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git-commit-vandalism/t/t0040-parse-options.sh
SZEDER Gábor fa83cc834d parse-options: add support for parsing subcommands 
Several Git commands have subcommands to implement mutually exclusive
"operation modes", and they usually parse their subcommand argument
with a bunch of if-else if statements.

Teach parse-options to handle subcommands as well, which will result
in shorter and simpler code with consistent error handling and error
messages on unknown or missing subcommand, and it will also make
possible for our Bash completion script to handle subcommands
programmatically.

The approach is guided by the following observations:

  - Most subcommands [1] are implemented in dedicated functions, and
    most of those functions [2] either have a signature matching the
    'int cmd_foo(int argc, const char **argc, const char *prefix)'
    signature of builtin commands or can be trivially converted to
    that signature, because they miss only that last prefix parameter
    or have no parameters at all.

  - Subcommand arguments only have long form, and they have no double
    dash prefix, no negated form, and no description, and they don't
    take any arguments, and can't be abbreviated.

  - There must be exactly one subcommand among the arguments, or zero
    if the command has a default operation mode.

  - All arguments following the subcommand are considered to be
    arguments of the subcommand, and, conversely, arguments meant for
    the subcommand may not preceed the subcommand.

So in the end subcommand declaration and parsing would look something
like this:

    parse_opt_subcommand_fn *fn = NULL;
    struct option builtin_commit_graph_options[] = {
        OPT_STRING(0, "object-dir", &opts.obj_dir, N_("dir"),
                   N_("the object directory to store the graph")),
        OPT_SUBCOMMAND("verify", &fn, graph_verify),
        OPT_SUBCOMMAND("write", &fn, graph_write),
        OPT_END(),
    };
    argc = parse_options(argc, argv, prefix, options,
                         builtin_commit_graph_usage, 0);
    return fn(argc, argv, prefix);

Here each OPT_SUBCOMMAND specifies the name of the subcommand and the
function implementing it, and the address of the same 'fn' subcommand
function pointer.  parse_options() then processes the arguments until
it finds the first argument matching one of the subcommands, sets 'fn'
to the function associated with that subcommand, and returns, leaving
the rest of the arguments unprocessed.  If none of the listed
subcommands is found among the arguments, parse_options() will show
usage and abort.

If a command has a default operation mode, 'fn' should be initialized
to the function implementing that mode, and parse_options() should be
invoked with the PARSE_OPT_SUBCOMMAND_OPTIONAL flag.  In this case
parse_options() won't error out when not finding any subcommands, but
will return leaving 'fn' unchanged.  Note that if that default
operation mode has any --options, then the PARSE_OPT_KEEP_UNKNOWN_OPT
flag is necessary as well (otherwise parse_options() would error out
upon seeing the unknown option meant to the default operation mode).

Some thoughts about the implementation:

  - The same pointer to 'fn' must be specified as 'value' for each
    OPT_SUBCOMMAND, because there can be only one set of mutually
    exclusive subcommands; parse_options() will BUG() otherwise.

    There are other ways to tell parse_options() where to put the
    function associated with the subcommand given on the command line,
    but I didn't like them:

      - Change parse_options()'s signature by adding a pointer to
        subcommand function to be set to the function associated with
        the given subcommand, affecting all callsites, even those that
        don't have subcommands.

      - Introduce a specific parse_options_and_subcommand() variant
        with that extra funcion parameter.

  - I decided against automatically calling the subcommand function
    from within parse_options(), because:

      - There are commands that have to perform additional actions
        after option parsing but before calling the function
        implementing the specified subcommand.

      - The return code of the subcommand is usually the return code
        of the git command, but preserving the return code of the
        automatically called subcommand function would have made the
        API awkward.

  - Also add a OPT_SUBCOMMAND_F() variant to allow specifying an
    option flag: we have two subcommands that are purposefully
    excluded from completion ('git remote rm' and 'git stash save'),
    so they'll have to be specified with the PARSE_OPT_NOCOMPLETE
    flag.

  - Some of the 'parse_opt_flags' don't make sense with subcommands,
    and using them is probably just an oversight or misunderstanding.
    Therefore parse_options() will BUG() when invoked with any of the
    following flags while the options array contains at least one
    OPT_SUBCOMMAND:

      - PARSE_OPT_KEEP_DASHDASH: parse_options() stops parsing
        arguments when encountering a "--" argument, so it doesn't
        make sense to expect and keep one before a subcommand, because
        it would prevent the parsing of the subcommand.

        However, this flag is allowed in combination with the
        PARSE_OPT_SUBCOMMAND_OPTIONAL flag, because the double dash
        might be meaningful for the command's default operation mode,
        e.g. to disambiguate refs and pathspecs.

      - PARSE_OPT_STOP_AT_NON_OPTION: As its name suggests, this flag
        tells parse_options() to stop as soon as it encouners a
        non-option argument, but subcommands are by definition not
        options...  so how could they be parsed, then?!

      - PARSE_OPT_KEEP_UNKNOWN: This flag can be used to collect any
        unknown --options and then pass them to a different command or
        subsystem.  Surely if a command has subcommands, then this
        functionality should rather be delegated to one of those
        subcommands, and not performed by the command itself.

        However, this flag is allowed in combination with the
        PARSE_OPT_SUBCOMMAND_OPTIONAL flag, making possible to pass
        --options to the default operation mode.

  - If the command with subcommands has a default operation mode, then
    all arguments to the command must preceed the arguments of the
    subcommand.

    AFAICT we don't have any commands where this makes a difference,
    because in those commands either only the command accepts any
    arguments ('notes' and 'remote'), or only the default subcommand
    ('reflog' and 'stash'), but never both.

  - The 'argv' array passed to subcommand functions currently starts
    with the name of the subcommand.  Keep this behavior.  AFAICT no
    subcommand functions depend on the actual content of 'argv[0]',
    but the parse_options() call handling their options expects that
    the options start at argv[1].

  - To support handling subcommands programmatically in our Bash
    completion script, 'git cmd --git-completion-helper' will now list
    both subcommands and regular --options, if any.  This means that
    the completion script will have to separate subcommands (i.e.
    words without a double dash prefix) from --options on its own, but
    that's rather easy to do, and it's not much work either, because
    the number of subcommands a command might have is rather low, and
    those commands accept only a single --option or none at all.  An
    alternative would be to introduce a separate option that lists
    only subcommands, but then the completion script would need not
    one but two git invocations and command substitutions for commands
    with subcommands.

    Note that this change doesn't affect the behavior of our Bash
    completion script, because when completing the --option of a
    command with subcommands, e.g. for 'git notes --<TAB>', then all
    subcommands will be filtered out anyway, as none of them will
    match the word to be completed starting with that double dash
    prefix.

[1] Except 'git rerere', because many of its subcommands are
    implemented in the bodies of the if-else if statements parsing the
    command's subcommand argument.

[2] Except 'credential', 'credential-store' and 'fsmonitor--daemon',
    because some of the functions implementing their subcommands take
    special parameters.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-08-19 11:13:14 -07:00

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#!/bin/sh
#
# Copyright (c) 2007 Johannes Schindelin
#
test_description='our own option parser'
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
cat >expect <<\EOF
usage: test-tool parse-options <options>
A helper function for the parse-options API.
--yes get a boolean
-D, --no-doubt begins with 'no-'
-B, --no-fear be brave
-b, --boolean increment by one
-4, --or4 bitwise-or boolean with ...0100
--neg-or4 same as --no-or4
-i, --integer <n> get a integer
-j <n> get a integer, too
-m, --magnitude <n> get a magnitude
--set23 set integer to 23
--mode1 set integer to 1 (cmdmode option)
--mode2 set integer to 2 (cmdmode option)
-L, --length <str> get length of <str>
-F, --file <file> set file to <file>
String options
-s, --string <string>
get a string
--string2 <str> get another string
--st <st> get another string (pervert ordering)
-o <str> get another string
--list <str> add str to list
Magic arguments
-NUM set integer to NUM
+ same as -b
--ambiguous positive ambiguity
--no-ambiguous negative ambiguity
Standard options
--abbrev[=<n>] use <n> digits to display object names
-v, --verbose be verbose
-n, --dry-run dry run
-q, --quiet be quiet
--expect <string> expected output in the variable dump
Alias
-A, --alias-source <string>
get a string
-Z, --alias-target <string>
alias of --alias-source
EOF
test_expect_success 'test help' '
test_must_fail test-tool parse-options -h >output 2>output.err &&
test_must_be_empty output.err &&
test_cmp expect output
'
mv expect expect.err
check () {
what="$1" &&
shift &&
expect="$1" &&
shift &&
test-tool parse-options --expect="$what $expect" "$@"
}
check_unknown_i18n() {
case "$1" in
--*)
echo error: unknown option \`${1#--}\' >expect ;;
-*)
echo error: unknown switch \`${1#-}\' >expect ;;
esac &&
cat expect.err >>expect &&
test_must_fail test-tool parse-options $* >output 2>output.err &&
test_must_be_empty output &&
test_cmp expect output.err
}
test_expect_success 'OPT_BOOL() #1' 'check boolean: 1 --yes'
test_expect_success 'OPT_BOOL() #2' 'check boolean: 1 --no-doubt'
test_expect_success 'OPT_BOOL() #3' 'check boolean: 1 -D'
test_expect_success 'OPT_BOOL() #4' 'check boolean: 1 --no-fear'
test_expect_success 'OPT_BOOL() #5' 'check boolean: 1 -B'
test_expect_success 'OPT_BOOL() is idempotent #1' 'check boolean: 1 --yes --yes'
test_expect_success 'OPT_BOOL() is idempotent #2' 'check boolean: 1 -DB'
test_expect_success 'OPT_BOOL() negation #1' 'check boolean: 0 -D --no-yes'
test_expect_success 'OPT_BOOL() negation #2' 'check boolean: 0 -D --no-no-doubt'
test_expect_success 'OPT_BOOL() no negation #1' 'check_unknown_i18n --fear'
test_expect_success 'OPT_BOOL() no negation #2' 'check_unknown_i18n --no-no-fear'
test_expect_success 'OPT_BOOL() positivation' 'check boolean: 0 -D --doubt'
test_expect_success 'OPT_INT() negative' 'check integer: -2345 -i -2345'
test_expect_success 'OPT_MAGNITUDE() simple' '
check magnitude: 2345678 -m 2345678
'
test_expect_success 'OPT_MAGNITUDE() kilo' '
check magnitude: 239616 -m 234k
'
test_expect_success 'OPT_MAGNITUDE() mega' '
check magnitude: 104857600 -m 100m
'
test_expect_success 'OPT_MAGNITUDE() giga' '
check magnitude: 1073741824 -m 1g
'
test_expect_success 'OPT_MAGNITUDE() 3giga' '
check magnitude: 3221225472 -m 3g
'
cat >expect <<\EOF
boolean: 2
integer: 1729
magnitude: 16384
timestamp: 0
string: 123
abbrev: 7
verbose: 2
quiet: 0
dry run: yes
file: prefix/my.file
EOF
test_expect_success 'short options' '
test-tool parse-options -s123 -b -i 1729 -m 16k -b -vv -n -F my.file \
>output 2>output.err &&
test_cmp expect output &&
test_must_be_empty output.err
'
cat >expect <<\EOF
boolean: 2
integer: 1729
magnitude: 16384
timestamp: 0
string: 321
abbrev: 10
verbose: 2
quiet: 0
dry run: no
file: prefix/fi.le
EOF
test_expect_success 'long options' '
test-tool parse-options --boolean --integer 1729 --magnitude 16k \
--boolean --string2=321 --verbose --verbose --no-dry-run \
--abbrev=10 --file fi.le --obsolete \
>output 2>output.err &&
test_must_be_empty output.err &&
test_cmp expect output
'
test_expect_success 'missing required value' '
cat >expect <<-\EOF &&
error: switch `s'\'' requires a value
EOF
test_expect_code 129 test-tool parse-options -s 2>actual &&
test_cmp expect actual &&
cat >expect <<-\EOF &&
error: option `string'\'' requires a value
EOF
test_expect_code 129 test-tool parse-options --string 2>actual &&
test_cmp expect actual &&
cat >expect <<-\EOF &&
error: option `file'\'' requires a value
EOF
test_expect_code 129 test-tool parse-options --file 2>actual &&
test_cmp expect actual
'
test_expect_success 'superfluous value provided: boolean' '
cat >expect <<-\EOF &&
error: option `yes'\'' takes no value
EOF
test_expect_code 129 test-tool parse-options --yes=hi 2>actual &&
test_cmp expect actual &&
cat >expect <<-\EOF &&
error: option `no-yes'\'' takes no value
EOF
test_expect_code 129 test-tool parse-options --no-yes=hi 2>actual &&
test_cmp expect actual
'
test_expect_success 'superfluous value provided: cmdmode' '
cat >expect <<-\EOF &&
error: option `mode1'\'' takes no value
EOF
test_expect_code 129 test-tool parse-options --mode1=hi 2>actual &&
test_cmp expect actual
'
cat >expect <<\EOF
boolean: 1
integer: 13
magnitude: 0
timestamp: 0
string: 123
abbrev: 7
verbose: -1
quiet: 0
dry run: no
file: (not set)
arg 00: a1
arg 01: b1
arg 02: --boolean
EOF
test_expect_success 'intermingled arguments' '
test-tool parse-options a1 --string 123 b1 --boolean -j 13 -- --boolean \
>output 2>output.err &&
test_must_be_empty output.err &&
test_cmp expect output
'
cat >expect <<\EOF
boolean: 0
integer: 2
magnitude: 0
timestamp: 0
string: (not set)
abbrev: 7
verbose: -1
quiet: 0
dry run: no
file: (not set)
EOF
test_expect_success 'unambiguously abbreviated option' '
GIT_TEST_DISALLOW_ABBREVIATED_OPTIONS=false \
test-tool parse-options --int 2 --boolean --no-bo >output 2>output.err &&
test_must_be_empty output.err &&
test_cmp expect output
'
test_expect_success 'unambiguously abbreviated option with "="' '
GIT_TEST_DISALLOW_ABBREVIATED_OPTIONS=false \
test-tool parse-options --expect="integer: 2" --int=2
'
test_expect_success 'ambiguously abbreviated option' '
test_expect_code 129 env GIT_TEST_DISALLOW_ABBREVIATED_OPTIONS=false \
test-tool parse-options --strin 123
'
test_expect_success 'non ambiguous option (after two options it abbreviates)' '
GIT_TEST_DISALLOW_ABBREVIATED_OPTIONS=false \
test-tool parse-options --expect="string: 123" --st 123
'
test_expect_success 'Alias options do not contribute to abbreviation' '
test-tool parse-options --alias-source 123 >output &&
grep "^string: 123" output &&
test-tool parse-options --alias-target 123 >output &&
grep "^string: 123" output &&
test_must_fail test-tool parse-options --alias &&
GIT_TEST_DISALLOW_ABBREVIATED_OPTIONS=false \
test-tool parse-options --alias 123 >output &&
grep "^string: 123" output
'
cat >typo.err <<\EOF
error: did you mean `--boolean` (with two dashes)?
EOF
test_expect_success 'detect possible typos' '
test_must_fail test-tool parse-options -boolean >output 2>output.err &&
test_must_be_empty output &&
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-tool parse-options -ambiguous >output 2>output.err &&
test_must_be_empty output &&
test_cmp typo.err output.err
'
cat >expect <<\EOF
Callback: "four", 0
boolean: 5
integer: 4
magnitude: 0
timestamp: 0
string: (not set)
abbrev: 7
verbose: -1
quiet: 0
dry run: no
file: (not set)
EOF
test_expect_success 'OPT_CALLBACK() and OPT_BIT() work' '
test-tool parse-options --length=four -b -4 >output 2>output.err &&
test_must_be_empty output.err &&
test_cmp expect output
'
test_expect_success 'OPT_CALLBACK() and callback errors work' '
test_must_fail test-tool parse-options --no-length >output 2>output.err &&
test_must_be_empty output &&
test_must_be_empty output.err
'
cat >expect <<\EOF
boolean: 1
integer: 23
magnitude: 0
timestamp: 0
string: (not set)
abbrev: 7
verbose: -1
quiet: 0
dry run: no
file: (not set)
EOF
test_expect_success 'OPT_BIT() and OPT_SET_INT() work' '
test-tool parse-options --set23 -bbbbb --no-or4 >output 2>output.err &&
test_must_be_empty output.err &&
test_cmp expect output
'
test_expect_success 'OPT_NEGBIT() and OPT_SET_INT() work' '
test-tool parse-options --set23 -bbbbb --neg-or4 >output 2>output.err &&
test_must_be_empty output.err &&
test_cmp expect output
'
test_expect_success 'OPT_BIT() works' '
test-tool parse-options --expect="boolean: 6" -bb --or4
'
test_expect_success 'OPT_NEGBIT() works' '
test-tool parse-options --expect="boolean: 6" -bb --no-neg-or4
'
test_expect_success 'OPT_CMDMODE() works' '
test-tool parse-options --expect="integer: 1" --mode1
'
test_expect_success 'OPT_CMDMODE() detects incompatibility' '
test_must_fail test-tool parse-options --mode1 --mode2 >output 2>output.err &&
test_must_be_empty output &&
test_i18ngrep "incompatible with --mode" output.err
'
test_expect_success 'OPT_CMDMODE() detects incompatibility with something else' '
test_must_fail test-tool parse-options --set23 --mode2 >output 2>output.err &&
test_must_be_empty output &&
test_i18ngrep "incompatible with something else" output.err
'
test_expect_success 'OPT_COUNTUP() with PARSE_OPT_NODASH works' '
test-tool parse-options --expect="boolean: 6" + + + + + +
'
test_expect_success 'OPT_NUMBER_CALLBACK() works' '
test-tool parse-options --expect="integer: 12345" -12345
'
cat >expect <<\EOF
boolean: 0
integer: 0
magnitude: 0
timestamp: 0
string: (not set)
abbrev: 7
verbose: -1
quiet: 0
dry run: no
file: (not set)
EOF
test_expect_success 'negation of OPT_NONEG flags is not ambiguous' '
GIT_TEST_DISALLOW_ABBREVIATED_OPTIONS=false \
test-tool parse-options --no-ambig >output 2>output.err &&
test_must_be_empty output.err &&
test_cmp expect output
'
cat >>expect <<\EOF
list: foo
list: bar
list: baz
EOF
test_expect_success '--list keeps list of strings' '
test-tool parse-options --list foo --list=bar --list=baz >output &&
test_cmp expect output
'
test_expect_success '--no-list resets list' '
test-tool parse-options --list=other --list=irrelevant --list=options \
--no-list --list=foo --list=bar --list=baz >output &&
test_cmp expect output
'
test_expect_success 'multiple quiet levels' '
test-tool parse-options --expect="quiet: 3" -q -q -q
'
test_expect_success 'multiple verbose levels' '
test-tool parse-options --expect="verbose: 3" -v -v -v
'
test_expect_success '--no-quiet sets --quiet to 0' '
test-tool parse-options --expect="quiet: 0" --no-quiet
'
test_expect_success '--no-quiet resets multiple -q to 0' '
test-tool parse-options --expect="quiet: 0" -q -q -q --no-quiet
'
test_expect_success '--no-verbose sets verbose to 0' '
test-tool parse-options --expect="verbose: 0" --no-verbose
'
test_expect_success '--no-verbose resets multiple verbose to 0' '
test-tool parse-options --expect="verbose: 0" -v -v -v --no-verbose
'
test_expect_success 'GIT_TEST_DISALLOW_ABBREVIATED_OPTIONS works' '
GIT_TEST_DISALLOW_ABBREVIATED_OPTIONS=false \
test-tool parse-options --ye &&
test_must_fail env GIT_TEST_DISALLOW_ABBREVIATED_OPTIONS=true \
test-tool parse-options --ye
'
test_expect_success '--end-of-options treats remainder as args' '
test-tool parse-options \
--expect="verbose: -1" \
--expect="arg 00: --verbose" \
--end-of-options --verbose
'
test_expect_success 'KEEP_DASHDASH works' '
test-tool parse-options-flags --keep-dashdash cmd --opt=1 -- --opt=2 --unknown >actual &&
cat >expect <<-\EOF &&
opt: 1
arg 00: --
arg 01: --opt=2
arg 02: --unknown
EOF
test_cmp expect actual
'
test_expect_success 'KEEP_ARGV0 works' '
test-tool parse-options-flags --keep-argv0 cmd arg0 --opt=3 >actual &&
cat >expect <<-\EOF &&
opt: 3
arg 00: cmd
arg 01: arg0
EOF
test_cmp expect actual
'
test_expect_success 'STOP_AT_NON_OPTION works' '
test-tool parse-options-flags --stop-at-non-option cmd --opt=4 arg0 --opt=5 --unknown >actual &&
cat >expect <<-\EOF &&
opt: 4
arg 00: arg0
arg 01: --opt=5
arg 02: --unknown
EOF
test_cmp expect actual
'
test_expect_success 'KEEP_UNKNOWN_OPT works' '
test-tool parse-options-flags --keep-unknown-opt cmd --unknown=1 --opt=6 -u2 >actual &&
cat >expect <<-\EOF &&
opt: 6
arg 00: --unknown=1
arg 01: -u2
EOF
test_cmp expect actual
'
test_expect_success 'NO_INTERNAL_HELP works for -h' '
test_expect_code 129 test-tool parse-options-flags --no-internal-help cmd -h 2>err &&
cat err &&
grep "^error: unknown switch \`h$SQ" err &&
grep "^usage: " err
'
for help_opt in help help-all
do
test_expect_success "NO_INTERNAL_HELP works for --$help_opt" "
test_expect_code 129 test-tool parse-options-flags --no-internal-help cmd --$help_opt 2>err &&
cat err &&
grep '^error: unknown option \`'$help_opt\' err &&
grep '^usage: ' err
"
done
test_expect_success 'KEEP_UNKNOWN_OPT | NO_INTERNAL_HELP works' '
test-tool parse-options-flags --keep-unknown-opt --no-internal-help cmd -h --help --help-all >actual &&
cat >expect <<-\EOF &&
opt: 0
arg 00: -h
arg 01: --help
arg 02: --help-all
EOF
test_cmp expect actual
'
test_expect_success 'subcommand - no subcommand shows error and usage' '
test_expect_code 129 test-tool parse-subcommand cmd 2>err &&
grep "^error: need a subcommand" err &&
grep ^usage: err
'
test_expect_success 'subcommand - subcommand after -- shows error and usage' '
test_expect_code 129 test-tool parse-subcommand cmd -- subcmd-one 2>err &&
grep "^error: need a subcommand" err &&
grep ^usage: err
'
test_expect_success 'subcommand - subcommand after --end-of-options shows error and usage' '
test_expect_code 129 test-tool parse-subcommand cmd --end-of-options subcmd-one 2>err &&
grep "^error: need a subcommand" err &&
grep ^usage: err
'
test_expect_success 'subcommand - unknown subcommand shows error and usage' '
test_expect_code 129 test-tool parse-subcommand cmd nope 2>err &&
grep "^error: unknown subcommand: \`nope$SQ" err &&
grep ^usage: err
'
test_expect_success 'subcommand - subcommands cannot be abbreviated' '
test_expect_code 129 test-tool parse-subcommand cmd subcmd-o 2>err &&
grep "^error: unknown subcommand: \`subcmd-o$SQ$" err &&
grep ^usage: err
'
test_expect_success 'subcommand - no negated subcommands' '
test_expect_code 129 test-tool parse-subcommand cmd no-subcmd-one 2>err &&
grep "^error: unknown subcommand: \`no-subcmd-one$SQ" err &&
grep ^usage: err
'
test_expect_success 'subcommand - simple' '
test-tool parse-subcommand cmd subcmd-two >actual &&
cat >expect <<-\EOF &&
opt: 0
fn: subcmd_two
arg 00: subcmd-two
EOF
test_cmp expect actual
'
test_expect_success 'subcommand - stop parsing at the first subcommand' '
test-tool parse-subcommand cmd --opt=1 subcmd-two subcmd-one --opt=2 >actual &&
cat >expect <<-\EOF &&
opt: 1
fn: subcmd_two
arg 00: subcmd-two
arg 01: subcmd-one
arg 02: --opt=2
EOF
test_cmp expect actual
'
test_expect_success 'subcommand - KEEP_ARGV0' '
test-tool parse-subcommand --keep-argv0 cmd subcmd-two >actual &&
cat >expect <<-\EOF &&
opt: 0
fn: subcmd_two
arg 00: cmd
arg 01: subcmd-two
EOF
test_cmp expect actual
'
test_expect_success 'subcommand - SUBCOMMAND_OPTIONAL + subcommand not given' '
test-tool parse-subcommand --subcommand-optional cmd >actual &&
cat >expect <<-\EOF &&
opt: 0
fn: subcmd_one
EOF
test_cmp expect actual
'
test_expect_success 'subcommand - SUBCOMMAND_OPTIONAL + given subcommand' '
test-tool parse-subcommand --subcommand-optional cmd subcmd-two branch file >actual &&
cat >expect <<-\EOF &&
opt: 0
fn: subcmd_two
arg 00: subcmd-two
arg 01: branch
arg 02: file
EOF
test_cmp expect actual
'
test_expect_success 'subcommand - SUBCOMMAND_OPTIONAL + subcommand not given + unknown dashless args' '
test-tool parse-subcommand --subcommand-optional cmd branch file >actual &&
cat >expect <<-\EOF &&
opt: 0
fn: subcmd_one
arg 00: branch
arg 01: file
EOF
test_cmp expect actual
'
test_expect_success 'subcommand - SUBCOMMAND_OPTIONAL + subcommand not given + unknown option' '
test_expect_code 129 test-tool parse-subcommand --subcommand-optional cmd --subcommand-opt 2>err &&
grep "^error: unknown option" err &&
grep ^usage: err
'
test_expect_success 'subcommand - SUBCOMMAND_OPTIONAL | KEEP_UNKNOWN_OPT + subcommand not given + unknown option' '
test-tool parse-subcommand --subcommand-optional --keep-unknown-opt cmd --subcommand-opt >actual &&
cat >expect <<-\EOF &&
opt: 0
fn: subcmd_one
arg 00: --subcommand-opt
EOF
test_cmp expect actual
'
test_expect_success 'subcommand - SUBCOMMAND_OPTIONAL | KEEP_UNKNOWN_OPT + subcommand ignored after unknown option' '
test-tool parse-subcommand --subcommand-optional --keep-unknown-opt cmd --subcommand-opt subcmd-two >actual &&
cat >expect <<-\EOF &&
opt: 0
fn: subcmd_one
arg 00: --subcommand-opt
arg 01: subcmd-two
EOF
test_cmp expect actual
'
test_expect_success 'subcommand - SUBCOMMAND_OPTIONAL | KEEP_UNKNOWN_OPT + command and subcommand options cannot be mixed' '
test-tool parse-subcommand --subcommand-optional --keep-unknown-opt cmd --subcommand-opt branch --opt=1 >actual &&
cat >expect <<-\EOF &&
opt: 0
fn: subcmd_one
arg 00: --subcommand-opt
arg 01: branch
arg 02: --opt=1
EOF
test_cmp expect actual
'
test_expect_success 'subcommand - SUBCOMMAND_OPTIONAL | KEEP_UNKNOWN_OPT | KEEP_ARGV0' '
test-tool parse-subcommand --subcommand-optional --keep-unknown-opt --keep-argv0 cmd --subcommand-opt branch >actual &&
cat >expect <<-\EOF &&
opt: 0
fn: subcmd_one
arg 00: cmd
arg 01: --subcommand-opt
arg 02: branch
EOF
test_cmp expect actual
'
test_expect_success 'subcommand - SUBCOMMAND_OPTIONAL | KEEP_UNKNOWN_OPT | KEEP_DASHDASH' '
test-tool parse-subcommand --subcommand-optional --keep-unknown-opt --keep-dashdash cmd -- --subcommand-opt file >actual &&
cat >expect <<-\EOF &&
opt: 0
fn: subcmd_one
arg 00: --
arg 01: --subcommand-opt
arg 02: file
EOF
test_cmp expect actual
'
test_expect_success 'subcommand - completion helper' '
test-tool parse-subcommand cmd --git-completion-helper >actual &&
echo "subcmd-one subcmd-two --opt= --no-opt" >expect &&
test_cmp expect actual
'
test_expect_success 'subcommands are incompatible with STOP_AT_NON_OPTION' '
test_must_fail test-tool parse-subcommand --stop-at-non-option cmd subcmd-one 2>err &&
grep ^BUG err
'
test_expect_success 'subcommands are incompatible with KEEP_UNKNOWN_OPT unless in combination with SUBCOMMAND_OPTIONAL' '
test_must_fail test-tool parse-subcommand --keep-unknown-opt cmd subcmd-two 2>err &&
grep ^BUG err
'
test_expect_success 'subcommands are incompatible with KEEP_DASHDASH unless in combination with SUBCOMMAND_OPTIONAL' '
test_must_fail test-tool parse-subcommand --keep-dashdash cmd subcmd-two 2>err &&
grep ^BUG err
'
test_done
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