Supports incremental build in tsc --b --w mode#29161

Merged

sheetalkamat merged 23 commits intomasterfrom incrementalBuild

Jan 17, 2019

+1,016-513

Commits on Dec 21, 2018

Use watch factory instead of direct host functions in tsbuild to provide detailed information on watch invokations
sheetalkamat
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Make BuilderProgram as Program
sheetalkamat
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Make SolutionBuilder handle BuilderProgram in preparation to handle incremental builds
sheetalkamat
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Revert BuilderProgram to be redirected object to Program in preparation to set Program in state to undefined for storing.
sheetalkamat
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Add method to release held Program in BuilderProgram
sheetalkamat
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Use oldProgram to create the new Program.
sheetalkamat
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Use emit builder to emit only changed files.
sheetalkamat
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Update the timestamps of outputs that dont need to be written because of incremental build
sheetalkamat
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Commits on Dec 22, 2018

Handle prepend in incremental build. Always emit when program uses project reference with prepend since it cant tell changes in js/map files
sheetalkamat
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Commits on Dec 26, 2018

Commits on Dec 27, 2018

Use DirectoryStructureHost for fileExists and readFile
sheetalkamat
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Commits on Jan 9, 2019

Merge branch 'master' into incrementalBuild
sheetalkamat
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Commits on Jan 10, 2019

Fix typo
sheetalkamat
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Commits on Jan 11, 2019

Merge branch 'master' into incrementalBuild
sheetalkamat
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Commits on Jan 14, 2019

Commits on Jan 15, 2019

PR feedback
sheetalkamat
committed

Commits on Jan 17, 2019