diff options
Diffstat (limited to 'cmd')
| -rw-r--r-- | cmd/maleeni/compile.go | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/cmd/maleeni/compile.go b/cmd/maleeni/compile.go index 21e5058..2fcb8ad 100644 --- a/cmd/maleeni/compile.go +++ b/cmd/maleeni/compile.go @@ -15,7 +15,6 @@ import ( var compileFlags = struct { debug *bool - lexSpec *string compLv *int output *string }{} @@ -25,17 +24,24 @@ func init() { Use: "compile", Short: "Compile a lexical specification into a DFA", Long: `compile takes a lexical specification and generates a DFA accepting the tokens described in the specification.`, - Example: ` cat lexspec.json | maleeni compile > clexspec.json`, + Example: ` Read from/Write to the specified file: + maleeni compile lexspec.json -o clexspec.json + Read from stdin and write to stdout: + cat lexspec.json | maleeni compile`, + Args: cobra.MaximumNArgs(1), RunE: runCompile, } - compileFlags.lexSpec = cmd.Flags().StringP("lex-spec", "l", "", "lexical specification file path (default stdin)") compileFlags.compLv = cmd.Flags().Int("compression-level", compiler.CompressionLevelMax, "compression level") compileFlags.output = cmd.Flags().StringP("output", "o", "", "output file path (default stdout)") rootCmd.AddCommand(cmd) } func runCompile(cmd *cobra.Command, args []string) (retErr error) { - lspec, err := readLexSpec(*compileFlags.lexSpec) + var path string + if len(args) > 0 { + path = args[0] + } + lspec, err := readLexSpec(path) if err != nil { return fmt.Errorf("Cannot read a lexical specification: %w", err) } |