History

Alex Rickabaugh af95dddd7e perf(ivy): eagerly parse the template twice during analysis (#34334 )

A quirk of the Angular template parser is that when parsing templates in the
"default" mode, with options specified by the user, the source mapping
information in the template AST may be inaccurate. As a result, the compiler
parses the template twice: once for "emit" and once to produce an AST with
accurate sourcemaps for diagnostic production.

Previously, only the first parse was performed during analysis. The second
parse occurred during the template type-checking phase, just in time to
produce the template type-checking file.

However, with the reuse of analysis results during incremental builds, it
makes more sense to do the diagnostic parse eagerly during analysis so that
the work isn't unnecessarily repeated in subsequent builds. This commit
refactors the `ComponentDecoratorHandler` to do both parses eagerly, which
actually cleans up some complexity around template parsing as well.

PR Close #34334

2019-12-12 14:13:16 -08:00

src

perf(ivy): eagerly parse the template twice during analysis (#34334 )

2019-12-12 14:13:16 -08:00

test

perf(ivy): reuse prior analysis work during incremental builds (#34288 )

2019-12-12 13:11:45 -08:00

BUILD.bazel

perf(ivy): reuse prior analysis work during incremental builds (#34288 )

2019-12-12 13:11:45 -08:00

index.ts

refactor(ngcc): add support for asynchronous execution (#32427 )

2019-09-09 15:55:13 -04:00

main-ivy-ngcc.ts

fix(ngcc): rename the executable from ivy-ngcc to ngcc (#33140 )

2019-10-14 16:29:14 +00:00

main-ngcc.ts

fix(ngcc): render legacy i18n message ids by default (#34135 )

2019-12-03 10:15:53 -08:00

README.md

refactor(ivy): move ngcc into a higher level folder (#29092 )

2019-03-20 14:45:54 -04:00

README.md

Angular Compatibility Compiler (ngcc)

This compiler will convert node_modules compiled with ngc, into node_modules which appear to have been compiled with ngtsc.

This conversion will allow such "legacy" packages to be used by the Ivy rendering engine.

Building

The project is built using Bazel:

yarn bazel build //packages/compiler-cli/ngcc

Unit Testing

The unit tests are built and run using Bazel:

yarn bazel test //packages/compiler-cli/ngcc/test

Integration Testing

There are tests that check the behavior of the overall executable:

yarn bazel test //packages/compiler-cli/ngcc/test:integration