goon

goon

https://git.tonybtw.com/goon.git git://git.tonybtw.com/goon.git
goon / src / main.c
3,249 bytes raw
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#include "goon.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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static void print_usage(const char *prog) {
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    fprintf(stderr, "usage: %s <command> [options]\n", prog);
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    fprintf(stderr, "\n");
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    fprintf(stderr, "commands:\n");
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    fprintf(stderr, "  eval <file>     evaluate file and output JSON\n");
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    fprintf(stderr, "  check <file>    validate syntax\n");
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    fprintf(stderr, "\n");
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    fprintf(stderr, "options:\n");
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    fprintf(stderr, "  -p, --pretty    pretty print JSON output\n");
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    fprintf(stderr, "  -h, --help      show this help\n");
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    fprintf(stderr, "  -v, --version   show version\n");
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}
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static void print_version(void) {
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    printf("goon %s\n", GOON_VERSION);
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}
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static int cmd_eval(const char *path, bool pretty) {
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    Goon_Ctx *ctx = goon_create();
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    if (!ctx) {
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        fprintf(stderr, "error: failed to create context\n");
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        return 1;
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    }
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    if (!goon_load_file(ctx, path)) {
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        const Goon_Error *err = goon_get_error_info(ctx);
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        if (err) {
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            goon_error_print(err);
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        } else {
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            fprintf(stderr, "error: unknown error\n");
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        }
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        goon_destroy(ctx);
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        return 1;
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    }
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    Goon_Value *result = goon_eval_result(ctx);
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    char *json = pretty ? goon_to_json_pretty(result, 2) : goon_to_json(result);
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    if (json) {
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        printf("%s\n", json);
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        free(json);
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    }
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    goon_destroy(ctx);
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    return 0;
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}
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static int cmd_check(const char *path) {
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    Goon_Ctx *ctx = goon_create();
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    if (!ctx) {
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        fprintf(stderr, "error: failed to create context\n");
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        return 1;
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    }
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    if (!goon_load_file(ctx, path)) {
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        const Goon_Error *err = goon_get_error_info(ctx);
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        if (err) {
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            goon_error_print(err);
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        } else {
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            fprintf(stderr, "error: unknown error\n");
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        }
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        goon_destroy(ctx);
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        return 1;
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    }
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    goon_destroy(ctx);
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    return 0;
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}
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int main(int argc, char **argv) {
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    if (argc < 2) {
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        print_usage(argv[0]);
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        return 1;
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    }
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    const char *cmd = argv[1];
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    if (strcmp(cmd, "-h") == 0 || strcmp(cmd, "--help") == 0) {
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        print_usage(argv[0]);
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        return 0;
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    }
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    if (strcmp(cmd, "-v") == 0 || strcmp(cmd, "--version") == 0) {
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        print_version();
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        return 0;
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    }
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    if (strcmp(cmd, "eval") == 0) {
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        if (argc < 3) {
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            fprintf(stderr, "error: eval requires a file argument\n");
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            return 1;
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        }
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        bool pretty = false;
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        const char *path = NULL;
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        for (int i = 2; i < argc; i++) {
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            if (strcmp(argv[i], "-p") == 0 || strcmp(argv[i], "--pretty") == 0) {
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                pretty = true;
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            } else if (!path) {
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                path = argv[i];
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            }
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        }
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        if (!path) {
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            fprintf(stderr, "error: eval requires a file argument\n");
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            return 1;
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        }
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        return cmd_eval(path, pretty);
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    }
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    if (strcmp(cmd, "check") == 0) {
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        if (argc < 3) {
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            fprintf(stderr, "error: check requires a file argument\n");
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            return 1;
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        }
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        return cmd_check(argv[2]);
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    }
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    fprintf(stderr, "error: unknown command '%s'\n", cmd);
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    print_usage(argv[0]);
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    return 1;
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}