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Subject[PATCH RFC] kconfig: place git SHA1 in .config output if in git tree
This patch appends the SHA1 hash of the current git tree to the
kernel version line, or "[Not git tree]" if run from a non-git tree.
Uses "git log" to print the hash.

Suggested-by: Ingo Molnar <mingo@elte.hu>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---

confdata.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index c4dec80..4bd7842 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -399,10 +399,11 @@ int conf_read(const char *name)
int conf_write(const char *name)
{
FILE *out;
+ FILE *git;
struct symbol *sym;
struct menu *menu;
const char *basename;
- char dirname[128], tmpname[128], newname[128];
+ char dirname[128], tmpname[128], newname[128], gitsha[128];
int type, l;
const char *str;
time_t now;
@@ -450,12 +451,20 @@ int conf_write(const char *name)
if (env && *env)
use_timestamp = 0;

+ gitsha[0] = '\0';
+ git = popen("git log --pretty=format:%h -1 2> /dev/null", "r");
+ if (git != NULL) {
+ fscanf(git, " %127s ", gitsha);
+ pclose(git);
+ }
+
fprintf(out, _("#\n"
"# Automatically generated make config: don't edit\n"
- "# Linux kernel version: %s\n"
+ "# Linux kernel version: %s %s\n"
"%s%s"
"#\n"),
sym_get_string_value(sym),
+ gitsha[0] == '\0' ? "[Not git tree]" : gitsha,
use_timestamp ? "# " : "",
use_timestamp ? ctime(&now) : "");


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