mirror of
https://github.com/letic/terraform-provider-google.git
synced 2024-07-01 07:42:40 +00:00
195 lines
8.8 KiB
Go
195 lines
8.8 KiB
Go
package google
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import (
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"fmt"
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"regexp"
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"strings"
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"google.golang.org/api/googleapi"
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)
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const (
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resolveImageProjectRegex = "[-_a-zA-Z0-9]*"
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resolveImageFamilyRegex = "[-_a-zA-Z0-9]*"
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resolveImageImageRegex = "[-_a-zA-Z0-9]*"
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)
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var (
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resolveImageProjectImage = regexp.MustCompile(fmt.Sprintf("^projects/(%s)/global/images/(%s)$", resolveImageProjectRegex, resolveImageImageRegex))
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resolveImageProjectFamily = regexp.MustCompile(fmt.Sprintf("^projects/(%s)/global/images/family/(%s)$", resolveImageProjectRegex, resolveImageFamilyRegex))
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resolveImageGlobalImage = regexp.MustCompile(fmt.Sprintf("^global/images/(%s)$", resolveImageImageRegex))
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resolveImageGlobalFamily = regexp.MustCompile(fmt.Sprintf("^global/images/family/(%s)$", resolveImageFamilyRegex))
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resolveImageFamilyFamily = regexp.MustCompile(fmt.Sprintf("^family/(%s)$", resolveImageFamilyRegex))
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resolveImageProjectImageShorthand = regexp.MustCompile(fmt.Sprintf("^(%s)/(%s)$", resolveImageProjectRegex, resolveImageImageRegex))
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resolveImageProjectFamilyShorthand = regexp.MustCompile(fmt.Sprintf("^(%s)/(%s)$", resolveImageProjectRegex, resolveImageFamilyRegex))
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resolveImageFamily = regexp.MustCompile(fmt.Sprintf("^(%s)$", resolveImageFamilyRegex))
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resolveImageImage = regexp.MustCompile(fmt.Sprintf("^(%s)$", resolveImageImageRegex))
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resolveImageLink = regexp.MustCompile(fmt.Sprintf("^https://www.googleapis.com/compute/v1/projects/(%s)/global/images/(%s)", resolveImageProjectRegex, resolveImageImageRegex))
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)
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func resolveImageImageExists(c *Config, project, name string) (bool, error) {
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if _, err := c.clientCompute.Images.Get(project, name).Do(); err == nil {
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return true, nil
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} else if gerr, ok := err.(*googleapi.Error); ok && gerr.Code == 404 {
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return false, nil
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} else {
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return false, fmt.Errorf("Error checking if image %s exists: %s", name, err)
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}
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}
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func resolveImageFamilyExists(c *Config, project, name string) (bool, error) {
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if _, err := c.clientCompute.Images.GetFromFamily(project, name).Do(); err == nil {
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return true, nil
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} else if gerr, ok := err.(*googleapi.Error); ok && gerr.Code == 404 {
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return false, nil
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} else {
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return false, fmt.Errorf("Error checking if family %s exists: %s", name, err)
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}
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}
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func sanityTestRegexMatches(expected int, got []string, regexType, name string) error {
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if len(got)-1 != expected { // subtract one, index zero is the entire matched expression
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return fmt.Errorf("Expected %d %s regex matches, got %d for %s", expected, regexType, len(got)-1, name)
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}
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return nil
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}
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// If the given name is a URL, return it.
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// If it's in the form projects/{project}/global/images/{image}, return it
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// If it's in the form projects/{project}/global/images/family/{family}, return it
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// If it's in the form global/images/{image}, return it
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// If it's in the form global/images/family/{family}, return it
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// If it's in the form family/{family}, check if it's a family in the current project. If it is, return it as global/images/family/{family}.
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// If not, check if it could be a GCP-provided family, and if it exists. If it does, return it as projects/{project}/global/images/family/{family}.
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// If it's in the form {project}/{family-or-image}, check if it's an image in the named project. If it is, return it as projects/{project}/global/images/{image}.
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// If not, check if it's a family in the named project. If it is, return it as projects/{project}/global/images/family/{family}.
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// If it's in the form {family-or-image}, check if it's an image in the current project. If it is, return it as global/images/{image}.
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// If not, check if it could be a GCP-provided image, and if it exists. If it does, return it as projects/{project}/global/images/{image}.
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// If not, check if it's a family in the current project. If it is, return it as global/images/family/{family}.
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// If not, check if it could be a GCP-provided family, and if it exists. If it does, return it as projects/{project}/global/images/family/{family}
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func resolveImage(c *Config, name string) (string, error) {
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// built-in projects to look for images/families containing the string
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// on the left in
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imageMap := map[string]string{
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"centos": "centos-cloud",
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"coreos": "coreos-cloud",
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"debian": "debian-cloud",
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"opensuse": "opensuse-cloud",
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"rhel": "rhel-cloud",
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"sles": "suse-cloud",
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"ubuntu": "ubuntu-os-cloud",
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"windows": "windows-cloud",
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}
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var builtInProject string
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for k, v := range imageMap {
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if strings.Contains(name, k) {
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builtInProject = v
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break
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}
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}
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switch {
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case resolveImageLink.MatchString(name): // https://www.googleapis.com/compute/v1/projects/xyz/global/images/xyz
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return name, nil
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case resolveImageProjectImage.MatchString(name): // projects/xyz/global/images/xyz
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res := resolveImageProjectImage.FindStringSubmatch(name)
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if err := sanityTestRegexMatches(2, res, "project image", name); err != nil {
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return "", err
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}
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return fmt.Sprintf("projects/%s/global/images/%s", res[1], res[2]), nil
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case resolveImageProjectFamily.MatchString(name): // projects/xyz/global/images/family/xyz
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res := resolveImageProjectFamily.FindStringSubmatch(name)
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if err := sanityTestRegexMatches(2, res, "project family", name); err != nil {
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return "", err
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}
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return fmt.Sprintf("projects/%s/global/images/family/%s", res[1], res[2]), nil
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case resolveImageGlobalImage.MatchString(name): // global/images/xyz
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res := resolveImageGlobalImage.FindStringSubmatch(name)
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if err := sanityTestRegexMatches(1, res, "global image", name); err != nil {
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return "", err
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}
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return fmt.Sprintf("global/images/%s", res[1]), nil
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case resolveImageGlobalFamily.MatchString(name): // global/images/family/xyz
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res := resolveImageGlobalFamily.FindStringSubmatch(name)
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if err := sanityTestRegexMatches(1, res, "global family", name); err != nil {
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return "", err
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}
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return fmt.Sprintf("global/images/family/%s", res[1]), nil
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case resolveImageFamilyFamily.MatchString(name): // family/xyz
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res := resolveImageFamilyFamily.FindStringSubmatch(name)
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if err := sanityTestRegexMatches(1, res, "family family", name); err != nil {
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return "", err
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}
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if ok, err := resolveImageFamilyExists(c, c.Project, res[1]); err != nil {
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return "", err
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} else if ok {
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return fmt.Sprintf("global/images/family/%s", res[1]), nil
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}
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if builtInProject != "" {
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if ok, err := resolveImageFamilyExists(c, builtInProject, res[1]); err != nil {
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return "", err
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} else if ok {
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return fmt.Sprintf("projects/%s/global/images/family/%s", builtInProject, res[1]), nil
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}
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}
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case resolveImageProjectImageShorthand.MatchString(name): // xyz/xyz
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res := resolveImageProjectImageShorthand.FindStringSubmatch(name)
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if err := sanityTestRegexMatches(2, res, "project image shorthand", name); err != nil {
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return "", err
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}
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if ok, err := resolveImageImageExists(c, res[1], res[2]); err != nil {
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return "", err
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} else if ok {
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return fmt.Sprintf("projects/%s/global/images/%s", res[1], res[2]), nil
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}
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fallthrough // check if it's a family
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case resolveImageProjectFamilyShorthand.MatchString(name): // xyz/xyz
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res := resolveImageProjectFamilyShorthand.FindStringSubmatch(name)
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if err := sanityTestRegexMatches(2, res, "project family shorthand", name); err != nil {
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return "", err
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}
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if ok, err := resolveImageFamilyExists(c, res[1], res[2]); err != nil {
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return "", err
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} else if ok {
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return fmt.Sprintf("projects/%s/global/images/family/%s", res[1], res[2]), nil
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}
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case resolveImageImage.MatchString(name): // xyz
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res := resolveImageImage.FindStringSubmatch(name)
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if err := sanityTestRegexMatches(1, res, "image", name); err != nil {
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return "", err
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}
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if ok, err := resolveImageImageExists(c, c.Project, res[1]); err != nil {
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return "", err
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} else if ok {
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return fmt.Sprintf("global/images/%s", res[1]), nil
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}
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if builtInProject != "" {
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// check the images GCP provides
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if ok, err := resolveImageImageExists(c, builtInProject, res[1]); err != nil {
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return "", err
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} else if ok {
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return fmt.Sprintf("projects/%s/global/images/%s", builtInProject, res[1]), nil
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}
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}
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fallthrough // check if the name is a family, instead of an image
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case resolveImageFamily.MatchString(name): // xyz
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res := resolveImageFamily.FindStringSubmatch(name)
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if err := sanityTestRegexMatches(1, res, "family", name); err != nil {
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return "", err
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}
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if ok, err := resolveImageFamilyExists(c, c.Project, res[1]); err != nil {
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return "", err
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} else if ok {
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return fmt.Sprintf("global/images/family/%s", res[1]), nil
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}
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if builtInProject != "" {
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// check the families GCP provides
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if ok, err := resolveImageFamilyExists(c, builtInProject, res[1]); err != nil {
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return "", err
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} else if ok {
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return fmt.Sprintf("projects/%s/global/images/family/%s", builtInProject, res[1]), nil
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}
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}
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}
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return "", fmt.Errorf("Could not find image or family %s", name)
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}
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