forked from toolshed/abra
98 lines
2.9 KiB
Go
98 lines
2.9 KiB
Go
package opts
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import (
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"errors"
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"os"
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"strconv"
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"strings"
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"github.com/docker/cli/pkg/kvfile"
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"github.com/docker/docker/api/types/container"
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)
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// ReadKVStrings reads a file of line terminated key=value pairs, and overrides any keys
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// present in the file with additional pairs specified in the override parameter
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func ReadKVStrings(files []string, override []string) ([]string, error) {
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return readKVStrings(files, override, nil)
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}
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// ReadKVEnvStrings reads a file of line terminated key=value pairs, and overrides any keys
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// present in the file with additional pairs specified in the override parameter.
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// If a key has no value, it will get the value from the environment.
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func ReadKVEnvStrings(files []string, override []string) ([]string, error) {
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return readKVStrings(files, override, os.LookupEnv)
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}
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func readKVStrings(files []string, override []string, emptyFn func(string) (string, bool)) ([]string, error) {
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var variables []string
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for _, ef := range files {
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parsedVars, err := kvfile.Parse(ef, emptyFn)
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if err != nil {
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return nil, err
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}
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variables = append(variables, parsedVars...)
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}
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// parse the '-e' and '--env' after, to allow override
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variables = append(variables, override...)
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return variables, nil
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}
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// ConvertKVStringsToMap converts ["key=value"] to {"key":"value"}
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func ConvertKVStringsToMap(values []string) map[string]string {
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result := make(map[string]string, len(values))
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for _, value := range values {
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k, v, _ := strings.Cut(value, "=")
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result[k] = v
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}
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return result
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}
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// ConvertKVStringsToMapWithNil converts ["key=value"] to {"key":"value"}
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// but set unset keys to nil - meaning the ones with no "=" in them.
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// We use this in cases where we need to distinguish between
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//
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// FOO= and FOO
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//
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// where the latter case just means FOO was mentioned but not given a value
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func ConvertKVStringsToMapWithNil(values []string) map[string]*string {
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result := make(map[string]*string, len(values))
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for _, value := range values {
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k, v, ok := strings.Cut(value, "=")
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if !ok {
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result[k] = nil
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} else {
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result[k] = &v
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}
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}
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return result
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}
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// ParseRestartPolicy returns the parsed policy or an error indicating what is incorrect
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func ParseRestartPolicy(policy string) (container.RestartPolicy, error) {
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if policy == "" {
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// for backward-compatibility, we don't set the default ("no")
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// policy here, because older versions of the engine may not
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// support it.
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return container.RestartPolicy{}, nil
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}
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p := container.RestartPolicy{}
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k, v, ok := strings.Cut(policy, ":")
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if ok && k == "" {
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return container.RestartPolicy{}, errors.New("invalid restart policy format: no policy provided before colon")
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}
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if v != "" {
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count, err := strconv.Atoi(v)
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if err != nil {
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return container.RestartPolicy{}, errors.New("invalid restart policy format: maximum retry count must be an integer")
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}
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p.MaximumRetryCount = count
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}
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p.Name = container.RestartPolicyMode(k)
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return p, nil
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}
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