[PATCH v2] help: interpret boolean string values for help.autocorrect

["Scott Chacon via GitGitGadget" <gitgitgadget@gmail.com>]

From: Scott Chacon <schacon@gmail.com>

A help.autocorrect value of 1 is currently interpreted as "wait 1
decisecond", which can be confusing to users who believe they are setting a
boolean value to turn the autocorrect feature on.

Interpret the value of help.autocorrect as either one of the accepted list
of special values ("never", "immediate", ...), a boolean or an integer. If
the value is 1, it is no longer interpreted as a decisecond value of 0.1s
but as a true boolean, the equivalent of "immediate". If the value is 2 or
more, continue treating it as a decisecond wait time.

False boolean string values ("off", "false", "no") are now equivalent to 0,
meaning that guessed values are still shown but nothing is executed (as
opposed to "never", which does not show the guesses). True boolean string
values are interpreted as "immediate".

Signed-off-by: Scott Chacon <schacon@gmail.com>
---
    help: interpret help.autocorrect=1 as "immediate" rather than 0.1s
    
    Took Junio's suggestion to include all boolean values as valid, though
    I'm not interpreting "false" as "never", but instead as 0, as they're
    subtly different. 0 will show the guessed commands and exit, "never"
    will not guess the commands.
    
    Changes since v1:
    
     * Include all boolean values rather than special casing "1"
     * Update the help.txt documentation

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-1869%2Fschacon%2Fmaster-v2
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-1869/schacon/master-v2
Pull-Request: https://github.com/git/git/pull/1869

Range-diff vs v1:

 1:  dbda79cd4fc < -:  ----------- help: interpret help.autocorrect=1 as "immediate" rather than 0.1s
 -:  ----------- > 1:  07b47b70ded help: interpret boolean string values for help.autocorrect


 Documentation/config/help.txt |  5 +++--
 help.c                        | 18 +++++++++++++++---
 2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/Documentation/config/help.txt b/Documentation/config/help.txt
index 610701f9a37..6d9c2e06908 100644
--- a/Documentation/config/help.txt
+++ b/Documentation/config/help.txt
@@ -11,8 +11,9 @@ help.autoCorrect::
 	If git detects typos and can identify exactly one valid command similar
 	to the error, git will try to suggest the correct command or even
 	run the suggestion automatically. Possible config values are:
-	 - 0 (default): show the suggested command.
-	 - positive number: run the suggested command after specified
+	 - 0, false boolean string: show the suggested command (default).
+	 - 1, true boolean string: run the suggested command immediately.
+	 - positive number > 1: run the suggested command after specified
 deciseconds (0.1 sec).
 	 - "immediate": run the suggested command immediately.
 	 - "prompt": show the suggestion and prompt for confirmation to run
diff --git a/help.c b/help.c
index 5483ea8fd29..9e0f66c26dc 100644
--- a/help.c
+++ b/help.c
@@ -573,9 +573,21 @@ static int git_unknown_cmd_config(const char *var, const char *value,
 		} else if (!strcmp(value, "prompt")) {
 			cfg->autocorrect = AUTOCORRECT_PROMPT;
 		} else {
-			int v = git_config_int(var, value, ctx->kvi);
-			cfg->autocorrect = (v < 0)
-				? AUTOCORRECT_IMMEDIATELY : v;
+			int is_bool;
+			int v = git_config_bool_or_int(var, value, ctx->kvi, &is_bool);
+			if (is_bool) {
+				if (v == 0) {
+					cfg->autocorrect = 0;
+				} else {
+					cfg->autocorrect = AUTOCORRECT_IMMEDIATELY;
+				}
+			} else {
+				if (v < 0 || v == 1) {
+					cfg->autocorrect = AUTOCORRECT_IMMEDIATELY;
+				} else {
+					cfg->autocorrect = v;
+				}
+			}
 		}
 	}
 	/* Also use aliases for command lookup */

base-commit: 14650065b76b28d3cfa9453356ac5669b19e706e
-- 
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