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|
package config
import (
"gerrit.wikimedia.org/r/blubber/build"
)
// VariantConfig holds configuration fields for each defined build variant.
//
type VariantConfig struct {
Includes []string `yaml:"includes" validate:"dive,variantref"` // other variants
Copies string `yaml:"copies" validate:"omitempty,variantref"` // copy artifacts from variant
Artifacts []ArtifactsConfig `yaml:"artifacts" validate:"dive"` // artifact configuration
CommonConfig `yaml:",inline"`
}
// Merge takes another VariantConfig and overwrites this struct's fields.
// Artifacts are merged additively.
//
func (vc *VariantConfig) Merge(vc2 VariantConfig) {
vc.Copies = vc2.Copies
vc.Artifacts = append(vc.Artifacts, vc2.Artifacts...)
vc.CommonConfig.Merge(vc2.CommonConfig)
}
// InstructionsForPhase injects build instructions related to artifact
// copying, volume definition or copying of application files, and all common
// configuration.
//
// PhaseInstall
//
// If VariantConfig.Copies is not set, either copy in application files or
// define a shared volume. Otherwise, delegate to
// ArtifactsConfig.InstructionsForPhase.
//
func (vc *VariantConfig) InstructionsForPhase(phase build.Phase) []build.Instruction {
instructions := vc.CommonConfig.InstructionsForPhase(phase)
var switchUser string
var uid, gid uint
switch phase {
case build.PhasePrivileged:
switchUser = "root"
case build.PhasePrivilegeDropped:
switchUser = vc.Lives.As
uid, gid = vc.Lives.UID, vc.Lives.GID
case build.PhasePreInstall:
uid, gid = vc.Lives.UID, vc.Lives.GID
case build.PhaseInstall:
uid, gid = vc.Lives.UID, vc.Lives.GID
if vc.Copies == "" {
if vc.SharedVolume.True {
instructions = append(instructions, build.Volume{vc.Lives.In})
} else {
instructions = append(instructions, build.Copy{[]string{"."}, "."})
}
}
case build.PhasePostInstall:
if vc.Runs.Insecurely.True {
uid, gid = vc.Lives.UID, vc.Lives.GID
} else {
switchUser = vc.Runs.As
uid, gid = vc.Runs.UID, vc.Runs.GID
}
if len(vc.EntryPoint) > 0 {
instructions = append(instructions, build.EntryPoint{vc.EntryPoint})
}
}
for _, artifact := range vc.allArtifacts() {
instructions = append(instructions, artifact.InstructionsForPhase(phase)...)
}
if switchUser != "" {
instructions = append(
[]build.Instruction{
build.User{switchUser},
build.Home(switchUser),
},
instructions...,
)
}
if uid != 0 {
instructions = build.ApplyUser(uid, gid, instructions)
}
return instructions
}
// VariantDependencies returns all unique names of other variants that are
// referenced in the VariantConfig.Artifacts configuration.
//
func (vc *VariantConfig) VariantDependencies() []string {
// get unique set of variant dependencies based on artifacts
existing := map[string]bool{}
dependencies := []string{}
for _, artifact := range vc.allArtifacts() {
if dependency := artifact.From; dependency != "" && !existing[dependency] {
existing[dependency] = true
dependencies = append(dependencies, dependency)
}
}
return dependencies
}
func (vc *VariantConfig) allArtifacts() []ArtifactsConfig {
return append(vc.defaultArtifacts(), vc.Artifacts...)
}
func (vc *VariantConfig) defaultArtifacts() []ArtifactsConfig {
if vc.Copies != "" {
return []ArtifactsConfig{
{
From: vc.Copies,
Source: vc.Lives.In,
Destination: vc.Lives.In,
},
{
From: vc.Copies,
Source: LocalLibPrefix,
Destination: LocalLibPrefix,
},
}
}
return []ArtifactsConfig{}
}
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