diff mbox series

[v9,3/5] bugreport: gather git version and build info

Message ID 20200302230400.107428-4-emilyshaffer@google.com (mailing list archive)
State New, archived
Headers show
Series add git-bugreport tool | expand

Commit Message

Emily Shaffer March 2, 2020, 11:03 p.m. UTC
Knowing which version of Git a user has and how it was built allows us
to more precisely pin down the circumstances when a certain issue
occurs, so teach bugreport how to tell us the same output as 'git
version --build-options'.

It's not ideal to directly call 'git version --build-options' because
that output goes to stdout. Instead, wrap the version string in a helper
within help.[ch] library, and call that helper from within the bugreport
library.

Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
---
 Documentation/git-bugreport.txt |  4 +++
 bugreport.c                     | 19 +++++++++++++-
 help.c                          | 46 ++++++++++++++++++++-------------
 help.h                          |  1 +
 4 files changed, 51 insertions(+), 19 deletions(-)

Comments

Junio C Hamano March 23, 2020, 9:20 p.m. UTC | #1
Emily Shaffer <emilyshaffer@google.com> writes:

> +The following information is captured automatically:
> +
> + - 'git version --build-options'

Good.  

Do make sure to give us the same information as if the end user
typed that command from the command line.  There may be more than
one directory on $PATH that has "git" in it; we want to see the one
that is giving trouble to the end user, not necessarily the one that
came from the same source as running "git bugreport" was compiled
from, so it is a good idea not to rely on the contents of static
git_version_string[] array that came in libgit.a that the bugreport
tool happened to be linked with.
   
It may not be in the scope of this step, but we'd want to see
versions of executables for the python interpreter (2vs3), the
tcl/tk interpreter (i.e. wish), the shell (i.e. bash, dash, etc.).

In addition to them, we would want to see versions of some of our
own binaries (i.e. "git", and transports that are separate
executable files).  It would lead to a confusing diagnositic session
if the end-user's PATH has /usr/bin and then $HOME/bin, and the
end-user has a newer version of "git" with "bugreport" only in
$HOME/bin.  The user may think s/he is using the latest
self-compiled "git", and "bugreport" might even agree if it trusts
anything determined when "bugreport" was compiled, but in reality
the version of "git" used largely was coming from "/usr/bin" except
for any new subcommands, or something silly like that, and asking
the environment just like the end user does is the only way to make
sure we are getting the true piture.

Thanks.
diff mbox series

Patch

diff --git a/Documentation/git-bugreport.txt b/Documentation/git-bugreport.txt
index 1f9fde5cde..f44ae8cbe7 100644
--- a/Documentation/git-bugreport.txt
+++ b/Documentation/git-bugreport.txt
@@ -23,6 +23,10 @@  The following information is requested from the user:
  - Expected behavior
  - Actual behavior
 
+The following information is captured automatically:
+
+ - 'git version --build-options'
+
 This tool is invoked via the typical Git setup process, which means that in some
 cases, it might not be able to launch - for example, if a relevant config file
 is unreadable. In this kind of scenario, it may be helpful to manually gather
diff --git a/bugreport.c b/bugreport.c
index f473d606f2..c20437dc6a 100644
--- a/bugreport.c
+++ b/bugreport.c
@@ -1,8 +1,17 @@ 
-#include "builtin.h"
+#include "cache.h"
 #include "parse-options.h"
 #include "stdio.h"
 #include "strbuf.h"
 #include "time.h"
+#include "help.h"
+
+static void get_system_info(struct strbuf *sys_info)
+{
+	/* get git version from native cmd */
+	strbuf_addstr(sys_info, _("git version:\n"));
+	get_version_info(sys_info, 1);
+	strbuf_complete_line(sys_info);
+}
 
 static const char * const bugreport_usage[] = {
 	N_("git bugreport [-o|--output-directory <file>] [-s|--suffix <format>]"),
@@ -32,6 +41,11 @@  static int get_bug_template(struct strbuf *template)
 	return 0;
 }
 
+static void get_header(struct strbuf *buf, const char *title)
+{
+	strbuf_addf(buf, "\n\n[%s]\n", title);
+}
+
 int cmd_main(int argc, const char **argv)
 {
 	struct strbuf buffer = STRBUF_INIT;
@@ -79,6 +93,9 @@  int cmd_main(int argc, const char **argv)
 	/* Prepare the report contents */
 	get_bug_template(&buffer);
 
+	get_header(&buffer, _("System Info"));
+	get_system_info(&buffer);
+
 	/* fopen doesn't offer us an O_EXCL alternative, except with glibc. */
 	report = open(report_path.buf, O_CREAT | O_EXCL | O_WRONLY, 0666);
 
diff --git a/help.c b/help.c
index a21487db77..1de9c0d589 100644
--- a/help.c
+++ b/help.c
@@ -622,8 +622,32 @@  const char *help_unknown_cmd(const char *cmd)
 	exit(1);
 }
 
+void get_version_info(struct strbuf *buf, int show_build_options)
+{
+	/*
+	 * The format of this string should be kept stable for compatibility
+	 * with external projects that rely on the output of "git version".
+	 *
+	 * Always show the version, even if other options are given.
+	 */
+	strbuf_addf(buf, "git version %s\n", git_version_string);
+
+	if (show_build_options) {
+		strbuf_addf(buf, "cpu: %s\n", GIT_HOST_CPU);
+		if (git_built_from_commit_string[0])
+			strbuf_addf(buf, "built from commit: %s\n",
+			       git_built_from_commit_string);
+		else
+			strbuf_addstr(buf, "no commit associated with this build\n");
+		strbuf_addf(buf, "sizeof-long: %d\n", (int)sizeof(long));
+		strbuf_addf(buf, "sizeof-size_t: %d\n", (int)sizeof(size_t));
+		/* NEEDSWORK: also save and output GIT-BUILD_OPTIONS? */
+	}
+}
+
 int cmd_version(int argc, const char **argv, const char *prefix)
 {
+	struct strbuf buf = STRBUF_INIT;
 	int build_options = 0;
 	const char * const usage[] = {
 		N_("git version [<options>]"),
@@ -637,25 +661,11 @@  int cmd_version(int argc, const char **argv, const char *prefix)
 
 	argc = parse_options(argc, argv, prefix, options, usage, 0);
 
-	/*
-	 * The format of this string should be kept stable for compatibility
-	 * with external projects that rely on the output of "git version".
-	 *
-	 * Always show the version, even if other options are given.
-	 */
-	printf("git version %s\n", git_version_string);
+	get_version_info(&buf, build_options);
+	printf("%s", buf.buf);
+
+	strbuf_release(&buf);
 
-	if (build_options) {
-		printf("cpu: %s\n", GIT_HOST_CPU);
-		if (git_built_from_commit_string[0])
-			printf("built from commit: %s\n",
-			       git_built_from_commit_string);
-		else
-			printf("no commit associated with this build\n");
-		printf("sizeof-long: %d\n", (int)sizeof(long));
-		printf("sizeof-size_t: %d\n", (int)sizeof(size_t));
-		/* NEEDSWORK: also save and output GIT-BUILD_OPTIONS? */
-	}
 	return 0;
 }
 
diff --git a/help.h b/help.h
index 9071894e8c..500521b908 100644
--- a/help.h
+++ b/help.h
@@ -37,6 +37,7 @@  void add_cmdname(struct cmdnames *cmds, const char *name, int len);
 void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes);
 int is_in_cmdlist(struct cmdnames *cmds, const char *name);
 void list_commands(unsigned int colopts, struct cmdnames *main_cmds, struct cmdnames *other_cmds);
+void get_version_info(struct strbuf *buf, int show_build_options);
 
 /*
  * call this to die(), when it is suspected that the user mistyped a