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parse-options: typo check for unknown switches 

The user specifies a long option but forgets to type the second
leading dash, we currently detect and report that fact if its first
letter is a valid short option. This is done for safety, to avoid
ambiguity between short options (and their arguments) and a long
option with a missing dash.

This diagnostic message is also helpful for long options whose first
letter is not a valid short option, however. Print it in that case,
too, as a courtesy.

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
René Scharfe 2012-03-03 12:00:29 +01:00 committed by Junio C Hamano
parent b22939a286
commit 38916c5b47
2 changed files with 12 additions and 0 deletions
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2
parse-options.c
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@ -393,6 +393,8 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
case -1:
return parse_options_usage(ctx, usagestr, options, 1);
case -2:
if (ctx->opt)
check_typos(arg + 1, options);
goto unknown;
}
if (ctx->opt)

10
t/t0040-parse-options.sh
View File

@ -236,6 +236,16 @@ test_expect_success 'detect possible typos' '
test_cmp typo.err output.err
'
cat > typo.err << EOF
error: did you mean \`--ambiguous\` (with two dashes ?)
EOF
test_expect_success 'detect possible typos' '
test_must_fail test-parse-options -ambiguous > output 2> output.err &&
test ! -s output &&
test_cmp typo.err output.err
'
cat > expect <<EOF
boolean: 0
integer: 0