open-nomad/tools/ec2info/output.go

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package main
import (
"io"
"os"
"os/exec"
"text/template"
)
// open the output file for writing.
func open(output string) (io.ReadWriteCloser, error) {
return os.Create(output)
}
// flatten region data, assuming instance type is the same across regions.
func flatten(data map[string]map[string]specs) map[string]specs {
result := make(map[string]specs)
for _, m := range data {
for iType, specs := range m {
result[iType] = specs
}
}
return result
}
type Template struct {
Package string
Data map[string]specs
}
// write the data using the cpu_table.go.template to w.
func write(w io.Writer, data map[string]specs, pkg string) error {
tmpl, err := template.ParseFiles("cpu_table.go.template")
if err != nil {
return err
}
return tmpl.Execute(w, Template{
Package: pkg,
Data: data,
})
}
// format the file using gofmt.
func format(file string) error {
cmd := exec.Command("gofmt", "-w", file)
_, err := cmd.CombinedOutput()
return err
}