`git config` has long allowed the ability for callers to provide a 'type
specifier', which instructs `git config` to (1) ensure that incoming
values are satisfiable under that type, and (2) that outgoing values are
canonicalized under that type.
In another series, we propose to extend this functionality with
`--type=color` and `--default` to replace `--get-color`.
However, we traditionally use `--color` to mean "colorize this output",
instead of "this value should be treated as a color".
Currently, `git config` does not support this kind of colorization, but
we should be careful to avoid inhabiting this option too soon, so that
`git config` can support `--type=color` (in the traditional sense) in
the future, if that is desired.
In this patch, we support `--type=<int|bool|bool-or-int|...>` in
addition to `--int`, `--bool`, and etc. This allows the aforementioned
upcoming patch to support querying a color value with a default via
`--type=color --default=...`, without squandering `--color`.
Signed-off-by: Taylor Blau <me@xxxxxxxxxxxx>
---
Documentation/git-config.txt | 71 ++++++++++++++++++++----------------
builtin/config.c | 27 ++++++++++++++
t/t1300-repo-config.sh | 18 +++++++++
3 files changed, 84 insertions(+), 32 deletions(-)
diff --git a/Documentation/git-config.txt b/Documentation/git-config.txt
index e09ed5d7d5..a1e3ffe750 100644
--- a/Documentation/git-config.txt
+++ b/Documentation/git-config.txt
@@ -9,13 +9,13 @@ git-config - Get and set repository or global options
SYNOPSIS
--------
[verse]
-'git config' [<file-option>] [type] [--show-origin] [-z|--null] name [value [value_regex]]
-'git config' [<file-option>] [type] --add name value
-'git config' [<file-option>] [type] --replace-all name value [value_regex]
-'git config' [<file-option>] [type] [--show-origin] [-z|--null] --get name [value_regex]
-'git config' [<file-option>] [type] [--show-origin] [-z|--null] --get-all name [value_regex]
-'git config' [<file-option>] [type] [--show-origin] [-z|--null] [--name-only] --get-regexp name_regex [value_regex]
-'git config' [<file-option>] [type] [-z|--null] --get-urlmatch name URL
+'git config' [<file-option>] [--type=<type>] [--show-origin] [-z|--null] name [value [value_regex]]
+'git config' [<file-option>] [--type=<type>] --add name value
+'git config' [<file-option>] [--type=<type>] --replace-all name value [value_regex]
+'git config' [<file-option>] [--type=<type>] [--show-origin] [-z|--null] --get name [value_regex]
+'git config' [<file-option>] [--type=<type>] [--show-origin] [-z|--null] --get-all name [value_regex]
+'git config' [<file-option>] [--type=<type>] [--show-origin] [-z|--null] [--name-only] --get-regexp name_regex [value_regex]
+'git config' [<file-option>] [--type=<type>] [-z|--null] --get-urlmatch name URL
'git config' [<file-option>] --unset name [value_regex]
'git config' [<file-option>] --unset-all name [value_regex]
'git config' [<file-option>] --rename-section old_name new_name
@@ -38,12 +38,10 @@ existing values that match the regexp are updated or unset. If
you want to handle the lines that do *not* match the regex, just
prepend a single exclamation mark in front (see also <<EXAMPLES>>).
-The type specifier can be either `--int` or `--bool`, to make
-'git config' ensure that the variable(s) are of the given type and
-convert the value to the canonical form (simple decimal number for int,
-a "true" or "false" string for bool), or `--path`, which does some
-path expansion (see `--path` below). If no type specifier is passed, no
-checks or transformations are performed on the value.
+The `--type=<type>` option instructs 'git config' to ensure that incoming and
+outgoing values are canonicalize-able under the given <type>. If no
+`--type=<type>` is given, no canonicalization will be performed. Callers may
+unset an existing `--type` specifier with `--no-type`.
When reading, the values are read from the system, global and
repository local configuration files by default, and options
@@ -160,30 +158,39 @@ See also <<FILES>>.
--list::
List all variables set in config file, along with their values.
---bool::
- 'git config' will ensure that the output is "true" or "false"
+--type <type>::
+ 'git config' will ensure that any input or output is valid under the given
+ type constraint(s), and will canonicalize outgoing values in `<type>`'s
+ canonical form.
++
+Valid `<type>`'s include:
++
+- 'bool': canonicalize values as either "true" or "false".
+- 'int': canonicalize values as simple decimal numbers. An optional suffix of
+ 'k', 'm', or 'g' will cause the value to be multiplied by 1024, 1048576, or
+ 1073741824 prior to output.
+- 'bool-or-int': canonicalize according to either 'bool' or 'int', as described
+ above.
+- 'path': canonicalize by adding a leading `~` to the value of `$HOME` and
+ `~user` to the home directory for the specified user. This specifier has no
+ effect when setting the value (but you can use `git config section.variable
+ ~/` from the command line to let your shell do the expansion.)
+- 'expiry-date': canonicalize by converting from a fixed or relative date-string
+ to a timestamp. This specifier has no effect when setting the value.
++
+--bool::
--int::
- 'git config' will ensure that the output is a simple
- decimal number. An optional value suffix of 'k', 'm', or 'g'
- in the config file will cause the value to be multiplied
- by 1024, 1048576, or 1073741824 prior to output.
-
--bool-or-int::
- 'git config' will ensure that the output matches the format of
- either --bool or --int, as described above.
-
--path::
- `git config` will expand a leading `~` to the value of
- `$HOME`, and `~user` to the home directory for the
- specified user. This option has no effect when setting the
- value (but you can use `git config section.variable ~/`
- from the command line to let your shell do the expansion).
-
--expiry-date::
- `git config` will ensure that the output is converted from
- a fixed or relative date-string to a timestamp. This option
- has no effect when setting the value.
+ Historical options for selecting a type specifier. Prefer instead `--type`,
+ (see: above).
+
+--no-type::
+ Un-sets the previously set type specifier (if one was previously set). This
+ option requests that 'git config' not canonicalize the retrieved variable.
+ `--no-type` has no effect without `--type=<type>` or `--<type>`.
-z::
--null::
diff --git a/builtin/config.c b/builtin/config.c
index 92fb8d56b1..5c8952a17c 100644
--- a/builtin/config.c
+++ b/builtin/config.c
@@ -61,6 +61,32 @@ static int show_origin;
#define TYPE_PATH 4
#define TYPE_EXPIRY_DATE 5
+static int option_parse_type(const struct option *opt, const char *arg,
+ int unset)
+{
+ int *type = opt->value;
+
+ if (unset) {
+ *type = 0;
+ return 0;
+ }
+
+ if (!strcmp(arg, "bool"))
+ *type = TYPE_BOOL;
+ else if (!strcmp(arg, "int"))
+ *type = TYPE_INT;
+ else if (!strcmp(arg, "bool-or-int"))
+ *type = TYPE_BOOL_OR_INT;
+ else if (!strcmp(arg, "path"))
+ *type = TYPE_PATH;
+ else if (!strcmp(arg, "expiry-date"))
+ *type = TYPE_EXPIRY_DATE;
+ else
+ die(_("unrecognized --type argument, %s"), arg);
+
+ return 0;
+}
+
static struct option builtin_config_options[] = {
OPT_GROUP(N_("Config file location")),
OPT_BOOL(0, "global", &use_global_config, N_("use global config file")),
@@ -84,6 +110,7 @@ static struct option builtin_config_options[] = {
OPT_BIT(0, "get-color", &actions, N_("find the color configured: slot [default]"), ACTION_GET_COLOR),
OPT_BIT(0, "get-colorbool", &actions, N_("find the color setting: slot [stdout-is-tty]"), ACTION_GET_COLORBOOL),
OPT_GROUP(N_("Type")),
+ OPT_CALLBACK('t', "type", &type, N_("type"), N_("value is given this type"), option_parse_type),
OPT_SET_INT(0, "bool", &type, N_("value is \"true\" or \"false\""), TYPE_BOOL),
OPT_SET_INT(0, "int", &type, N_("value is decimal number"), TYPE_INT),
OPT_SET_INT(0, "bool-or-int", &type, N_("value is --bool or --int"), TYPE_BOOL_OR_INT),
diff --git a/t/t1300-repo-config.sh b/t/t1300-repo-config.sh
index 24de37d544..f5ae80e9ae 100755
--- a/t/t1300-repo-config.sh
+++ b/t/t1300-repo-config.sh
@@ -1613,6 +1613,7 @@ test_expect_success '--local requires a repo' '
cat >.git/config <<-\EOF &&
[core]
+foo = true
number = 10
EOF
@@ -1622,4 +1623,21 @@ test_expect_success 'later legacy specifiers are given precedence' '
test_cmp expect actual
'
+test_expect_success '--type allows valid type specifiers' '
+ echo "true" >expect &&
+ git config --type=bool core.foo >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success '--no-type unsets type specifiers' '
+ echo "10" >expect &&
+ git config --type=bool --no-type core.number >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success '--type rejects unknown specifiers' '
+ test_must_fail git config --type=nonsense core.foo 2>error &&
+ test_i18ngrep "unrecognized --type argument" error
+'
+
test_done
--
2.17.0
