ci: use explicit trezor.log location

ci/test.yml

@@ -46,16 +46,15 @@ core unix device ui test:
   script:
     - cd core
     - pipenv run make test_emu_ui
-    - cp /var/tmp/trezor.log ${CI_PROJECT_DIR}
     - cd ../ci
     - pipenv run python prepare_ui_artifacts.py
   artifacts:
     name: core-unix-device-ui-test
     paths:
-      - trezor.log
       - ci/ui_test_records/
       - tests/ui_tests/reports/
       - tests/junit.xml
+      - tests/trezor.log
     when: always
     expire_in: 1 week
     reports:
@@ -71,14 +70,13 @@ core unix device test:
   script:
     - cd core
     - pipenv run make test_emu
-    - cp /var/tmp/trezor.log ${CI_PROJECT_DIR}
     - sync
     - sleep 1
     - mv ./src/.coverage .coverage.test_emu
   artifacts:
     name: core-unix-device-test
     paths:
-      - trezor.log
+      - tests/trezor.log
       - tests/junit.xml
       - core/.coverage.*
     expire_in: 1 week
@@ -97,11 +95,10 @@ core unix btconly device test:
   script:
     - cd core
     - pipenv run make test_emu
-    - cp /var/tmp/trezor.log ${CI_PROJECT_DIR}
   artifacts:
     name: core-unix-btconly-device-test
     paths:
-      - trezor.log
+      - tests/trezor.log
       - tests/junit.xml
     expire_in: 1 week
     when: always
@@ -118,14 +115,13 @@ core unix monero test:
   script:
     - cd core
     - pipenv run make test_emu_monero
-    - cp /var/tmp/trezor.log ${CI_PROJECT_DIR}
     - sync
     - sleep 1
     - mv ./src/.coverage .coverage.test_emu_monero
   artifacts:
     name: core-unix-monero-test
     paths:
-      - trezor.log
+      - tests/trezor.log
       - core/.coverage.*
     expire_in: 1 week
     when: always
@@ -141,14 +137,13 @@ core unix u2f test:
     - make -C tests/fido_tests/u2f-tests-hid
     - cd core
     - pipenv run make test_emu_u2f
-    - cp /var/tmp/trezor.log ${CI_PROJECT_DIR}
     - sync
     - sleep 1
     - mv ./src/.coverage .coverage.test_emu_u2f
   artifacts:
     name: core-unix-u2f-test
     paths:
-      - trezor.log
+      - tests/trezor.log
       - core/.coverage.*
     expire_in: 1 week
     when: always
@@ -163,14 +158,13 @@ core unix fido2 test:
   script:
     - cd core
     - pipenv run make test_emu_fido2
-    - cp /var/tmp/trezor.log ${CI_PROJECT_DIR}
     - sync
     - sleep 1
     - mv ./src/.coverage .coverage.test_emu_fido2
   artifacts:
     name: core-unix-fido2-test
     paths:
-      - trezor.log
+      - tests/trezor.log
       - tests/junit.xml
       - core/.coverage.*
     expire_in: 1 week
@@ -186,11 +180,10 @@ core unix click test:
   script:
     - cd core
     - pipenv run make test_emu_click
-    - cp /var/tmp/trezor.log ${CI_PROJECT_DIR}
   artifacts:
     name: core-unix-click-test
     paths:
-      - trezor.log
+      - tests/trezor.log
       - tests/junit.xml
     reports:
       junit: tests/junit.xml

core/Makefile

@@ -38,11 +38,13 @@ FIRMWARE_MAXSIZE    = 1703936
 GITREV=$(shell git describe --always --dirty | tr '-' '_')
 CFLAGS += -DGITREV=$(GITREV)
 
+TESTPATH = $(CURDIR)/../tests
+
 EMU = $(CURDIR)/emu.py
-EMU_TEST_ARGS = --disable-animation --headless --quiet --temporary-profile
+EMU_LOG_FILE ?= $(TESTPATH)/trezor.log
+EMU_TEST_ARGS = --disable-animation --headless --output=$(EMU_LOG_FILE) --temporary-profile
 EMU_TEST = $(EMU) $(EMU_TEST_ARGS) -c
 
-TESTPATH = $(CURDIR)/../tests
 JUNIT_XML ?= $(TESTPATH)/junit.xml
 PYTEST = pytest --junitxml=$(JUNIT_XML)
 TREZOR_FIDO2_UDP_PORT = 21326

core/tests/run_tests_device_emu_monero.sh

@@ -10,7 +10,11 @@ upy_pid=""
 
 # run emulator if RUN_TEST_EMU
 if [[ $RUN_TEST_EMU > 0 ]]; then
-  ../emu.py --disable-animation --temporary-profile --quiet --headless &
+  ../emu.py \
+    --disable-animation \
+    --temporary-profile \
+    --headless \
+    --output=../../tests/trezor.log &
   upy_pid=$!
   trezorctl -v wait-for-emulator
 fi

docs/core/emulator/index.md

@@ -59,8 +59,7 @@ To use the "all all all" seed defined in [SLIP-14](https://github.com/satoshilab
 
 Internal Trezor's storage is emulated and stored in the `/var/tmp/trezor.flash` file on
 default. Deleting this file is similar to calling _wipe device_. You can also find
-`/var/tmp/trezor.sdcard` for SD card and `/var/tmp/trezor.log`, which contains the
-communication log, the same as is in the emulator's stdout.
+`/var/tmp/trezor.sdcard` for SD card.
 
 You can specify a different location for the storage and log files via the `-p` /
 `--profile` option:
@@ -81,6 +80,12 @@ You can also set a full profile path to `TREZOR_PROFILE_DIR` environment variabl
 Specifying `-t` / `--temporary-profile` will start the emulator in a clean temporary
 profile that will be erased when the emulator stops. This is useful, e.g., for tests.
 
+### Logging
+
+By default, emulator output goes to stdout. When silenced with `--quiet`, it is
+redirected to `${TREZOR_PROFILE_DIR}/trezor.log`. You can specify an alternate output
+file with `--output`.
+
 ### Running subcommands with the emulator
 
 In scripts, it is often necessary to start the emulator, run a commmand while it is