70 lines
1.3 KiB
Go
70 lines
1.3 KiB
Go
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package build
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import (
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"fmt"
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"strings"
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"text/template"
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)
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type JobContext struct {
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SourceDir string
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OutputDir string
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Deps map[ID]string
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}
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// Render replaces variable references with their real value.
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func (c *Cmd) Render(ctx JobContext) (*Cmd, error) {
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var errs []error
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var fixedCtx struct {
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SourceDir string
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OutputDir string
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Deps map[string]string
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}
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fixedCtx.SourceDir = ctx.SourceDir
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fixedCtx.OutputDir = ctx.OutputDir
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fixedCtx.Deps = map[string]string{}
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for k, v := range ctx.Deps {
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fixedCtx.Deps[k.String()] = v
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}
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render := func(str string) string {
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t, err := template.New("").Parse(str)
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if err != nil {
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errs = append(errs, err)
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return ""
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}
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var b strings.Builder
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if err := t.Execute(&b, fixedCtx); err != nil {
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errs = append(errs, err)
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return ""
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}
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return b.String()
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}
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renderList := func(l []string) []string {
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var result []string
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for _, in := range l {
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result = append(result, render(in))
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}
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return result
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}
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var rendered Cmd
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rendered.CatOutput = render(c.CatOutput)
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rendered.CatTemplate = render(c.CatTemplate)
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rendered.WorkingDirectory = render(c.WorkingDirectory)
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rendered.Exec = renderList(c.Exec)
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rendered.Environ = renderList(c.Environ)
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if len(errs) != 0 {
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return nil, fmt.Errorf("error rendering cmd: %w", errs[0])
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}
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return &rendered, nil
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}
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