAll{[]build.Run{
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{"npm install", []string{}},
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}}
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if nc.Env == "production" {
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npmInstall.Runs[0].Arguments = []string{"--production"}
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npmInstall.Runs = append(npmInstall.Runs,
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build.Run{"npm dedupe", []string{}},
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)
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}
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return append(
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build.SyncFiles(nc.Requirements, "."),
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npmInstall,
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)
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}
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case build.PhasePostInstall:
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if nc.Env != "" || len(nc.Requirements) > 0 {
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return []build.Instruction{build.Env{map[string]string{
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"NODE_ENV": nc.Env,
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}}}
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}
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}
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return []build.Instruction{}
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}
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