cli/pkg/cmd/root/help_topic.go
2022-09-14 09:23:55 +04:00

188 lines
7.4 KiB
Go

package root
import (
"fmt"
"io"
"github.com/MakeNowJust/heredoc"
"github.com/cli/cli/v2/internal/text"
"github.com/cli/cli/v2/pkg/iostreams"
"github.com/spf13/cobra"
)
var HelpTopics = map[string]map[string]string{
"mintty": {
"short": "Information about using gh with MinTTY",
"long": heredoc.Doc(`
MinTTY is the terminal emulator that comes by default with Git
for Windows. It has known issues with gh's ability to prompt a
user for input.
There are a few workarounds to make gh work with MinTTY:
- Reinstall Git for Windows, checking "Enable experimental support for pseudo consoles".
- Use a different terminal emulator with Git for Windows like Windows Terminal.
You can run "C:\Program Files\Git\bin\bash.exe" from any terminal emulator to continue
using all of the tooling in Git For Windows without MinTTY.
- Prefix invocations of gh with winpty, eg: "winpty gh auth login".
NOTE: this can lead to some UI bugs.
`),
},
"environment": {
"short": "Environment variables that can be used with gh",
"long": heredoc.Doc(`
GH_TOKEN, GITHUB_TOKEN (in order of precedence): an authentication token for github.com
API requests. Setting this avoids being prompted to authenticate and takes precedence over
previously stored credentials.
GH_ENTERPRISE_TOKEN, GITHUB_ENTERPRISE_TOKEN (in order of precedence): an authentication
token for API requests to GitHub Enterprise. When setting this, also set GH_HOST.
GH_HOST: specify the GitHub hostname for commands that would otherwise assume the
"github.com" host when not in a context of an existing repository.
GH_REPO: specify the GitHub repository in the "[HOST/]OWNER/REPO" format for commands
that otherwise operate on a local repository.
GH_EDITOR, GIT_EDITOR, VISUAL, EDITOR (in order of precedence): the editor tool to use
for authoring text.
GH_BROWSER, BROWSER (in order of precedence): the web browser to use for opening links.
GH_DEBUG: set to a truthy value to enable verbose output on standard error. Set to "api"
to additionally log details of HTTP traffic.
DEBUG (deprecated): set to "1", "true", or "yes" to enable verbose output on standard
error.
GH_PAGER, PAGER (in order of precedence): a terminal paging program to send standard output
to, e.g. "less".
GLAMOUR_STYLE: the style to use for rendering Markdown. See
<https://github.com/charmbracelet/glamour#styles>
NO_COLOR: set to any value to avoid printing ANSI escape sequences for color output.
CLICOLOR: set to "0" to disable printing ANSI colors in output.
CLICOLOR_FORCE: set to a value other than "0" to keep ANSI colors in output
even when the output is piped.
GH_FORCE_TTY: set to any value to force terminal-style output even when the output is
redirected. When the value is a number, it is interpreted as the number of columns
available in the viewport. When the value is a percentage, it will be applied against
the number of columns available in the current viewport.
GH_NO_UPDATE_NOTIFIER: set to any value to disable update notifications. By default, gh
checks for new releases once every 24 hours and displays an upgrade notice on standard
error if a newer version was found.
GH_CONFIG_DIR: the directory where gh will store configuration files. Default:
"$XDG_CONFIG_HOME/gh" or "$HOME/.config/gh".
GH_PROMPT_DISABLED: set to any value to disable interactive prompting in the terminal.
`),
},
"reference": {
"short": "A comprehensive reference of all gh commands",
},
"formatting": {
"short": "Formatting options for JSON data exported from gh",
"long": heredoc.Docf(`
Some gh commands support exporting the data as JSON as an alternative to their usual
line-based plain text output. This is suitable for passing structured data to scripts.
The JSON output is enabled with the %[1]s--json%[1]s option, followed by the list of fields
to fetch. Use the flag without a value to get the list of available fields.
The %[1]s--jq%[1]s option accepts a query in jq syntax and will print only the resulting
values that match the query. This is equivalent to piping the output to %[1]sjq -r%[1]s,
but does not require the jq utility to be installed on the system. To learn more
about the query syntax, see: <https://stedolan.github.io/jq/manual/v1.6/>
With %[1]s--template%[1]s, the provided Go template is rendered using the JSON data as input.
For the syntax of Go templates, see: <https://golang.org/pkg/text/template/>
The following functions are available in templates:
- %[1]sautocolor%[1]s: like %[1]scolor%[1]s, but only emits color to terminals
- %[1]scolor <style> <input>%[1]s: colorize input using <https://github.com/mgutz/ansi>
- %[1]sjoin <sep> <list>%[1]s: joins values in the list using a separator
- %[1]spluck <field> <list>%[1]s: collects values of a field from all items in the input
- %[1]stablerow <fields>...%[1]s: aligns fields in output vertically as a table
- %[1]stablerender%[1]s: renders fields added by tablerow in place
- %[1]stimeago <time>%[1]s: renders a timestamp as relative to now
- %[1]stimefmt <format> <time>%[1]s: formats a timestamp using Go's Time.Format function
- %[1]struncate <length> <input>%[1]s: ensures input fits within length
`, "`"),
"example": heredoc.Doc(`
# format issues as table
$ gh issue list --json number,title --template \
'{{range .}}{{tablerow (printf "#%v" .number | autocolor "green") .title}}{{end}}'
# format a pull request using multiple tables with headers
$ gh pr view 3519 --json number,title,body,reviews,assignees --template \
'{{printf "#%v" .number}} {{.title}}
{{.body}}
{{tablerow "ASSIGNEE" "NAME"}}{{range .assignees}}{{tablerow .login .name}}{{end}}{{tablerender}}
{{tablerow "REVIEWER" "STATE" "COMMENT"}}{{range .reviews}}{{tablerow .author.login .state .body}}{{end}}
'
`),
},
"exit-codes": {
"short": "Exit codes used by gh",
"long": heredoc.Doc(`
gh follows normal conventions regarding exit codes.
- If a command completes successfully, the exit code will be 0
- If a command fails for any reason, the exit code will be 1
- If a command is running but gets cancelled, the exit code will be 2
- If a command encounters an authentication issue, the exit code will be 4
NOTE: It is possible that a particular command may have more exit codes, so it is a good
practice to check documentation for the command if you are relying on exit codes to
control some behavior.
`),
},
}
func NewHelpTopic(ios *iostreams.IOStreams, topic string) *cobra.Command {
cmd := &cobra.Command{
Use: topic,
Short: HelpTopics[topic]["short"],
Long: HelpTopics[topic]["long"],
Example: HelpTopics[topic]["example"],
Hidden: true,
Annotations: map[string]string{
"markdown:generate": "true",
"markdown:basename": "gh_help_" + topic,
},
}
cmd.SetHelpFunc(func(c *cobra.Command, args []string) {
helpTopicHelpFunc(ios.Out, c, args)
})
cmd.SetUsageFunc(func(c *cobra.Command) error {
return helpTopicUsageFunc(ios.ErrOut, c)
})
return cmd
}
func helpTopicHelpFunc(w io.Writer, command *cobra.Command, args []string) {
fmt.Fprint(w, command.Long)
if command.Example != "" {
fmt.Fprintf(w, "\n\nEXAMPLES\n")
fmt.Fprint(w, text.Indent(command.Example, " "))
}
}
func helpTopicUsageFunc(w io.Writer, command *cobra.Command) error {
fmt.Fprintf(w, "Usage: gh help %s", command.Use)
return nil
}