Merge #18581: ci: Print ccache stats, add pip cache, and cleanups

73f83036298e4932772704b2d5359c78d81bd7cc ci: Add pip cache (Hennadii Stepanov)
6d480667b24dc630e7c3fe7ff032cbe1a958ab77 ci: Print ccache statistics summary (Hennadii Stepanov)
a6eea715ff549febe6d4bd52f17acb50abd99120 ci: Drop unused WINEDEBUG variable (Hennadii Stepanov)

Pull request description:

  The Travis [pip cache](https://docs.travis-ci.com/user/caching/#pip-cache) is free and saves a dozen of seconds :)

  Here are some excerpts from the Travis logs with `ccache` statistics (I found useful):

  2) [Arm64](https://travis-ci.org/github/bitcoin/bitcoin/jobs/673507749)
  ```
  ccache version 3.6
  cache directory                     /home/travis/build/bitcoin/bitcoin/ci/scratch/.ccache
  primary config                      /home/travis/build/bitcoin/bitcoin/ci/scratch/.ccache/ccache.conf
  secondary config      (readonly)    /etc/ccache.conf
  stats updated                       Fri Apr 10 18:21:06 2020
  stats zeroed                        Fri Apr 10 18:03:04 2020
  cache hit (direct)                   156
  cache hit (preprocessed)             198
  cache miss                           143
  cache hit rate                     71.23 %
  called for link                        8
  cleanups performed                     9
  files in cache                      1255
  cache size                          80.6 MB
  max cache size                     100.0 MB
  ```
  3) [s390x](https://travis-ci.org/github/bitcoin/bitcoin/jobs/673507750)
  ```
  ccache version 3.4.1
  cache directory                     /home/travis/build/bitcoin/bitcoin/ci/scratch/.ccache
  primary config                      /home/travis/build/bitcoin/bitcoin/ci/scratch/.ccache/ccache.conf
  secondary config      (readonly)    /etc/ccache.conf
  stats zero time                     Fri Apr 10 17:15:35 2020
  cache hit (direct)                   115
  cache hit (preprocessed)             163
  cache miss                            94
  cache hit rate                     74.73 %
  called for link                        6
  cleanups performed                     0
  files in cache                       804
  cache size                         304.8 MB
  max cache size                       5.0 GB
  ```
  4) [Win64](https://travis-ci.org/github/bitcoin/bitcoin/jobs/673507751)
  ```
  ccache version 3.4.1
  cache directory                     /home/travis/build/bitcoin/bitcoin/ci/scratch/.ccache
  primary config                      /home/travis/build/bitcoin/bitcoin/ci/scratch/.ccache/ccache.conf
  secondary config      (readonly)    /etc/ccache.conf
  stats zero time                     Fri Apr 10 17:38:07 2020
  cache hit (direct)                   147
  cache hit (preprocessed)             199
  cache miss                           138
  cache hit rate                     71.49 %
  called for link                        7
  cleanups performed                     7
  files in cache                      1242
  cache size                          87.0 MB
  max cache size                     100.0 MB
  ```
  5) [CentOS 7](https://travis-ci.org/github/bitcoin/bitcoin/jobs/673507752)
  ```
  ccache version 3.7.7
  cache directory                     /home/travis/build/bitcoin/bitcoin/ci/scratch/.ccache
  primary config                      /home/travis/build/bitcoin/bitcoin/ci/scratch/.ccache/ccache.conf
  secondary config      (readonly)    /etc/ccache.conf
  stats updated                       Fri Apr 10 17:45:59 2020
  stats zeroed                        Fri Apr 10 17:34:27 2020
  cache hit (direct)                   152
  cache hit (preprocessed)             200
  cache miss                           144
  cache hit rate                     70.97 %
  called for link                        8
  cleanups performed                     4
  files in cache                      1352
  cache size                          86.1 MB
  max cache size                     100.0 MB
  ```
  6) [bionic](https://travis-ci.org/github/bitcoin/bitcoin/jobs/673507753)
  ```
  ccache version 3.4.1
  cache directory                     /home/travis/build/bitcoin/bitcoin/ci/scratch/.ccache
  primary config                      /home/travis/build/bitcoin/bitcoin/ci/scratch/.ccache/ccache.conf
  secondary config      (readonly)    /etc/ccache.conf
  stats zero time                     Fri Apr 10 17:21:10 2020
  cache hit (direct)                   136
  cache hit (preprocessed)              35
  cache miss                           330
  cache hit rate                     34.13 %
  called for link                        8
  cleanups performed                    18
  files in cache                      1302
  cache size                          83.8 MB
  max cache size                     100.0 MB
  ```
  7) [xenial](https://travis-ci.org/github/bitcoin/bitcoin/jobs/673507754)
  ```
  ccache version 3.2.4
  cache directory                     /home/travis/build/bitcoin/bitcoin/ci/scratch/.ccache
  primary config                      /home/travis/build/bitcoin/bitcoin/ci/scratch/.ccache/ccache.conf
  secondary config      (readonly)    /etc/ccache.conf
  cache hit (direct)                   161
  cache hit (preprocessed)             174
  cache miss                            95
  called for link                        7
  files in cache                      3411
  cache size                           1.1 GB
  max cache size                       5.0 GB
  ```
  10) [focal](https://travis-ci.org/github/bitcoin/bitcoin/jobs/673507757)
  ```
  ccache version 3.7.7
  cache directory                     /home/travis/build/bitcoin/bitcoin/ci/scratch/.ccache
  primary config                      /home/travis/build/bitcoin/bitcoin/ci/scratch/.ccache/ccache.conf
  secondary config      (readonly)    /etc/ccache.conf
  stats updated                       Fri Apr 10 17:35:57 2020
  stats zeroed                        Fri Apr 10 17:21:32 2020
  cache hit (direct)                    78
  cache hit (preprocessed)             125
  cache miss                           107
  cache hit rate                     65.48 %
  called for link                      120
  cleanups performed                     0
  files in cache                      6218
  cache size                           1.8 GB
  max cache size                       5.0 GB
  ```
  14) [macOS 10.12](https://travis-ci.org/github/bitcoin/bitcoin/jobs/673507761)
  ```
  ccache version 3.4.1
  cache directory                     /home/travis/build/bitcoin/bitcoin/ci/scratch/.ccache
  primary config                      /home/travis/build/bitcoin/bitcoin/ci/scratch/.ccache/ccache.conf
  secondary config      (readonly)    /etc/ccache.conf
  stats zero time                     Fri Apr 10 17:47:19 2020
  cache hit (direct)                    28
  cache hit (preprocessed)               1
  cache miss                           469
  cache hit rate                      5.82 %
  called for link                        8
  cleanups performed                    17
  files in cache                      1946
  cache size                          82.6 MB
  max cache size                     100.0 MB
  ```
  15) [macOS 10.14 native](https://travis-ci.org/github/bitcoin/bitcoin/jobs/673507762)
  ```
  ccache version 3.7.8
  cache directory                     /Users/travis/build/bitcoin/bitcoin/ci/scratch/.ccache
  primary config                      /Users/travis/build/bitcoin/bitcoin/ci/scratch/.ccache/ccache.conf
  secondary config      (readonly)    /usr/local/Cellar/ccache/3.7.8/etc/ccache.conf
  stats updated                       Fri Apr 10 17:38:44 2020
  stats zeroed                        Fri Apr 10 17:22:36 2020
  cache hit (direct)                   213
  cache hit (preprocessed)             293
  cache miss                           144
  cache hit rate                     77.85 %
  called for link                       11
  called for preprocessing              56
  compile failed                        30
  preprocessor error                    56
  bad compiler arguments                14
  autoconf compile/link                 77
  no input file                         66
  cleanups performed                     0
  files in cache                      1564
  cache size                         284.6 MB
  max cache size                       5.0 GB
  ```

Top commit has no ACKs.

Tree-SHA512: f9f2c6d72680bafc7a982efc04dc37ab9bba77ffd2a4cbbc56bb0e86c5c3501d57aa2f0ebeac0113e9d8daac1ee4eac1eddf74c1172c267b37ee2d9324366c8a

4 files changed, 8 insertions, 4 deletions

diff --git a/.travis.yml b/.travis.yml
index d66a66ef0c..ea589b4059 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -71,7 +71,7 @@ jobs:
     - stage: lint
       name: 'lint'
       env:
-      cache: false
+      cache: pip
       language: python
       python: '3.5' # Oldest supported version according to doc/dependencies.md
       install:
diff --git a/ci/test/00_setup_env.sh b/ci/test/00_setup_env.sh
index 4c22e4e6c5..7c5f2bf66d 100755
--- a/ci/test/00_setup_env.sh
+++ b/ci/test/00_setup_env.sh
@@ -24,7 +24,7 @@ echo "Fallback to default values in env (if not yet set)"
 export MAKEJOBS=${MAKEJOBS:--j4}
 # A folder for the ci system to put temporary files (ccache, datadirs for tests, ...)
 # This folder only exists on the ci host.
-export BASE_SCRATCH_DIR=${BASE_SCRATCH_DIR:-$BASE_ROOT_DIR/ci/scratch/}
+export BASE_SCRATCH_DIR=${BASE_SCRATCH_DIR:-$BASE_ROOT_DIR/ci/scratch}
 # What host to compile for. See also ./depends/README.md
 # Tests that need cross-compilation export the appropriate HOST.
 # Tests that run natively guess the host
@@ -53,7 +53,6 @@ export DEPENDS_DIR=${DEPENDS_DIR:-$BASE_ROOT_DIR/depends}
 export BASE_OUTDIR=${BASE_OUTDIR:-$BASE_SCRATCH_DIR/out/$HOST}
 export PREVIOUS_RELEASES_DIR=${PREVIOUS_RELEASES_DIR:-$BASE_ROOT_DIR/releases/$HOST}
 export SDK_URL=${SDK_URL:-https://bitcoincore.org/depends-sources/sdks}
-export WINEDEBUG=${WINEDEBUG:-fixme-all}
 export DOCKER_PACKAGES=${DOCKER_PACKAGES:-build-essential libtool autotools-dev automake pkg-config bsdmainutils curl ca-certificates ccache python3 rsync git procps}
 export GOAL=${GOAL:-install}
 export DIR_QA_ASSETS=${DIR_QA_ASSETS:-${BASE_SCRATCH_DIR}/qa-assets}
diff --git a/ci/test/04_install.sh b/ci/test/04_install.sh
index 3cfaf77fde..32eaaf15bb 100755
--- a/ci/test/04_install.sh
+++ b/ci/test/04_install.sh
@@ -26,7 +26,7 @@ export ASAN_OPTIONS="detect_stack_use_after_return=1:check_initialization_order=
 export LSAN_OPTIONS="suppressions=${BASE_ROOT_DIR}/test/sanitizer_suppressions/lsan"
 export TSAN_OPTIONS="suppressions=${BASE_ROOT_DIR}/test/sanitizer_suppressions/tsan:log_path=${BASE_SCRATCH_DIR}/sanitizer-output/tsan"
 export UBSAN_OPTIONS="suppressions=${BASE_ROOT_DIR}/test/sanitizer_suppressions/ubsan:print_stacktrace=1:halt_on_error=1:report_error_type=1"
-env | grep -E '^(BITCOIN_CONFIG|BASE_|QEMU_|CCACHE_|WINEDEBUG|LC_ALL|BOOST_TEST_RANDOM|CONFIG_SHELL|(ASAN|LSAN|TSAN|UBSAN)_OPTIONS|TEST_PREVIOUS_RELEASES|PREVIOUS_RELEASES_DIR)' | tee /tmp/env
+env | grep -E '^(BITCOIN_CONFIG|BASE_|QEMU_|CCACHE_|LC_ALL|BOOST_TEST_RANDOM|CONFIG_SHELL|(ASAN|LSAN|TSAN|UBSAN)_OPTIONS|TEST_PREVIOUS_RELEASES|PREVIOUS_RELEASES_DIR)' | tee /tmp/env
 if [[ $HOST = *-mingw32 ]]; then
   DOCKER_ADMIN="--cap-add SYS_ADMIN"
 elif [[ $BITCOIN_CONFIG = *--with-sanitizers=*address* ]]; then # If ran with (ASan + LSan), Docker needs access to ptrace (https://github.com/google/sanitizers/issues/764)
diff --git a/ci/test/06_script_a.sh b/ci/test/06_script_a.sh
index b6043cd61e..8d77b5408a 100755
--- a/ci/test/06_script_a.sh
+++ b/ci/test/06_script_a.sh
@@ -7,6 +7,7 @@
 export LC_ALL=C.UTF-8
 
 BITCOIN_CONFIG_ALL="--disable-dependency-tracking --prefix=$DEPENDS_DIR/$HOST --bindir=$BASE_OUTDIR/bin --libdir=$BASE_OUTDIR/lib"
+DOCKER_EXEC "command -v ccache > /dev/null && ccache --zero-stats"
 if [ -z "$NO_DEPENDS" ]; then
   DOCKER_EXEC ccache --max-size=$CCACHE_SIZE
 fi
@@ -44,3 +45,7 @@ trap 'DOCKER_EXEC "cat ${BASE_SCRATCH_DIR}/sanitizer-output/* 2> /dev/null"' ERR
 BEGIN_FOLD build
 DOCKER_EXEC make $MAKEJOBS $GOAL || ( echo "Build failure. Verbose build follows." && DOCKER_EXEC make $GOAL V=1 ; false )
 END_FOLD
+
+BEGIN_FOLD ccache_stats
+DOCKER_EXEC "command -v ccache > /dev/null && ccache --version | head -n 1 && ccache --show-stats"
+END_FOLD