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Code Issues Releases Activity

Improve usage message

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This commit is contained in:
Nicolas Williams
2015-05-29 15:35:30 -05:00
parent 33874eb513
commit 74ecb88935
1 changed files with 26 additions and 25 deletions
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51
main.c
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@@ -27,31 +27,32 @@ static void usage(int code) {
if (code == 0)
f = stdout;
#ifdef BAIL
#undef BAIL
#endif
#define BAIL(expr) do { if ((expr) < 0 && code == 0) code = 2; } while (0)
BAIL(fprintf(f, "\njq - commandline JSON processor [version %s]\n", JQ_VERSION));
BAIL(fprintf(f, "Usage: %s [options] <jq filter> [file...]\n\n", progname));
BAIL(fprintf(f, "\tjq is a tool for processing JSON inputs, applying the\n"));
BAIL(fprintf(f, "\tgiven filter to its JSON text inputs and producing the\n"));
BAIL(fprintf(f, "\tfilter's results as JSON on standard output.\n"));
BAIL(fprintf(f, "\tThe simplest filter is ., which is the identity filter,\n"));
BAIL(fprintf(f, "\tcopying jq's input to its output.\n"));
BAIL(fprintf(f, "\tFor more advanced filters see the jq(1) manpage (\"man jq\")\n"));
BAIL(fprintf(f, "\tand/or http://stedolan.github.com/jq\n\n"));
BAIL(fprintf(f, "\tSome of the options include:\n"));
BAIL(fprintf(f, "\t -h\t\tthis message;\n"));
BAIL(fprintf(f, "\t -c\t\tcompact instead of pretty-printed output;\n"));
BAIL(fprintf(f, "\t -n\t\tuse `null` as the single input value;\n"));
BAIL(fprintf(f, "\t -s\t\tread (slurp) all inputs into an array; apply filter to it;\n"));
BAIL(fprintf(f, "\t -r\t\toutput raw strings, not JSON texts;\n"));
BAIL(fprintf(f, "\t -R\t\tread raw strings, not JSON texts;\n"));
BAIL(fprintf(f, "\t --arg a v\tset variable $a to value <v>;\n"));
BAIL(fprintf(f, "\t --argjson a v\tset variable $a to JSON value <v>;\n"));
BAIL(fprintf(f, "\t --slurpfile a f\tset variable $a to an array of JSON texts read from <f>;\n"));
BAIL(fprintf(f, "\tSee the manpage for more options.\n"));
exit(code);
int ret = fprintf(f,
"jq - commandline JSON processor [version %s]\n"
"Usage: %s [options] <jq filter> [file...]\n\n"
"\tjq is a tool for processing JSON inputs, applying the\n"
"\tgiven filter to its JSON text inputs and producing the\n"
"\tfilter's results as JSON on standard output.\n"
"\tThe simplest filter is ., which is the identity filter,\n"
"\tcopying jq's input to its output unmodified (except for\n"
"\tformatting).\n"
"\tFor more advanced filters see the jq(1) manpage (\"man jq\")\n"
"\tand/or http://stedolan.github.com/jq\n\n"
"\tSome of the options include:\n"
"\t -c\t\tcompact instead of pretty-printed output;\n"
"\t -n\t\tuse `null` as the single input value;\n"
"\t -e\t\tset the exit status code based on the output;\n"
"\t -s\t\tread (slurp) all inputs into an array; apply filter to it;\n"
"\t -r\t\toutput raw strings, not JSON texts;\n"
"\t -R\t\tread raw strings, not JSON texts;\n"
"\t -C\t\tcolorize JSON;\n"
"\t -M\t\tmonochrome (don't colorize JSON);\n"
"\t -S\t\tsort keys of objects on output;\n"
"\t --arg a v\tset variable $a to value <v>;\n"
"\t --argjson a v\tset variable $a to JSON value <v>;\n"
"\t --slurpfile a f\tset variable $a to an array of JSON texts read from <f>;\n"
"\tSee the manpage for more options.\n", JQ_VERSION, progname);
exit((ret < 0 && code == 0) ? 2 : code);
}
static void die() {