From: "Sean Allred via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: Sean Allred <code@seanallred.com>, Sean Allred <allred.sean@gmail.com>
Subject: [PATCH v3 1/2] var: do not print usage() with a correct invocation
Date: Sat, 26 Nov 2022 14:17:56 +0000 [thread overview]
Message-ID: <889fdf877a13067ece785c9c694ed17dcde19b32.1669472277.git.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.1434.v3.git.1669472277.gitgitgadget@gmail.com>
From: Sean Allred <allred.sean@gmail.com>
Before, git-var could print usage() even if the command was invoked
correctly with a variable defined in git_vars -- provided that its
read() function returned NULL.
Now, we only print usage() only if it was called with a logical
variable that wasn't defined -- regardless of read().
Since we now know the variable is valid when we call read_var(), we
can avoid printing usage() here (and exiting with code 129) and
instead exit quietly with code 1. While exiting with a different code
can be a breaking change, it's far better than changing the exit
status more generally from 'failure' to 'success'.
Signed-off-by: Sean Allred <allred.sean@gmail.com>
---
Documentation/git-var.txt | 3 ++-
builtin/var.c | 22 +++++++++++++---------
2 files changed, 15 insertions(+), 10 deletions(-)
diff --git a/Documentation/git-var.txt b/Documentation/git-var.txt
index 6aa521fab23..0ab5bfa7d72 100644
--- a/Documentation/git-var.txt
+++ b/Documentation/git-var.txt
@@ -13,7 +13,8 @@ SYNOPSIS
DESCRIPTION
-----------
-Prints a Git logical variable.
+Prints a Git logical variable. Exits with code 1 if the variable has
+no value.
OPTIONS
-------
diff --git a/builtin/var.c b/builtin/var.c
index 491db274292..5cbe32ec890 100644
--- a/builtin/var.c
+++ b/builtin/var.c
@@ -56,18 +56,15 @@ static void list_vars(void)
printf("%s=%s\n", ptr->name, val);
}
-static const char *read_var(const char *var)
+static const struct git_var *get_git_var(const char *var)
{
struct git_var *ptr;
- const char *val;
- val = NULL;
for (ptr = git_vars; ptr->read; ptr++) {
if (strcmp(var, ptr->name) == 0) {
- val = ptr->read(IDENT_STRICT);
- break;
+ return ptr;
}
}
- return val;
+ return NULL;
}
static int show_config(const char *var, const char *value, void *cb)
@@ -81,7 +78,9 @@ static int show_config(const char *var, const char *value, void *cb)
int cmd_var(int argc, const char **argv, const char *prefix)
{
- const char *val = NULL;
+ const struct git_var *git_var;
+ const char *val;
+
if (argc != 2)
usage(var_usage);
@@ -91,10 +90,15 @@ int cmd_var(int argc, const char **argv, const char *prefix)
return 0;
}
git_config(git_default_config, NULL);
- val = read_var(argv[1]);
- if (!val)
+
+ git_var = get_git_var(argv[1]);
+ if (!git_var)
usage(var_usage);
+ val = git_var->read(IDENT_STRICT);
+ if (!val)
+ return 1;
+
printf("%s\n", val);
return 0;
--
gitgitgadget
next prev parent reply other threads:[~2022-11-26 14:18 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-24 20:22 [PATCH 0/3] Improve consistency of git-var Sean Allred via GitGitGadget
2022-11-24 20:22 ` [PATCH 1/3] var: do not print usage() with a correct invocation Sean Allred via GitGitGadget
2022-11-24 20:22 ` [PATCH 2/3] var: remove read_var Sean Allred via GitGitGadget
2022-11-25 5:48 ` Junio C Hamano
2022-11-24 20:22 ` [PATCH 3/3] var: allow GIT_EDITOR to return null Sean Allred via GitGitGadget
2022-11-25 16:52 ` [PATCH v2 0/2] Improve consistency of git-var Sean Allred via GitGitGadget
2022-11-25 16:52 ` [PATCH v2 1/2] var: do not print usage() with a correct invocation Sean Allred via GitGitGadget
2022-11-25 22:45 ` Ævar Arnfjörð Bjarmason
2022-11-26 13:19 ` Sean Allred
2022-11-25 16:52 ` [PATCH v2 2/2] var: allow GIT_EDITOR to return null Sean Allred via GitGitGadget
2022-11-25 22:48 ` Ævar Arnfjörð Bjarmason
2022-11-26 13:54 ` Sean Allred
2022-11-26 14:17 ` [PATCH v3 0/2] Improve consistency of git-var Sean Allred via GitGitGadget
2022-11-26 14:17 ` Sean Allred via GitGitGadget [this message]
2022-11-26 14:17 ` [PATCH v3 2/2] var: allow GIT_EDITOR to return null Sean Allred via GitGitGadget
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