terraform/builtin/providers/google/image.go

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package google
import (
"fmt"
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"strings"
)
// If the given name is a URL, return it.
// If it is of the form project/name, use that URL.
// If it is of the form name then look in the configured project and then hosted image projects.
func resolveImage(c *Config, name string) (string, error) {
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if strings.HasPrefix(name, "https://www.googleapis.com/compute/v1/") {
return name, nil
} else {
splitName := strings.Split(name, "/")
if len(splitName) == 1 {
// Must infer the project name:
// First, try the configured project.
image, err := c.clientCompute.Images.Get(c.Project, name).Do()
if err == nil {
return image.SelfLink, nil
}
// If we match a lookup for an alternate project, then try that next.
// If not, we return the original error.
// If the image name contains the left hand side, we use the project from the right hand
// side.
imageMap := map[string]string{
"centos": "centos-cloud",
"coreos": "coreos-cloud",
"debian": "debian-cloud",
"opensuse": "opensuse-cloud",
"rhel": "rhel-cloud",
"sles": "suse-cloud",
"ubuntu": "ubuntu-os-cloud",
"windows": "windows-cloud",
}
var project string
for k, v := range imageMap {
if strings.Contains(name, k) {
project = v
break
}
}
if project == "" {
return "", err
}
// There was a match, but the image still may not exist, so check it:
image, err = c.clientCompute.Images.Get(project, name).Do()
if err == nil {
return image.SelfLink, nil
}
return "", err
} else if len(splitName) == 2 {
image, err := c.clientCompute.Images.Get(splitName[0], splitName[1]).Do()
if err == nil {
return image.SelfLink, nil
}
return "", err
} else {
return "", fmt.Errorf("Invalid image name, require URL, project/name, or just name: %s", name)
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}
}
}