cli: add space separator for keyword, string, and int arguments

Defer the complication of optional boolean arguments for later (never?).

command-line-arguments.c

@@ -133,6 +133,11 @@ parse_option (int argc, char **argv, const notmuch_opt_desc_t *options, int opt_
 
     const char *arg = _arg + 2; /* _arg starts with -- */
     const notmuch_opt_desc_t *try;
+
+    const char *next_arg = NULL;
+    if (opt_index < argc - 1  && strncmp (argv[opt_index + 1], "--", 2) != 0)
+	next_arg = argv[opt_index + 1];
+
     for (try = options; try->opt_type != NOTMUCH_OPT_END; try++) {
 	if (try->opt_type == NOTMUCH_OPT_INHERIT) {
 	    int new_index = parse_option (argc, argv, try->output_var, opt_index);
@@ -158,6 +163,12 @@ parse_option (int argc, char **argv, const notmuch_opt_desc_t *options, int opt_
 	if (next != '=' && next != ':' && next != '\0')
 	    continue;
 
+	if (next == '\0' && next_arg != NULL && try->opt_type != NOTMUCH_OPT_BOOLEAN) {
+	    next = ' ';
+	    value = next_arg;
+	    opt_index ++;
+	}
+
 	if (try->output_var == NULL)
 	    INTERNAL_ERROR ("output pointer NULL for option %s", try->name);
 

doc/man1/notmuch.rst

@@ -125,6 +125,20 @@ users to have their own notmuch related tools to be run via the
 notmuch command. By design, this does not allow notmuch's own commands
 to be overriden using external commands.
 
+OPTION SYNTAX
+-------------
+
+All options accepting an argument can be used with '=' or ':' as a
+separator. For the cases where it's not ambiguous (in particular
+excluding boolean options), a space can also be used. The following
+are all equivalent:
+
+::
+
+   notmuch --config=alt-config config get user.name
+   notmuch --config:alt-config config get user.name
+   notmuch --config alt-config config get user.name
+
 ENVIRONMENT
 ===========
 

test/T030-config.sh

@@ -69,6 +69,14 @@ notmuch --config=alt-config config set user.name "Another Name"
 test_expect_equal "$(notmuch --config=alt-config config get user.name)" \
     "Another Name"
 
+test_begin_subtest "Top level --config:FILE option"
+test_expect_equal "$(notmuch --config:alt-config config get user.name)" \
+    "Another Name"
+
+test_begin_subtest "Top level --config<space>FILE option"
+test_expect_equal "$(notmuch --config  alt-config config get user.name)" \
+    "Another Name"
+
 test_begin_subtest "Top level --config=FILE option changed the right file"
 test_expect_equal "$(notmuch config get user.name)" \
     "Notmuch Test Suite"

test/T690-command-line-args.sh

@@ -3,7 +3,7 @@
 test_description="command line arguments"
 . ./test-lib.sh || exit 1
 
-NOTMUCH_NEW > /dev/null
+add_message
 
 test_begin_subtest 'bad option to show'
 notmuch show --frobnicate >& OUTPUT
@@ -12,4 +12,74 @@ Unrecognized option: --frobnicate
 EOF
 test_expect_equal_file EXPECTED OUTPUT
 
+test_begin_subtest 'string option with space'
+cp /dev/null EXPECTED
+notmuch dump --output foo.txt '*' >& OUTPUT
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest 'string option with ='
+cp /dev/null EXPECTED
+notmuch dump --output=foo.txt '*' >& OUTPUT
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest 'string option with :'
+cp /dev/null EXPECTED
+notmuch dump --output:foo.txt '*' >& OUTPUT
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest 'single keyword option with space'
+cat <<EOF > EXPECTED
+id:msg-001@notmuch-test-suite
+EOF
+notmuch search --output messages '*' >& OUTPUT
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest 'single keyword option with ='
+cat <<EOF > EXPECTED
+id:msg-001@notmuch-test-suite
+EOF
+notmuch search --output=messages '*' >& OUTPUT
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest 'single keyword option with :'
+cat <<EOF > EXPECTED
+id:msg-001@notmuch-test-suite
+EOF
+notmuch search --output:messages '*' >& OUTPUT
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest 'multiple keyword options with space'
+cat <<EOF > EXPECTED
+["msg-001@notmuch-test-suite"]
+EOF
+notmuch search --output messages --format json '*' >& OUTPUT
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest 'multiple keyword options with ='
+cat <<EOF > EXPECTED
+["msg-001@notmuch-test-suite"]
+EOF
+notmuch search --output=messages --format=json '*' >& OUTPUT
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest 'mixed space and = delimiters'
+cat <<EOF > EXPECTED
+["msg-001@notmuch-test-suite"]
+EOF
+notmuch search --output messages --format=json '*' >& OUTPUT
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest 'mixed space and : delimiters'
+cat <<EOF > EXPECTED
+["msg-001@notmuch-test-suite"]
+EOF
+notmuch search --output:messages --format json '*' >& OUTPUT
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest 'show --entire-thread'
+test_expect_success 'notmuch show --entire-thread tag:test > /dev/null'
+
+test_begin_subtest 'show --exclude'
+test_expect_success 'notmuch show --exclude tag:test > /dev/null'
+
 test_done