make: print spinning icon while flashing/resetting

Makefile.include

@@ -709,10 +709,13 @@ distclean:
 	-@for i in $(USEPKG) ; do "$(MAKE)" -C $(RIOTPKG)/$$i distclean ; done
 	-@rm -rf $(BINDIRBASE)
 
+# Include PROGRAMMER_FLASH/PROGRAMMER_RESET variables
+include $(RIOTMAKE)/tools/programmer.inc.mk
+
 # Define flash-recipe with a default value
 define default-flash-recipe
   $(call check_cmd,$(FLASHER),Flash program)
-  $(FLASHER) $(FFLAGS)
+  $(PROGRAMMER_FLASH)
 endef
 flash-recipe ?= $(default-flash-recipe)
 
@@ -774,7 +777,7 @@ endif
 
 reset:
 	$(call check_cmd,$(RESET),Reset program)
-	$(RESET) $(RESET_FLAGS)
+	$(PROGRAMMER_RESET)
 
 # tests related targets and variables
 include $(RIOTMAKE)/tests/tests.inc.mk

dist/testbed-support/makefile.iotlab.single.inc.mk

@@ -172,17 +172,14 @@ info-iotlab-node:
 
 # Configure FLASHER, RESET, TERMPROG depending on BOARD and if on frontend
 
-# Command to check if 'stdin' is 0. Cannot use 'cmp - <(echo 0)' without bash shell
-_STDIN_EQ_0 = grep 0
-
 ifneq (iotlab-a8-m3,$(BOARD))
 
   # M3 nodes
   FLASHER     = iotlab-node
   RESET       = iotlab-node
-  _NODE_FMT   = --jmespath='keys(@)[0]' --format='int'
-  FFLAGS      = $(_NODE_FMT) $(_IOTLAB_EXP_ID) $(_IOTLAB_NODELIST) $(_NODES_FLASH_OPTION) $(FLASHFILE) | $(_STDIN_EQ_0)
-  RESET_FLAGS = $(_NODE_FMT) $(_IOTLAB_EXP_ID) $(_IOTLAB_NODELIST) --reset | $(_STDIN_EQ_0)
+  _NODE_FMT   = --jmespath='keys(@)[0]' --format='lambda ret: exit(int(ret))'
+  FFLAGS      = $(_NODE_FMT) $(_IOTLAB_EXP_ID) $(_IOTLAB_NODELIST) $(_NODES_FLASH_OPTION) $(FLASHFILE)
+  RESET_FLAGS = $(_NODE_FMT) $(_IOTLAB_EXP_ID) $(_IOTLAB_NODELIST) --reset
 
   ifeq (,$(_IOTLAB_ON_FRONTEND))
     TERMPROG  = ssh
@@ -198,8 +195,8 @@ else
   FLASHER     = iotlab-ssh
   RESET       = iotlab-ssh
   _NODE_FMT   = --jmespath='keys(values(@)[0])[0]' --fmt='int'
-  FFLAGS      = $(_NODE_FMT) $(_IOTLAB_EXP_ID) flash-m3 $(_IOTLAB_NODELIST) $(FLASHFILE) | $(_STDIN_EQ_0)
-  RESET_FLAGS = $(_NODE_FMT) $(_IOTLAB_EXP_ID) reset-m3 $(_IOTLAB_NODELIST) | $(_STDIN_EQ_0)
+  FFLAGS      = $(_NODE_FMT) $(_IOTLAB_EXP_ID) flash-m3 $(_IOTLAB_NODELIST) $(FLASHFILE)
+  RESET_FLAGS = $(_NODE_FMT) $(_IOTLAB_EXP_ID) reset-m3 $(_IOTLAB_NODELIST)
 
   TERMPROG  = ssh
   ifeq (,$(_IOTLAB_ON_FRONTEND))

dist/tools/programmer/programmer.py

@@ -0,0 +1,115 @@
+#!/usr/bin/env python3
+
+# Copyright (C) 2021 Inria
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+
+import sys
+import time
+import shlex
+import subprocess
+import argparse
+
+from contextlib import contextmanager
+
+
+SUCCESS = "\033[32;1m✓\033[0m"
+FAILED = "\033[31;1m×\033[0m"
+SPIN = ["⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"]
+
+
+class Programmer:
+
+    @contextmanager
+    def spawn_process(self):
+        """Yield a subprocess running in background."""
+        kwargs = {} if self.verbose else {
+            "stdout": subprocess.PIPE,
+            "stderr": subprocess.STDOUT
+        }
+        yield subprocess.Popen(shlex.split(self.cmd), **kwargs)
+
+    def spin(self, process):
+        """Print a spinning icon while programmer process is running."""
+        while process.poll() is None:
+            for index in range(len(SPIN)):
+                sys.stdout.write(
+                    "\r \033[36;1m{}\033[0m {} in progress "
+                    "(programmer: '{}')"
+                    .format(SPIN[index], self.action, self.programmer)
+                )
+                sys.stdout.flush()
+                time.sleep(0.1)
+
+    def print_status(self, process, elapsed):
+        """Print status of background programmer process."""
+        print(
+            "\r \u001b[2K{} {} {} (programmer: '{}' - duration: {:0.2f}s)"
+            .format(
+                FAILED if process.returncode != 0 else SUCCESS,
+                self.action,
+                "failed!" if process.returncode != 0 else "done!",
+                self.programmer,
+                elapsed
+            )
+        )
+        # Print content of stdout (which also contain stderr) when the
+        # subprocess failed
+        if process.returncode != 0:
+            print(process.stdout.read().decode())
+        else:
+            print(
+                "(for full programmer output add PROGRAMMER_QUIET=0 or "
+                "QUIET=0 to the make command line)"
+            )
+
+    def run(self):
+        """Run the programmer in a background process."""
+        if not self.cmd.strip():
+            # Do nothing if programmer command is empty
+            return 0
+
+        if self.verbose:
+            print(self.cmd)
+        start = time.time()
+        with self.spawn_process() as proc:
+            try:
+                if self.verbose:
+                    proc.communicate()
+                else:
+                    self.spin(proc)
+            except KeyboardInterrupt:
+                proc.terminate()
+                proc.kill()
+        elapsed = time.time() - start
+        if not self.verbose:
+            # When using the spinning icon, print the programmer status
+            self.print_status(proc, elapsed)
+
+        return proc.returncode
+
+
+def main(parser):
+    """Main function."""
+    programmer = Programmer()
+    parser.parse_args(namespace=programmer)
+    # Return with same return code as subprocess
+    sys.exit(programmer.run())
+
+
+def parser():
+    """Return an argument parser."""
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--action", help="Programmer action")
+    parser.add_argument("--cmd", help="Programmer command")
+    parser.add_argument("--programmer", help="Programmer")
+    parser.add_argument(
+        "--verbose", action='store_true', default=False, help="Verbose output"
+    )
+    return parser
+
+
+if __name__ == "__main__":
+    main(parser())

makefiles/boot/riotboot.mk

@@ -81,7 +81,7 @@ riotboot/bootloader/%: $(BUILDDEPS)
 		QUIET=$(QUIET) PATH="$(PATH)"\
 		EXTERNAL_BOARD_DIRS="$(EXTERNAL_BOARD_DIRS)" BOARD=$(BOARD)\
 		DEBUG_ADAPTER_ID=$(DEBUG_ADAPTER_ID) \
-		PROGRAMMER=$(PROGRAMMER) \
+		PROGRAMMER=$(PROGRAMMER) PROGRAMMER_QUIET=$(PROGRAMMER_QUIET) \
 			$(MAKE) --no-print-directory -C $(RIOTBOOT_DIR) $*
 
 # Generate a binary file from the bootloader which fills all the

makefiles/tools/programmer.inc.mk

@@ -0,0 +1,26 @@
+# Configure the programmer related variables
+
+PROGRAMMER_QUIET ?= $(QUIET)
+ifeq (0,$(PROGRAMMER_QUIET))
+  PROGRAMMER_VERBOSE_OPT ?= --verbose
+endif
+
+# Don't use the programmer wrapper for the CI (where speed and verbose output
+# are important)
+ifneq (1,$(RIOT_CI_BUILD))
+  USE_PROGRAMMER_WRAPPER_SCRIPT ?= 1
+else
+  USE_PROGRAMMER_WRAPPER_SCRIPT ?= 0
+endif
+
+ifeq (1,$(USE_PROGRAMMER_WRAPPER_SCRIPT))
+  PROGRAMMER_FLASH ?= @$(RIOTTOOLS)/programmer/programmer.py \
+    --action Flashing --cmd "$(FLASHER) $(FFLAGS)" \
+    --programmer "$(PROGRAMMER)" $(PROGRAMMER_VERBOSE_OPT)
+  PROGRAMMER_RESET ?= @$(RIOTTOOLS)/programmer/programmer.py \
+  --action Resetting --cmd "$(RESET) $(RESET_FLAGS)" \
+  --programmer "$(PROGRAMMER)" $(PROGRAMMER_VERBOSE_OPT)
+else
+  PROGRAMMER_FLASH ?= $(FLASHER) $(FFLAGS)
+  PROGRAMMER_RESET ?= $(RESET) $(RESET_FLAGS)
+endif

makefiles/vars.inc.mk

@@ -107,6 +107,10 @@ export HEXFILE               # The 'intel hex' stripped result of the compilatio
 # RESET_FLAGS                # The parameters to supply to RESET.
 # PROGRAMMER                 # The programmer to use when flashing, resetting or debugging
 # PROGRAMMERS_SUPPORTED      # The list of programmers supported by a board
+# PROGRAMMER_QUIET           # Change verbosity of programmer output (only used with flash and reset targets).
+                             # Default is 1, not verbose. Use 0 to get normal programmer output.
+# USE_PROGRAMMER_WRAPPER_SCRIPT     # Use the programmer wrapper Python script. Default is 1 (0 if RIOT_CI_BUILD is set).
+
 
 export DLCACHE               # directory used to cache http downloads
 export DOWNLOAD_TO_FILE      # Use `$(DOWNLOAD_TO_FILE) $(DESTINATION) $(URL)` to download `$(URL)` to `$(DESTINATION)`.