- the function already trimmed leading whitespace from each line before
parsing. keys with trailing whitespace would be invalidated, and values
have whitespace preserved, so there's no need to trim whitespace for the
key.
- if a line is validated (key is valid), we don't need to reconstruct the
key=value by concatenating, and we can add the line as-is.
- check if the key is empty before checking if it contains whitespace
- touch-up comments
- rename some variables for readability
- slight cleanup to use early returns / early continues to reduce nesting
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This error was originally introduced `ErrBadEnvVariable` in [moby/moby@500c8ba],
but merely for convenience, and not used as a sentinel error. After the code
was moved from the daemon to the cli repository, it was renamed to be more
generic `ErrBadKey` in commit 2b17f4c8a8.
A search on GitHub shows that there's no consumers using this error as
sentinel error, and it's not used in our own code as such, so it should
be safe to remove this error.
This patch removes the `ErrBadKey` error-type; it also removes the prefix
(`poorly formatted environment:`) to make the error more generic, because
the same function was used both for env-files and label-files.
[moby/moby@500c8ba]: 500c8ba4b6
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
cli/registry/client/endpoint.go:128:34: fmt.Sprintf can be replaced with string concatenation (perfsprint)
req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", th.token))
^
cli/command/telemetry_docker.go:88:14: fmt.Sprintf can be replaced with string concatenation (perfsprint)
endpoint = fmt.Sprintf("unix://%s", path.Join(u.Host, u.Path))
^
cli/command/cli_test.go:195:47: fmt.Sprintf can be replaced with string concatenation (perfsprint)
opts := &flags.ClientOptions{Hosts: []string{fmt.Sprintf("unix://%s", socket)}}
^
cli/command/registry_test.go:59:24: fmt.Sprintf can be replaced with string concatenation (perfsprint)
inputServerAddress: fmt.Sprintf("https://%s", testAuthConfigs[1].ServerAddress),
^
cli/command/container/opts_test.go:338:35: fmt.Sprintf can be replaced with string concatenation (perfsprint)
if config, _, _ := mustParse(t, fmt.Sprintf("--hostname=%s", hostname)); config.Hostname != expectedHostname {
^
cli/command/context/options.go:79:24: fmt.Sprintf can be replaced with string concatenation (perfsprint)
errs = append(errs, fmt.Sprintf("%s: unrecognized config key", k))
^
cli/command/image/build.go:461:68: fmt.Sprintf can be replaced with string concatenation (perfsprint)
line = dockerfileFromLinePattern.ReplaceAllLiteralString(line, fmt.Sprintf("FROM %s", reference.FamiliarString(trustedRef)))
^
cli/command/image/remove_test.go:21:9: fmt.Sprintf can be replaced with string concatenation (perfsprint)
return fmt.Sprintf("Error: No such image: %s", n.imageID)
^
cli/command/image/build/context.go:229:102: fmt.Sprintf can be replaced with string concatenation (perfsprint)
progReader := progress.NewProgressReader(response.Body, progressOutput, response.ContentLength, "", fmt.Sprintf("Downloading build context from remote url: %s", remoteURL))
^
cli/command/service/logs.go:215:16: fmt.Sprintf can be replaced with string concatenation (perfsprint)
taskName += fmt.Sprintf(".%s", task.ID)
^
cli/command/service/logs.go:217:16: fmt.Sprintf can be replaced with string concatenation (perfsprint)
taskName += fmt.Sprintf(".%s", stringid.TruncateID(task.ID))
^
cli/command/service/progress/progress_test.go:877:18: fmt.Sprintf can be replaced with string concatenation (perfsprint)
ID: fmt.Sprintf("task%s", nodeID),
^
cli/command/stack/swarm/remove.go:61:24: fmt.Sprintf can be replaced with string concatenation (perfsprint)
errs = append(errs, fmt.Sprintf("Failed to remove some resources from stack: %s", namespace))
^
cli/command/swarm/ipnet_slice_test.go:32:9: fmt.Sprintf can be replaced with string concatenation (perfsprint)
arg := fmt.Sprintf("--cidrs=%s", strings.Join(vals, ","))
^
cli/command/swarm/ipnet_slice_test.go:137:30: fmt.Sprintf can be replaced with string concatenation (perfsprint)
if err := f.Parse([]string{fmt.Sprintf("--cidrs=%s", strings.Join(test.FlagArg, ","))}); err != nil {
^
cli/compose/schema/schema.go:105:11: fmt.Sprintf can be replaced with string concatenation (perfsprint)
return fmt.Sprintf("must be a %s", humanReadableType(expectedType))
^
cli/manifest/store/store.go:165:9: fmt.Sprintf can be replaced with string concatenation (perfsprint)
return fmt.Sprintf("No such manifest: %s", n.object)
^
e2e/image/push_test.go:340:4: fmt.Sprintf can be replaced with string concatenation (perfsprint)
fmt.Sprintf("NOTARY_ROOT_PASSPHRASE=%s", pwd),
^
e2e/image/push_test.go:341:4: fmt.Sprintf can be replaced with string concatenation (perfsprint)
fmt.Sprintf("NOTARY_TARGETS_PASSPHRASE=%s", pwd),
^
e2e/image/push_test.go:342:4: fmt.Sprintf can be replaced with string concatenation (perfsprint)
fmt.Sprintf("NOTARY_SNAPSHOT_PASSPHRASE=%s", pwd),
^
e2e/image/push_test.go:343:4: fmt.Sprintf can be replaced with string concatenation (perfsprint)
fmt.Sprintf("NOTARY_DELEGATION_PASSPHRASE=%s", pwd),
^
e2e/plugin/trust_test.go:23:16: fmt.Sprintf can be replaced with string concatenation (perfsprint)
pluginName := fmt.Sprintf("%s/plugin-content-trust", registryPrefix)
^
e2e/plugin/trust_test.go:53:8: fmt.Sprintf can be replaced with string concatenation (perfsprint)
Out: fmt.Sprintf("Installed plugin %s", pluginName),
^
e2e/trust/revoke_test.go:62:57: fmt.Sprintf can be replaced with string concatenation (perfsprint)
icmd.RunCommand("docker", "tag", fixtures.AlpineImage, fmt.Sprintf("%s:v1", revokeRepo)).Assert(t, icmd.Success)
^
e2e/trust/revoke_test.go:64:49: fmt.Sprintf can be replaced with string concatenation (perfsprint)
icmd.Command("docker", "-D", "trust", "sign", fmt.Sprintf("%s:v1", revokeRepo)),
^
e2e/trust/revoke_test.go:68:58: fmt.Sprintf can be replaced with string concatenation (perfsprint)
icmd.RunCommand("docker", "tag", fixtures.BusyboxImage, fmt.Sprintf("%s:v2", revokeRepo)).Assert(t, icmd.Success)
^
e2e/trust/revoke_test.go:70:49: fmt.Sprintf can be replaced with string concatenation (perfsprint)
icmd.Command("docker", "-D", "trust", "sign", fmt.Sprintf("%s:v2", revokeRepo)),
^
e2e/trust/sign_test.go:36:47: fmt.Sprintf can be replaced with string concatenation (perfsprint)
assert.Check(t, is.Contains(result.Stdout(), fmt.Sprintf("v1: digest: sha256:%s", fixtures.AlpineSha)))
^
e2e/trust/sign_test.go:53:47: fmt.Sprintf can be replaced with string concatenation (perfsprint)
assert.Check(t, is.Contains(result.Stdout(), fmt.Sprintf("v1: digest: sha256:%s", fixtures.BusyboxSha)))
^
e2e/trust/sign_test.go:65:47: fmt.Sprintf can be replaced with string concatenation (perfsprint)
assert.Check(t, is.Contains(result.Stdout(), fmt.Sprintf("v1: digest: sha256:%s", fixtures.AlpineSha)))
^
opts/file.go:21:9: fmt.Sprintf can be replaced with string concatenation (perfsprint)
return fmt.Sprintf("poorly formatted environment: %s", e.msg)
^
opts/hosts_test.go:26:31: fmt.Sprintf can be replaced with string concatenation (perfsprint)
"tcp://host:": fmt.Sprintf("tcp://host:%s", defaultHTTPPort),
^
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This patch fixes a bug where labels use the same behavior as `--env`, resulting
in a value to be copied from environment variables with the same name as the
label if no value is set (i.e. a simple key, no `=` sign, no value).
An earlier pull request addressed similar cases for `docker run`;
2b17f4c8a8, but this did not address the
same situation for (e.g.) `docker service create`.
Digging in history for this bug, I found that use of the `ValidateEnv`
function for labels was added in the original implementation of the labels feature in
abb5e9a077 (diff-ae476143d40e21ac0918630f7365ed3cR34)
However, the design never intended it to expand environment variables,
and use of this function was either due to either a "copy/paste" of the
equivalent `--env` flags, or a misunderstanding (the name `ValidateEnv` does
not communicate that it also expands environment variables), and the existing
`ValidateLabel` was designed for _engine_ labels (which required a value to
be set).
Following the initial implementation, other parts of the code followed
the same (incorrect) approach, therefore leading the bug to be introduced
in services as well.
This patch:
- updates the `ValidateLabel` to match the expected validation
rules (this function is no longer used since 31dc5c0a9a),
and the daemon has its own implementation)
- corrects various locations in the code where `ValidateEnv` was used instead of `ValidateLabel`.
Before this patch:
```bash
export SOME_ENV_VAR=I_AM_SOME_ENV_VAR
docker service create --label SOME_ENV_VAR --tty --name test busybox
docker service inspect --format '{{json .Spec.Labels}}' test
{"SOME_ENV_VAR":"I_AM_SOME_ENV_VAR"}
```
After this patch:
```bash
export SOME_ENV_VAR=I_AM_SOME_ENV_VAR
docker service create --label SOME_ENV_VAR --tty --name test busybox
docker container inspect --format '{{json .Config.Labels}}' test
{"SOME_ENV_VAR":""}
```
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
previously docker did import environment variables if they were present
but created them if they were not when it was asked via a --env-file
cli option to import but not create them.
fix is to only import the variable into the environment if it is present.
additionally do not import variable names of zero-length (which are lines
w/ a potential variable definition w/o a variable name).
refs:
- https://github.com/docker/for-linux/issues/284
Signed-off-by: Tom Klingenberg <tklingenberg@lastflood.net>
`--label-file` has the exact same behavior as `--env-file`, meaning any
placeholder (i.e. a simple key, no `=` sign, no value), it will get the
value from the environment variable.
For `--label-file` it should just add an empty label.
Signed-off-by: Vincent Demeester <vincent@sbr.pm>
Sebastiaan van Stijn
Tom Klingenberg
Vincent Demeester