1. New build system

Reviewed-on: #1

dsl/build.go

@@ -0,0 +1,158 @@
+package dsl
+
+type BuildProfile int
+
+const (
+	ProfileUnset BuildProfile = iota
+	ProfileRelease
+	ProfileDebug
+	ProfileSanitized
+)
+
+func (p BuildProfile) String() string {
+	switch p {
+	case ProfileRelease:
+		return "release"
+	case ProfileDebug:
+		return "debug"
+	case ProfileSanitized:
+		return "sanitized"
+	default:
+		return "unset"
+	}
+}
+
+type WarningLevel int
+
+const (
+	WarningsUnset WarningLevel = iota
+	WarningsDefault
+	WarningsStrict
+	WarningsPedantic
+)
+
+func (w WarningLevel) String() string {
+	switch w {
+	case WarningsDefault:
+		return "default"
+	case WarningsStrict:
+		return "strict"
+	case WarningsPedantic:
+		return "pedantic"
+	default:
+		return "unset"
+	}
+}
+
+type BuildConfig struct {
+	Name string
+
+	Language string
+	Standard string
+	Sources  []string
+	Includes []string
+	Output   string
+
+	Profile  BuildProfile
+	Warnings WarningLevel
+	Sanitize []string
+	Wrapper  string
+
+	Defines map[string]string
+	Link    []string
+	Extra   []string
+
+	Platforms []string
+	Compilers []string
+
+	Linux   *BuildConfig
+	Windows *BuildConfig
+	Darwin  *BuildConfig
+}
+
+func (dst *BuildConfig) MergeFrom(src *BuildConfig) {
+	if src == nil {
+		return
+	}
+	if src.Language != "" {
+		dst.Language = src.Language
+	}
+	if src.Standard != "" {
+		dst.Standard = src.Standard
+	}
+	if src.Output != "" {
+		dst.Output = src.Output
+	}
+	if src.Profile != ProfileUnset {
+		dst.Profile = src.Profile
+	}
+	if src.Warnings != WarningsUnset {
+		dst.Warnings = src.Warnings
+	}
+	if src.Wrapper != "" {
+		dst.Wrapper = src.Wrapper
+	}
+
+	dst.Sources = append(dst.Sources, src.Sources...)
+	dst.Includes = append(dst.Includes, src.Includes...)
+	dst.Sanitize = append(dst.Sanitize, src.Sanitize...)
+	dst.Link = append(dst.Link, src.Link...)
+	dst.Extra = append(dst.Extra, src.Extra...)
+	dst.Platforms = append(dst.Platforms, src.Platforms...)
+	dst.Compilers = append(dst.Compilers, src.Compilers...)
+
+	if len(src.Defines) > 0 {
+		if dst.Defines == nil {
+			dst.Defines = map[string]string{}
+		}
+		for k, v := range src.Defines {
+			dst.Defines[k] = v
+		}
+	}
+}
+
+func (b *BuildConfig) Resolve(defaults *BuildConfig, os string) BuildConfig {
+	var out BuildConfig
+	out.MergeFrom(defaults)
+	out.MergeFrom(b)
+	out.Name = b.Name
+
+	var osOverride *BuildConfig
+	switch os {
+	case "linux":
+		osOverride = b.Linux
+	case "windows":
+		osOverride = b.Windows
+	case "darwin":
+		osOverride = b.Darwin
+	}
+	out.MergeFrom(osOverride)
+
+	return out
+}
+
+func (b *BuildConfig) AppliesTo(os, compiler string) bool {
+	if len(b.Platforms) > 0 && !contains(b.Platforms, os) {
+		return false
+	}
+	if len(b.Compilers) > 0 && !contains(b.Compilers, compiler) {
+		return false
+	}
+	return true
+}
+
+func contains(xs []string, x string) bool {
+	for _, v := range xs {
+		if v == x {
+			return true
+		}
+	}
+	return false
+}
+
+type ToolchainSpec struct {
+	Name      string
+	Platforms []string
+	Binary    string
+	Class     string
+}