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-rw-r--r--doc/guix.texi6
-rw-r--r--nix/nix-daemon/guix-daemon.cc15
2 files changed, 21 insertions, 0 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index e0235b9590..29cea5cef8 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -864,6 +864,12 @@ Allow at most @var{n} build jobs in parallel. The default value is
locally; instead, the daemon will offload builds (@pxref{Daemon Offload
Setup}), or simply fail.
+@item --rounds=@var{N}
+Build each derivation @var{n} times in a row, and raise an error if
+consecutive build results are not bit-for-bit identical. Note that this
+setting can be overridden by clients such as @command{guix build}
+(@pxref{Invoking guix build}).
+
@item --debug
Produce debugging output.
diff --git a/nix/nix-daemon/guix-daemon.cc b/nix/nix-daemon/guix-daemon.cc
index 1934487d24..20a0732fcb 100644
--- a/nix/nix-daemon/guix-daemon.cc
+++ b/nix/nix-daemon/guix-daemon.cc
@@ -80,6 +80,7 @@ builds derivations on behalf of its clients.");
#define GUIX_OPT_NO_BUILD_HOOK 14
#define GUIX_OPT_GC_KEEP_OUTPUTS 15
#define GUIX_OPT_GC_KEEP_DERIVATIONS 16
+#define GUIX_OPT_BUILD_ROUNDS 17
static const struct argp_option options[] =
{
@@ -104,6 +105,8 @@ static const struct argp_option options[] =
n_("do not use the 'build hook'") },
{ "cache-failures", GUIX_OPT_CACHE_FAILURES, 0, 0,
n_("cache build failures") },
+ { "rounds", GUIX_OPT_BUILD_ROUNDS, "N", 0,
+ n_("build each derivation N times in a row") },
{ "lose-logs", GUIX_OPT_LOSE_LOGS, 0, 0,
n_("do not keep build logs") },
{ "disable-log-compression", GUIX_OPT_DISABLE_LOG_COMPRESSION, 0, 0,
@@ -189,6 +192,18 @@ parse_opt (int key, char *arg, struct argp_state *state)
case GUIX_OPT_CACHE_FAILURES:
settings.cacheFailure = true;
break;
+ case GUIX_OPT_BUILD_ROUNDS:
+ {
+ char *end;
+ unsigned long n = strtoul (arg, &end, 10);
+ if (end != arg + strlen (arg))
+ {
+ fprintf (stderr, _("error: %s: invalid number of rounds\n"), arg);
+ exit (EXIT_FAILURE);
+ }
+ settings.set ("build-repeat", std::to_string (std::max (0UL, n - 1)));
+ break;
+ }
case GUIX_OPT_IMPERSONATE_LINUX_26:
settings.impersonateLinux26 = true;
break;