Merge bitcoin/bitcoin#19952: build, ci: Add file-based logging for individual packages

86c2889518df0234b8b28112a9771b85c577eefd ci: Make log verbose in error case only (Hennadii Stepanov)
7f650883b71b67cd33026cf49af0b16f01e45541 depends: Add file-based logging for individual packages (Hennadii Stepanov)

Pull request description:

  This PR adds file-based logging for individual packages in depends. To use this feature one should provide `LOG=1`.

  A log file is printed out automatically in case of a build error. After successful build log files are being moved along with package archives:
  ```
  $ make -C depends HOST=x86_64-w64-mingw32 LOG=1
  $ find ./depends/built/x86_64-w64-mingw32 -name '*.log' | sort
  ./depends/built/x86_64-w64-mingw32/bdb/bdb-4.8.30-5100a099801.log
  ./depends/built/x86_64-w64-mingw32/boost/boost-1_71_0-313f82dc7de.log
  ./depends/built/x86_64-w64-mingw32/libevent/libevent-2.1.12-stable-3fa27048d5e.log
  ./depends/built/x86_64-w64-mingw32/libnatpmp/libnatpmp-4536032ae32268a45c073a4d5e91bbab4534773a-9db4850dd32.log
  ./depends/built/x86_64-w64-mingw32/miniupnpc/miniupnpc-2.2.2-75d9a1807e0.log
  ./depends/built/x86_64-w64-mingw32/native_b2/native_b2-1_71_0-3bf253c19bf.log
  ./depends/built/x86_64-w64-mingw32/qrencode/qrencode-3.4.4-dfac87af599.log
  ./depends/built/x86_64-w64-mingw32/qt/qt-5.15.2-9304e03d3ac.log
  ./depends/built/x86_64-w64-mingw32/sqlite/sqlite-3320100-455acafa7be.log
  ./depends/built/x86_64-w64-mingw32/zeromq/zeromq-4.3.1-5ff627ec84a.log
  ```

  An example of CI tasks with package build errors -- https://cirrus-ci.com/task/5275741788045312

  Closes #16368.

ACKs for top commit:
  laanwj:
    Tested ACK 86c2889518df0234b8b28112a9771b85c577eefd

Tree-SHA512: 497f2146fd2e38c952124aecfd80ebb42be22bbc5dc59521491545f4465fc38f23da7787a0caea5686b7c30aa862f2b0c02092ae3fe863e80a5ddd14b3d324b9

4 files changed, 17 insertions, 8 deletions

diff --git a/ci/test/05_before_script.sh b/ci/test/05_before_script.sh
index d8dcb708aa..fc2f76797c 100755
--- a/ci/test/05_before_script.sh
+++ b/ci/test/05_before_script.sh
@@ -45,7 +45,7 @@ if [ -z "$NO_DEPENDS" ]; then
   else
     SHELL_OPTS="CONFIG_SHELL="
   fi
-  CI_EXEC "$SHELL_OPTS" make "$MAKEJOBS" -C depends HOST="$HOST" "$DEP_OPTS"
+  CI_EXEC "$SHELL_OPTS" make "$MAKEJOBS" -C depends HOST="$HOST" "$DEP_OPTS" LOG=1
 fi
 if [ -n "$PREVIOUS_RELEASES_TO_DOWNLOAD" ]; then
   CI_EXEC test/get_previous_releases.py -b -t "$PREVIOUS_RELEASES_DIR" "${PREVIOUS_RELEASES_TO_DOWNLOAD}"
diff --git a/depends/Makefile b/depends/Makefile
index 723509c81d..b901533786 100644
--- a/depends/Makefile
+++ b/depends/Makefile
@@ -271,7 +271,7 @@ clean-all: clean
 	@rm -rf $(SOURCES_PATH) x86_64* i686* mips* arm* aarch64* powerpc* riscv32* riscv64* s390x*
 
 clean:
-	@rm -rf $(WORK_PATH) $(BASE_CACHE) $(BUILD)
+	@rm -rf $(WORK_PATH) $(BASE_CACHE) $(BUILD) *.log
 
 install: check-packages $(host_prefix)/share/config.site
 
diff --git a/depends/README.md b/depends/README.md
index f7647198c6..da2a74e0e7 100644
--- a/depends/README.md
+++ b/depends/README.md
@@ -113,7 +113,10 @@ The following can be set when running make: `make FOO=bar`
 - `BUILD_ID_SALT`: Optional salt to use when generating build package ids
 - `FORCE_USE_SYSTEM_CLANG`: (EXPERTS ONLY) When cross-compiling for macOS, use Clang found in the
   system's `$PATH` rather than the default prebuilt release of Clang
-  from llvm.org. Clang 8 or later is required.
+  from llvm.org. Clang 8 or later is required
+- `LOG`: Use file-based logging for individual packages. During a package build its log file
+  resides in the `depends` directory, and the log file is printed out automatically in case
+  of build error. After successful build log files are moved along with package archives
 
 If some packages are not built, for example `make NO_WALLET=1`, the appropriate
 options will be passed to bitcoin's configure. In this case, `--disable-wallet`.
diff --git a/depends/funcs.mk b/depends/funcs.mk
index cef37544a6..75fa1ed43f 100644
--- a/depends/funcs.mk
+++ b/depends/funcs.mk
@@ -67,6 +67,7 @@ $(1)_cached_checksum:=$(BASE_CACHE)/$(host)/$(1)/$(1)-$($(1)_version)-$($(1)_bui
 $(1)_patch_dir:=$(base_build_dir)/$(host)/$(1)/$($(1)_version)-$($(1)_build_id)/.patches-$($(1)_build_id)
 $(1)_prefixbin:=$($($(1)_type)_prefix)/bin/
 $(1)_cached:=$(BASE_CACHE)/$(host)/$(1)/$(1)-$($(1)_version)-$($(1)_build_id).tar.gz
+$(1)_build_log:=$(BASEDIR)/$(1)-$($(1)_version)-$($(1)_build_id).log
 $(1)_all_sources=$($(1)_file_name) $($(1)_extra_sources)
 
 #stamps
@@ -85,7 +86,7 @@ $(1)_download_path_fixed=$(subst :,\:,$$($(1)_download_path))
 # The default behavior for tar will try to set ownership when running as uid 0 and may not succeed, --no-same-owner disables this behavior
 $(1)_fetch_cmds ?= $(call fetch_file,$(1),$(subst \:,:,$$($(1)_download_path_fixed)),$$($(1)_download_file),$($(1)_file_name),$($(1)_sha256_hash))
 $(1)_extract_cmds ?= mkdir -p $$($(1)_extract_dir) && echo "$$($(1)_sha256_hash)  $$($(1)_source)" > $$($(1)_extract_dir)/.$$($(1)_file_name).hash &&  $(build_SHA256SUM) -c $$($(1)_extract_dir)/.$$($(1)_file_name).hash && $(build_TAR) --no-same-owner --strip-components=1 -xf $$($(1)_source)
-$(1)_preprocess_cmds ?=
+$(1)_preprocess_cmds ?= true
 $(1)_build_cmds ?=
 $(1)_config_cmds ?=
 $(1)_stage_cmds ?=
@@ -187,6 +188,10 @@ endif
 endef
 
 define int_add_cmds
+ifneq ($(LOG),)
+$(1)_logging = >>$$($(1)_build_log) 2>&1 || { if test -f $$($(1)_build_log); then cat $$($(1)_build_log); fi; exit 1; }
+endif
+
 $($(1)_fetched):
 	mkdir -p $$(@D) $(SOURCES_PATH)
 	rm -f $$@
@@ -203,23 +208,23 @@ $($(1)_preprocessed): | $($(1)_extracted)
 	echo Preprocessing $(1)...
 	mkdir -p $$(@D) $($(1)_patch_dir)
 	$(foreach patch,$($(1)_patches),cd $(PATCHES_PATH)/$(1); cp $(patch) $($(1)_patch_dir) ;)
-	cd $$(@D); $($(1)_preprocess_cmds)
+	{ cd $$(@D); $($(1)_preprocess_cmds); } $$($(1)_logging)
 	touch $$@
 $($(1)_configured): | $($(1)_dependencies) $($(1)_preprocessed)
 	echo Configuring $(1)...
 	rm -rf $(host_prefix); mkdir -p $(host_prefix)/lib; cd $(host_prefix); $(foreach package,$($(1)_all_dependencies), $(build_TAR) --no-same-owner -xf $($(package)_cached); )
 	mkdir -p $$(@D)
-	+cd $$(@D); $($(1)_config_env) $($(1)_config_cmds)
+	+{ cd $$(@D); $($(1)_config_env) $($(1)_config_cmds); } $$($(1)_logging)
 	touch $$@
 $($(1)_built): | $($(1)_configured)
 	echo Building $(1)...
 	mkdir -p $$(@D)
-	+cd $$(@D); $($(1)_build_env) $($(1)_build_cmds)
+	+{ cd $$(@D); $($(1)_build_env) $($(1)_build_cmds); } $$($(1)_logging)
 	touch $$@
 $($(1)_staged): | $($(1)_built)
 	echo Staging $(1)...
 	mkdir -p $($(1)_staging_dir)/$(host_prefix)
-	cd $($(1)_build_dir); $($(1)_stage_env) $($(1)_stage_cmds)
+	+{ cd $($(1)_build_dir); $($(1)_stage_env) $($(1)_stage_cmds); } $$($(1)_logging)
 	rm -rf $($(1)_extract_dir)
 	touch $$@
 $($(1)_postprocessed): | $($(1)_staged)
@@ -233,6 +238,7 @@ $($(1)_cached): | $($(1)_dependencies) $($(1)_postprocessed)
 	rm -rf $$(@D) && mkdir -p $$(@D)
 	mv $$($(1)_staging_dir)/$$(@F) $$(@)
 	rm -rf $($(1)_staging_dir)
+	if test -f $($(1)_build_log); then mv $($(1)_build_log) $$(@D); fi
 $($(1)_cached_checksum): $($(1)_cached)
 	cd $$(@D); $(build_SHA256SUM) $$(<F) > $$(@)