build: add -dlgo flag in ci.go (ethereum#21824)

This new flag downloads a known version of Go and builds with it. This
is meant for environments where we can't easily upgrade the installed Go
version.

* .travis.yml: remove install step for PR test builders

We added this step originally to avoid re-building everything
for every test. go test has become much smarter in recent go
releases, so we no longer need to install anything here.

.travis.yml

@@ -31,7 +31,6 @@ jobs:
       env:
         - GO111MODULE=on
       script:
-        - go run build/ci.go install
         - go run build/ci.go test -coverage $TEST_PACKAGES
 
     # These are the latest Go versions.
@@ -43,7 +42,6 @@ jobs:
       env:
         - GO111MODULE=on
       script:
-        - go run build/ci.go install
         - go run build/ci.go test -coverage $TEST_PACKAGES
 
     - stage: build
@@ -55,7 +53,6 @@ jobs:
       env:
         - GO111MODULE=on
       script:
-        - go run build/ci.go install
         - go run build/ci.go test -coverage $TEST_PACKAGES
 
     - stage: build
@@ -74,7 +71,6 @@ jobs:
         - ulimit -S -n $NOFILE
         - ulimit -n
         - unset -f cd # workaround for https://github.com/travis-ci/travis-ci/issues/8703
-        - go run build/ci.go install
         - go run build/ci.go test -coverage $TEST_PACKAGES
 
     # This builder does the Ubuntu PPA upload
@@ -99,7 +95,7 @@ jobs:
             - python-paramiko
       script:
         - echo '|1|7SiYPr9xl3uctzovOTj4gMwAC1M=|t6ReES75Bo/PxlOPJ6/GsGbTrM0= ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA0aKz5UTUndYgIGG7dQBV+HaeuEZJ2xPHo2DS2iSKvUL4xNMSAY4UguNW+pX56nAQmZKIZZ8MaEvSj6zMEDiq6HFfn5JcTlM80UwlnyKe8B8p7Nk06PPQLrnmQt5fh0HmEcZx+JU9TZsfCHPnX7MNz4ELfZE6cFsclClrKim3BHUIGq//t93DllB+h4O9LHjEUsQ1Sr63irDLSutkLJD6RXchjROXkNirlcNVHH/jwLWR5RcYilNX7S5bIkK8NlWPjsn/8Ua5O7I9/YoE97PpO6i73DTGLh5H9JN/SITwCKBkgSDWUt61uPK3Y11Gty7o2lWsBjhBUm2Y38CBsoGmBw==' >> ~/.ssh/known_hosts
-        - go run build/ci.go debsrc -goversion 1.15 -upload ethereum/ethereum -sftp-user geth-ci -signer "Go Ethereum Linux Builder <[email protected]>"
+        - go run build/ci.go debsrc -upload ethereum/ethereum -sftp-user geth-ci -signer "Go Ethereum Linux Builder <[email protected]>"
 
     # This builder does the Linux Azure uploads
     - stage: build
@@ -119,22 +115,22 @@ jobs:
             - gcc-multilib
       script:
         # Build for the primary platforms that Trusty can manage
-        - go run build/ci.go install
+        - go run build/ci.go install -dlgo
         - go run build/ci.go archive -type tar -signer LINUX_SIGNING_KEY -upload gethstore/builds
-        - go run build/ci.go install -arch 386
+        - go run build/ci.go install -dlgo -arch 386
         - go run build/ci.go archive -arch 386 -type tar -signer LINUX_SIGNING_KEY -upload gethstore/builds
 
         # Switch over GCC to cross compilation (breaks 386, hence why do it here only)
         - sudo -E apt-get -yq --no-install-suggests --no-install-recommends --force-yes install gcc-arm-linux-gnueabi libc6-dev-armel-cross gcc-arm-linux-gnueabihf libc6-dev-armhf-cross gcc-aarch64-linux-gnu libc6-dev-arm64-cross
         - sudo ln -s /usr/include/asm-generic /usr/include/asm
 
-        - GOARM=5 go run build/ci.go install -arch arm -cc arm-linux-gnueabi-gcc
+        - GOARM=5 go run build/ci.go install -dlgo -arch arm -cc arm-linux-gnueabi-gcc
         - GOARM=5 go run build/ci.go archive -arch arm -type tar -signer LINUX_SIGNING_KEY -upload gethstore/builds
-        - GOARM=6 go run build/ci.go install -arch arm -cc arm-linux-gnueabi-gcc
+        - GOARM=6 go run build/ci.go install -dlgo -arch arm -cc arm-linux-gnueabi-gcc
         - GOARM=6 go run build/ci.go archive -arch arm -type tar -signer LINUX_SIGNING_KEY -upload gethstore/builds
-        - GOARM=7 go run build/ci.go install -arch arm -cc arm-linux-gnueabihf-gcc
+        - GOARM=7 go run build/ci.go install -dlgo -arch arm -cc arm-linux-gnueabihf-gcc
         - GOARM=7 go run build/ci.go archive -arch arm -type tar -signer LINUX_SIGNING_KEY -upload gethstore/builds
-        - go run build/ci.go install -arch arm64 -cc aarch64-linux-gnu-gcc
+        - go run build/ci.go install -dlgo -arch arm64 -cc aarch64-linux-gnu-gcc
         - go run build/ci.go archive -arch arm64 -type tar -signer LINUX_SIGNING_KEY -upload gethstore/builds
 
     # This builder does the Linux Azure MIPS xgo uploads
@@ -219,7 +215,7 @@ jobs:
       git:
         submodules: false # avoid cloning ethereum/tests
       script:
-        - go run build/ci.go install
+        - go run build/ci.go install -dlgo
         - go run build/ci.go archive -type tar -signer OSX_SIGNING_KEY -upload gethstore/builds
 
         # Build the iOS framework and upload it to CocoaPods and Azure

appveyor.yml

@@ -30,7 +30,7 @@ install:
   - gcc --version
 
 build_script:
-  - go run build\ci.go install
+  - go run build\ci.go install -dlgo
 
 after_build:
   - go run build\ci.go archive -type zip -signer WINDOWS_SIGNING_KEY -upload gethstore/builds

build/checksums.txt

@@ -1,6 +1,13 @@
 # This file contains sha256 checksums of optional build dependencies.
 
-69438f7ed4f532154ffaf878f3dfd83747e7a00b70b3556eddabf7aaee28ac3a  go1.15.src.tar.gz
+063da6a9a4186b8118a0e584532c8c94e65582e2cd951ed078bfd595d27d2367  go1.15.4.src.tar.gz
+aaf8c5323e0557211680960a8f51bedf98ab9a368775a687d6cf1f0079232b1d  go1.15.4.darwin-amd64.tar.gz
+6b2f6d8afddfb198bf0e36044084dc4db4cb0be1107375240b34d215aa5ff6ad  go1.15.4.linux-386.tar.gz
+eb61005f0b932c93b424a3a4eaa67d72196c79129d9a3ea8578047683e2c80d5  go1.15.4.linux-amd64.tar.gz
+6f083b453484fc5f95afb345547a58ccc957cde91348b7a7c68f5b060e488c85  go1.15.4.linux-arm64.tar.gz
+fe449ad3e121472e5db2f70becc0fef9d1a7188616c0605ada63f1e3bbad280e  go1.15.4.linux-armv6l.tar.gz
+3be3cfc08ccc7e7056fdee17b6f5d18e9d7f3d1351dcfec8de34b1c95cb05b50  go1.15.4.windows-386.zip
+3593204e3851be577e4209900ece031b36f1e9ce1671f3f3221c9af7a090a941  go1.15.4.windows-amd64.zip
 
 d998a84eea42f2271aca792a7b027ca5c1edfcba229e8e5a844c9ac3f336df35  golangci-lint-1.27.0-linux-armv7.tar.gz
 bf781f05b0d393b4bf0a327d9e62926949a4f14d7774d950c4e009fc766ed1d4  golangci-lint.exe-1.27.0-windows-amd64.zip