Expose build time to package build scriptlets via $RPM_BUILD_TIME

This is useful for consistently setting timestamps within build scriptlets, in particular when doing reproducable builds.
pmatilai · Feb 27, 2024 · 08100d0 · 08100d0
1 parent a478cb8
commit 08100d0
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Showing 2 changed files with 6 additions and 0 deletions.
diff --git a/build/build.c b/build/build.c
@@ -28,6 +28,7 @@ static rpm_time_t getBuildTime(void)
     char *srcdate;
     time_t epoch;
     char *endptr;
+    char *timestr = NULL;
 
     srcdate = getenv("SOURCE_DATE_EPOCH");
     if (srcdate && rpmExpandNumeric("%{?use_source_date_epoch_as_buildtime}")) {
@@ -40,6 +41,10 @@ static rpm_time_t getBuildTime(void)
     } else
         buildTime = (uint32_t) time(NULL);
 
+    rasprintf(&timestr, "%u", buildTime);
+    setenv("RPM_BUILD_TIME", timestr, 1);
+    free(timestr);
+
     return buildTime;
 }
 

diff --git a/docs/manual/spec.md b/docs/manual/spec.md
@@ -485,6 +485,7 @@ RPM_ARCH            | Architecture of the package
 RPM_BUILD_DIR       | The build directory of the package
 RPM_BUILD_NCPUS     | 
 RPM_BUILD_ROOT      | The buildroot directory of the package
+RPM_BUILD_TIME      | The build time of the package
 RPM_DOC_DIR         | The special documentation directory of the package
 RPM_LD_FLAGS        | Linker flags
 RPM_OPT_FLAGS       | Compiler flags