build-script: support CMake install steps.

[jasonmolenda]

Cherry-pick Adrian's fix from master to skip an unnecessary xcodebuild invocation;
should fix the swift-5.1 bot problem eg https://ci.swift.org/job/oss-swift-5.1-package-osx/

build-script: support CMake install steps.

Currently, bots that perfrom an installation will build LLDB once using CMake
because that is the default and then again using Xcode because the CMake
install step is not implemented by build-script. This patch adds CMake support
by calling the generic cmake install-lldb step.

rdar://problem/51317901

(cherry picked from commit 78218b0)

[jasonmolenda]

@swift-ci please test

[shahmishal]

@swift-ci build toolchain macOS

[swift-ci]

Build failed
Swift Test Linux Platform
Git Sha - 529e7fd

[jasonmolenda]

@swift-ci test linux

[swift-ci]

Build failed
Swift Test Linux Platform
Git Sha - 529e7fd

[jasonmolenda]

@swift-ci test linux

[swift-ci]

macOS Toolchain
Download Toolchain
Git Sha - 529e7fd

Install command
tar -zxf swift-PR-27886-405-osx.tar.gz --directory ~/

[swift-ci]

Build failed
Swift Test Linux Platform
Git Sha - 529e7fd

[jasonmolenda]

The linux build is failing with some unrelated error?

7:52:42 2019-10-26 00:52:42.813 SourceKitLSPPackageTests.xctest[93680:f67fc700] manifest parse error(s):
17:52:42
/home/buildnode/jenkins/workspace/swift-PR-Linux/branch-swift-5.1-branch/tmp/TemporaryDirectory.PFxAzl/pkg/Package.swift:3:5: error: type annotation missing in pattern
17:52:42 let pack
17:52:42 ^

[jasonmolenda]

I had it run the linux build twice, both failed, I can't remember if it was the same error both times tho.

[shahmishal]

@swift-ci test Linux

[swift-ci]

Build failed
Swift Test Linux Platform
Git Sha - 529e7fd

[shahmishal]

14:47:30 lit.py: /home/buildnode/jenkins/workspace/swift-PR-Linux/branch-swift-5.1-branch/swift-integration-tests/lit.cfg:189: note: testing using 'repl_swift': /home/buildnode/jenkins/workspace/swift-PR-Linux/branch-swift-5.1-branch/buildbot_linux/none-swift_package_sandbox_linux-x86_64/usr/bin/repl_swift
14:47:30 lit.py: /home/buildnode/jenkins/workspace/swift-PR-Linux/branch-swift-5.1-branch/swift-integration-tests/lit.cfg:205: fatal: repl_swift does not exist!

Looks like repl_swift is missing

[jasonmolenda]

I was able to reproduce the failure of the bot on my machine and confirm a more direct fix for it; I'm going to see how that PR passes all the bots and commit that if it looks good, doing that in swiftlang/llvm-project#42

[jasonmolenda]

Test with PR:
swiftlang/llvm-project#42

@swift-ci test build toolchain

[shahmishal]

Test with PR:
swiftlang/llvm-project#42

@swift-ci build toolchain

[swift-ci]

macOS Toolchain
Download Toolchain
Git Sha - 529e7fd

Install command
tar -zxf swift-PR-27886-408-osx.tar.gz --directory ~/

[shahmishal]

@jasonmolenda Looks like it failed on Linux, with missing repl_swift file.

'repl_swift': /home/buildnode/jenkins/workspace/swift-PR-toolchain-Linux/branch-swift-5.1-branch/buildbot_linux/none-swift_package_sandbox_linux-x86_64/usr/bin/repl_swift
19:03:33 lit.py: /home/buildnode/jenkins/workspace/swift-PR-toolchain-Linux/branch-swift-5.1-branch/swift-integration-tests/lit.cfg:205: fatal: repl_swift does not exist!

[jasonmolenda]

@jasonmolenda Looks like it failed on Linux, with missing repl_swift file.

'repl_swift': /home/buildnode/jenkins/workspace/swift-PR-toolchain-Linux/branch-swift-5.1-branch/buildbot_linux/none-swift_package_sandbox_linux-x86_64/usr/bin/repl_swift
19:03:33 lit.py: /home/buildnode/jenkins/workspace/swift-PR-toolchain-Linux/branch-swift-5.1-branch/swift-integration-tests/lit.cfg:205: fatal: repl_swift does not exist!

Yeah my plan is to solve this with the more direct fix in swiftlang/llvm-project#42 --- I don't want to bother messing with this fix if I don't need to.