I think It's more obvious now to understand the inheritance of flags.
Fix#403Fix#404
Performance improvements:
benchmark old ns/op new ns/op delta
BenchmarkInheritedFlags-4 6536 5595 -14.40%
BenchmarkLocalFlags-4 3193 3235 +1.32%
benchmark old allocs new allocs delta
BenchmarkInheritedFlags-4 49 39 -20.41%
BenchmarkLocalFlags-4 23 21 -8.70%
benchmark old bytes new bytes delta
BenchmarkInheritedFlags-4 2040 1000 -50.98%
BenchmarkLocalFlags-4 1008 544 -46.03%
* Moving final return outside of if-else
* Removing type declarations that Go can infer from values
* Cleaning up some existing comments
* Changing snake_case variables to camelCase
Added the ability to have hidden commands that cobra will still run as intended, however they won't show up in any usage/help text
adding internal field to command
private is a better name
hiding private commands in default help/usage
opting for 'hidden' over 'private'
updating all 'help command' checks to exclude hidden commands
updating how commands are displayed in usage/help text by updating/adding some methods. added tests for hidden/deprecated commands
making command hidden when testing hidden command execution
test now leverage the included suite and are much less custom. also removed deprecation tests, once I discovered them in cobra_test.go
updating hidden command test to be more reliable
removing unnecessary () when checking len(c.Deprecated)
updating command comments to be godoc friendly
This patch enables developers to add one to many template functions that
can be used by custom Usage and Help templates. Here is an example that
is included in the file cobra_test.go as the test function named
TestAddTemplateFunctions:
AddTemplateFunc("t", func() bool { return true })
AddTemplateFuncs(template.FuncMap{
"f": func() bool { return false },
"h": func() string { return "Hello," },
"w": func() string { return "world." }})
const usage = "Hello, world."
c := &Command{}
c.SetUsageTemplate(`{{if t}}{{h}}{{end}}{{if f}}{{h}}{{end}} {{w}}`)
if us := c.UsageString(); us != usage {
t.Errorf("c.UsageString() != \"%s\", is \"%s\"", usage, us)
}
In the above example four functions are added to the template function
map used when the Usage and Help text is generated from the templates
that enable custom logic as well as data injection during template
execution.
```go
package main
import (
"github.com/spf13/cobra"
"github.com/spf13/pflag"
)
func main() {
cmd := &cobra.Command{
Use: "min",
Short: "minimal command",
Run: func(_ *cobra.Command, _ []string) {},
}
pflag.String("oncmdline", "oncmdline", "oncmdline")
cmd.Execute()
}
```
Is a minimal cobra program. When --help is displayed without this patch
you only get:
But with the patch --oncmdline is shows under flags.
Calling `cobra-test echo times one two turkey` where `one` and `two` are
valid arguments but `turkey` is not now results in.
Error: invalid argument "turkey" for "cobra-test echo times"
Run 'cobra-test echo times --help' for usage.
This fixes a problem where if you had a root command and a grand child
with the same name, the parser would break and would not run the
grandchild. The code was special casing if the immediate child had the
same name, but didn't handle grand-children
by now, if someone calls: `program --validflag unknowncommand` the
output will be:
```
Error: unknown command "--validflag"
Run 'program help' for usage.
```
This patch strips out flags so the unknown command is printed:
```
Error: unknown command "unknowncommand"
Run 'program help' for usage.
```
An example from the kubernetes project, for the `kubectl config`
command, which as subcommands, and flags, and all sorts of stuff, it
will generate markdown like so:
config modifies .kubeconfig files
config modifies .kubeconfig files using subcommands like "kubectl config set current-context my-context"
```
kubectl config SUBCOMMAND
```
```
--envvar=false: use the .kubeconfig from $KUBECONFIG
--global=false: use the .kubeconfig from /home/username
-h, --help=false: help for config
--kubeconfig="": use a particular .kubeconfig file
--local=false: use the .kubeconfig in the current directory
```
```
--alsologtostderr=false: log to standard error as well as files
--api-version="": The API version to use when talking to the server
-a, --auth-path="": Path to the auth info file. If missing, prompt the user. Only used if using https.
--certificate-authority="": Path to a cert. file for the certificate authority.
--client-certificate="": Path to a client key file for TLS.
--client-key="": Path to a client key file for TLS.
--cluster="": The name of the kubeconfig cluster to use
--context="": The name of the kubeconfig context to use
--insecure-skip-tls-verify=false: If true, the server's certificate will not be checked for validity. This will make your HTTPS connections insecure.
--log_backtrace_at=:0: when logging hits line file:N, emit a stack trace
--log_dir=: If non-empty, write log files in this directory
--log_flush_frequency=5s: Maximum number of seconds between log flushes
--logtostderr=true: log to standard error instead of files
--match-server-version=false: Require server version to match client version
--namespace="": If present, the namespace scope for this CLI request.
--password="": Password for basic authentication to the API server.
-s, --server="": The address and port of the Kubernetes API server
--stderrthreshold=2: logs at or above this threshold go to stderr
--token="": Bearer token for authentication to the API server.
--user="": The name of the kubeconfig user to use
--username="": Username for basic authentication to the API server.
--v=0: log level for V logs
--validate=false: If true, use a schema to validate the input before sending it
--vmodule=: comma-separated list of pattern=N settings for file-filtered logging
```
* [kubectl](kubectl.md) - kubectl controls the Kubernetes cluster manager
* [kubectl config set](kubectl_config_set.md) - Sets an individual value in a .kubeconfig file
* [kubectl config set-cluster](kubectl_config_set-cluster.md) - Sets a cluster entry in .kubeconfig
* [kubectl config set-context](kubectl_config_set-context.md) - Sets a context entry in .kubeconfig
* [kubectl config set-credentials](kubectl_config_set-credentials.md) - Sets a user entry in .kubeconfig
* [kubectl config unset](kubectl_config_unset.md) - Unsets an individual value in a .kubeconfig file
* [kubectl config use-context](kubectl_config_use-context.md) - Sets the current-context in a .kubeconfig file
* [kubectl config view](kubectl_config_view.md) - displays merged .kubeconfig settings or a specified .kubeconfig file.
The current (desired) behavior when a Command specifies a flag that
has the same name as a persistent/inherited flag, is that the local
definition takes precedence. This change updates the various
Flag subset functions to respect that behavior:
* LocalFlags: now returns only the set of flags and persistent flags
attached to the Command itself.
* InheritedFlags: now returns only the set of persistent flags inherited
from the Command's parent(s), excluding any that are overwritten by a
local flag.
* NonInheritedFlags: changed to an alias of LocalFlags.
* AllPersistentFlags: removed as not very useful; it returned the set
of all persistent flags attached to the Command and its parent(s).
Default UsageTemplate updated to use LocalFlags and InheritedFlags
For a single root command with a Run method, the help output still
contains 'help [command]' as a subcommand (because Help is always
added). Since the only subcommand would be 'help', the help is better
off omitted.
This change allows a command to be used both as a subcommand
or a root command without having to define a custom help that elides
the help command when no subcommands are added. Instead, the default
help command is only added when subcommands are present.
Albert Nigmatzianov