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085e831668
* Update package version * Update makefile targets * Update readme packages * Remaining old packages via rg/sd
87 lines
2.2 KiB
Go
87 lines
2.2 KiB
Go
// ================================================================
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// Support for Miller regression testing. Originally bash scripts; ported to Go
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// for ease of Windows-native testing.
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// ================================================================
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package terminals
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import (
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"fmt"
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"os"
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"runtime"
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"github.com/johnkerl/miller/v6/pkg/terminals/help"
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"github.com/johnkerl/miller/v6/pkg/terminals/regtest"
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"github.com/johnkerl/miller/v6/pkg/terminals/repl"
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"github.com/johnkerl/miller/v6/pkg/version"
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)
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// tTerminalMain is a function-pointer type for the entrypoint handler for a given terminal,
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// such as 'help' or 'regtest'.
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type tTerminalMain func(args []string) int
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type tTerminalLookupEntry struct {
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name string
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main tTerminalMain
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}
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// _TERMINAL_LOOKUP_TABLE is the lookup table for terminals. We get a Golang
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// "initialization loop" if this is defined statically. So, we use a "package
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// init" function.
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var _TERMINAL_LOOKUP_TABLE = []tTerminalLookupEntry{}
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func init() {
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_TERMINAL_LOOKUP_TABLE = []tTerminalLookupEntry{
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{"terminal-list", terminalListMain},
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{"help", help.HelpMain},
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{"regtest", regtest.RegTestMain},
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{"repl", repl.ReplMain},
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{"version", showVersion},
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}
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}
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func Dispatchable(arg string) bool {
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for _, entry := range _TERMINAL_LOOKUP_TABLE {
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if arg == entry.name {
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return true
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}
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}
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return false
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}
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func Dispatch(args []string) {
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if len(args) < 1 {
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return
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}
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terminal := args[0]
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for _, entry := range _TERMINAL_LOOKUP_TABLE {
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if terminal == entry.name {
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os.Exit(entry.main(args))
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}
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}
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fmt.Fprintf(os.Stderr, "mlr: terminal \"%s\" not found.\n", terminal)
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os.Exit(1)
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}
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// terminalListMain is the handler for 'mlr terminal-list'.
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func terminalListMain(args []string) int {
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ShowTerminalEntries(os.Stdout)
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return 0
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}
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// ShowTerminalEntries is a symbol is exported for 'mlr --help'.
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func ShowTerminalEntries(o *os.File) {
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fmt.Fprintf(o, "Available subcommands:\n")
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for _, entry := range _TERMINAL_LOOKUP_TABLE {
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fmt.Fprintf(o, " %s\n", entry.name)
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}
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fmt.Fprintf(o, "For more information, please invoke mlr {subcommand} --help.\n")
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}
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func showVersion(args []string) int {
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fmt.Printf("mlr version %s for %s/%s/%s\n",
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version.STRING, runtime.GOOS, runtime.GOARCH, runtime.Version())
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return 0
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}
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