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feat: add support for source-maps #85

Merged
merged 8 commits into from
May 2, 2019
Merged

feat: add support for source-maps #85

merged 8 commits into from
May 2, 2019

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bcoe
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@bcoe bcoe commented Apr 29, 2019 •
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This adds initial support for source-maps, the brunt of the work was ultimately this pull in v8-to-istanbul. Coverage with source-maps seems to be working pretty well on my TypeScript projects (which makes me very happy 😄)

Screen Shot 2019-04-29 at 12 01 46 AM

Some Notable Changes

  • lines in v8-to-istanbul now start with a count of 1, prior to this we were relying on the fact that V8 would always have an outer function that has an execution count of 1 for all its lines.
    • this was not working reliably, once mapping was applied, and I figured why not just default to count = 1 if the outer function was a tautology any ways?
  • a bunch of methods in c8 are now async, this was because the heavy-lifting source-map library is async.

TODO

  • write integration tests for a variety of source-maps.
  • make sure this doesn't introduce any major performance regressions on the Node.js codebase, which uses c8's reporting functionality.

If you would like to experiment, I am publishing this to a next branch, as 4.0.0-candidate.0.

BREAKING CHANGE: c8 will now load source-maps if possible and remap coverage accordingly

CC: @SimenB (please take this for a spin if interested), @hashseed (I think this unblocks me from some of the remapping work I was bumping into issues on), @sebmck (would love your extra set of eyes).

Checklist
  • npm test, tests passing

@bcoe bcoe requested a review from shinnn April 29, 2019 07:11
@bcoe
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bcoe commented Apr 29, 2019

@jdalton, I finally got source-maps implemented ... you might be able to play with c8 a bit more in conjunction with ESM now?

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coveralls commented Apr 29, 2019 •
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Pull Request Test Coverage Report for Build 206

  • 15 of 15 (100.0%) changed or added relevant lines in 4 files are covered.
  • No unchanged relevant lines lost coverage.
  • Overall coverage increased (+0.8%) to 96.624%
Totals Coverage Status
Change from base Build 190: 0.8%
Covered Lines: 396
Relevant Lines: 403
💛 - Coveralls

@bcoe bcoe merged commit 6ca4345 into master May 2, 2019
@bcoe bcoe deleted the source-map-v2 branch May 2, 2019 02:17
@jdalton
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jdalton commented May 2, 2019

So rad! Thank you 🎉 🌮 🎉

@SimenB SimenB mentioned this pull request May 26, 2019
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@github-actions github-actions bot mentioned this pull request Apr 20, 2022
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github-actions bot pushed a commit to prantlf/c8 that referenced this pull request Apr 2, 2023
@semantic-release-bot
chore(release): 1.0.0 [skip ci]
8a76426 
# 1.0.0 (2023-04-02)

### Bug Fixes

* `--all` now respects `--extension` flag. ([bcoe#357](https://github.com/prantlf/c8/issues/357)) ([a5deb27](a5deb27))
* add missing space in text ([bcoe#245](https://github.com/prantlf/c8/issues/245)) ([efe6d04](efe6d04))
* address bugs with source remapping on Windows ([bcoe#301](https://github.com/prantlf/c8/issues/301)) ([c817902](c817902))
* address file:// issue with CJS ([bcoe#39](https://github.com/prantlf/c8/issues/39)) ([d4f9cab](d4f9cab))
* all flag not propagated to check-coverage command ([bcoe#188](https://github.com/prantlf/c8/issues/188)) ([86eaf72](86eaf72))
* **config:** support configuration inheritance ([bcoe#343](https://github.com/prantlf/c8/issues/343)) ([e81ed5d](e81ed5d))
* **deps:** merging failed when the same script occurred multiple times in the same report ([bcoe#147](https://github.com/prantlf/c8/issues/147)) ([1ebcaf9](1ebcaf9))
* **deps:** update dependency find-up to v4 ([bcoe#119](https://github.com/prantlf/c8/issues/119)) ([c568d96](c568d96))
* **deps:** update dependency find-up to v5 ([bcoe#242](https://github.com/prantlf/c8/issues/242)) ([8a0cfd7](8a0cfd7))
* **deps:** update dependency furi to v2 ([bcoe#193](https://github.com/prantlf/c8/issues/193)) ([6b9af6e](6b9af6e))
* **deps:** update dependency rimraf to v3 ([bcoe#132](https://github.com/prantlf/c8/issues/132)) ([7601748](7601748))
* **deps:** update dependency v8-to-istanbul to v4 ([bcoe#167](https://github.com/prantlf/c8/issues/167)) ([97b9769](97b9769))
* **deps:** update dependency yargs to v14 ([bcoe#134](https://github.com/prantlf/c8/issues/134)) ([e49737f](e49737f))
* **deps:** update dependency yargs to v15 ([bcoe#164](https://github.com/prantlf/c8/issues/164)) ([e41a483](e41a483))
* **deps:** update dependency yargs to v16 ([bcoe#251](https://github.com/prantlf/c8/issues/251)) ([0436816](0436816))
* **deps:** update dependency yargs-parser to v13 ([bcoe#124](https://github.com/prantlf/c8/issues/124)) ([1eb3394](1eb3394))
* **deps:** update dependency yargs-parser to v14 ([bcoe#144](https://github.com/prantlf/c8/issues/144)) ([9b3d089](9b3d089))
* **deps:** update dependency yargs-parser to v15 ([bcoe#153](https://github.com/prantlf/c8/issues/153)) ([80153de](80153de))
* **deps:** update dependency yargs-parser to v16 ([bcoe#157](https://github.com/prantlf/c8/issues/157)) ([15746e5](15746e5))
* **deps:** update dependency yargs-parser to v17 ([bcoe#201](https://github.com/prantlf/c8/issues/201)) ([d730c63](d730c63))
* **deps:** update dependency yargs-parser to v18 ([bcoe#202](https://github.com/prantlf/c8/issues/202)) ([983de44](983de44))
* **deps:** update dependency yargs-parser to v19 ([bcoe#241](https://github.com/prantlf/c8/issues/241)) ([baa01df](baa01df))
* **deps:** update dependency yargs-parser to v20 ([bcoe#252](https://github.com/prantlf/c8/issues/252)) ([ae845f0](ae845f0))
* **deps:** update deps to address warning in cross-spawn ([bcoe#141](https://github.com/prantlf/c8/issues/141)) ([4b66221](4b66221))
* **deps:** update deps to latest ([bcoe#384](https://github.com/prantlf/c8/issues/384)) ([78eac8c](78eac8c)), closes [bcoe#375](https://github.com/prantlf/c8/issues/375)
* **deps:** v8-to-istanbul with fix for Windows paths ([bcoe#311](https://github.com/prantlf/c8/issues/311)) ([ef1b875](ef1b875))
* **deps:** v8-to-istanbul with patch for crasher ([bcoe#200](https://github.com/prantlf/c8/issues/200)) ([d4b7d80](d4b7d80))
* **deps:** v8-to-istnbul with fixes for Node 10/18 ([bcoe#392](https://github.com/prantlf/c8/issues/392)) ([d5f642a](d5f642a))
* do not override NODE_V8_COVERAGE if set ([bcoe#70](https://github.com/prantlf/c8/issues/70)) ([8bb67b0](8bb67b0))
* don't load JSON that does not look like coverage ([bcoe#146](https://github.com/prantlf/c8/issues/146)) ([a6481f1](a6481f1))
* escaping issue with cobertura reporter ([bcoe#203](https://github.com/prantlf/c8/issues/203)) ([e93747b](e93747b))
* exclude coverage of the CJS-ESM bridge from results ([bcoe#83](https://github.com/prantlf/c8/issues/83)) ([da2c945](da2c945))
* exit with code 1 when report output fails ([bcoe#92](https://github.com/prantlf/c8/issues/92)) ([a27b694](a27b694))
* file URL to system path conversion ([bcoe#46](https://github.com/prantlf/c8/issues/46)) ([e7f8cf2](e7f8cf2))
* fix package.json `test:snap` script to use cross-env ([bcoe#366](https://github.com/prantlf/c8/issues/366)) ([5d2981c](5d2981c))
* Fix usage of excludeAfterRemap not to set the coverage always to 100 ([9113449](9113449)), closes [bcoe#462](https://github.com/prantlf/c8/issues/462)
* float patch for branch/function coverage merge bug ([bcoe#56](https://github.com/prantlf/c8/issues/56)) ([1de0cca](1de0cca))
* HTML report now has correct source positions for Node >10.16.0 ([bcoe#125](https://github.com/prantlf/c8/issues/125)) ([c49fa7f](c49fa7f))
* ignore missing source maps in raw coverage output ([bcoe#233](https://github.com/prantlf/c8/issues/233)) ([eed98af](eed98af))
* make tests run on Windows ([bcoe#25](https://github.com/prantlf/c8/issues/25)) ([08e44d0](08e44d0))
* make tmp directory regardless of clean ([44d2185](44d2185))
* **perf:** cache `this.exclude.shouldInstrument` for improved performance ([bcoe#388](https://github.com/prantlf/c8/issues/388)) ([8b36f23](8b36f23))
* pin to functional version of spawn-wrap ([d1ced8c](d1ced8c))
* process coverage merging ([bcoe#37](https://github.com/prantlf/c8/issues/37)) ([67959b4](67959b4))
* regex flags in dependency were breaking Node 8 ([a9d9645](a9d9645))
* remove the unmaintained mkdirp dependency ([bcoe#91](https://github.com/prantlf/c8/issues/91)) ([a465b65](a465b65))
* snapshot ([7fd9e13](7fd9e13))
* support [email protected] built-in modules ([bcoe#265](https://github.com/prantlf/c8/issues/265)) ([1b90a22](1b90a22))
* switch to mkdirp for Node 8 ([206b83f](206b83f))
* temporary files should be in tmp folder ([bcoe#106](https://github.com/prantlf/c8/issues/106)) ([64dd2e6](64dd2e6))
* tweak inspector event timing ([bcoe#6](https://github.com/prantlf/c8/issues/6)) ([01f654e](01f654e))
* **types:** add excludeAfterRemap and allowExternal  ([bcoe#297](https://github.com/prantlf/c8/issues/297)) ([e32a53f](e32a53f))
* Upgrade dependencies ([c288f5f](c288f5f))
* upgrade to @bcoe/v8-coverage with breaking regex dropped ([6c28e7f](6c28e7f))
* **v8-to-istanbul:** fixes shebang handling/ignore behavior ([bcoe#267](https://github.com/prantlf/c8/issues/267)) ([21cd41f](21cd41f))
* **v8-to-istanbul:** pull in fix for missing branches ([bcoe#258](https://github.com/prantlf/c8/issues/258)) ([eaffa78](eaffa78))
* **v8-to-istanbul:** revert off by one that broke TypeScript ([bcoe#262](https://github.com/prantlf/c8/issues/262)) ([81ab5b7](81ab5b7))
* we were not exiting with 1 if mkdir failed ([bcoe#89](https://github.com/prantlf/c8/issues/89)) ([fb02ed6](fb02ed6))

* feat!: use Node.js' source-map cache, to support tools like ts-node (bcoe#152) ([53bba15](53bba15)), closes [bcoe#152](https://github.com/prantlf/c8/issues/152)
* feat!: default temp directory to report directory (bcoe#102) ([8602f4a](8602f4a)), closes [bcoe#102](https://github.com/prantlf/c8/issues/102)

### Features

* `--100` ([bcoe#332](https://github.com/prantlf/c8/issues/332)) ([4205f2f](4205f2f))
* add --config option and documentation on options and configs ([bcoe#308](https://github.com/prantlf/c8/issues/308)) ([99436ef](99436ef))
* add --exclude-node-modules option ([bcoe#321](https://github.com/prantlf/c8/issues/321)) ([a4733c6](a4733c6))
* add --extension option ([bcoe#331](https://github.com/prantlf/c8/issues/331)) ([ff01cd8](ff01cd8))
* add --report-dir alias (for consistency with nyc) ([0dd1b04](0dd1b04))
* add --skip-full ([bcoe#287](https://github.com/prantlf/c8/issues/287)) ([8b01b63](8b01b63))
* add `skipFull` and `excludeNodeModules` to type definitions ([bcoe#417](https://github.com/prantlf/c8/issues/417)) ([b93b9c0](b93b9c0))
* add support for 1:1 source-maps ([bcoe#85](https://github.com/prantlf/c8/issues/85)) ([6ca4345](6ca4345))
* add support for ignoring lines, functions, and blocks ([bcoe#87](https://github.com/prantlf/c8/issues/87)) ([c66950e](c66950e))
* add thresholds for enforcing coverage percentage ([bcoe#59](https://github.com/prantlf/c8/issues/59)) ([70e8943](70e8943))
* adds --all functionality ([bcoe#158](https://github.com/prantlf/c8/issues/158)) ([2eb631e](2eb631e))
* adds support for 1:many source maps ([bcoe#238](https://github.com/prantlf/c8/issues/238)) ([dbf94a0](dbf94a0))
* adds TypeScript definitions ([d39801b](d39801b)), closes [bcoe#195](https://github.com/prantlf/c8/issues/195)
* **all:** handle base64 inline source maps ([bcoe#283](https://github.com/prantlf/c8/issues/283)) ([3f12dd4](3f12dd4))
* allow  --reports-dir to be configured ([bcoe#65](https://github.com/prantlf/c8/issues/65)) ([5ab31f5](5ab31f5))
* allow relative paths to be optionally included ([3806c79](3806c79))
* allow script wrapper length to be specified ([bcoe#51](https://github.com/prantlf/c8/issues/51)) ([a22c4e0](a22c4e0))
* first pass at functional prototype without subprocess support ([bcoe#5](https://github.com/prantlf/c8/issues/5)) ([9534f56](9534f56))
* foreground-child's done() method was not being called ([bcoe#82](https://github.com/prantlf/c8/issues/82)) ([fde596e](fde596e))
* implement Istanbul reporting ([bcoe#8](https://github.com/prantlf/c8/issues/8)) ([8e430bf](8e430bf))
* improve test assertions ([bcoe#28](https://github.com/prantlf/c8/issues/28)) ([522720e](522720e))
* introduce --exclude-after-remap flag ([bcoe#293](https://github.com/prantlf/c8/issues/293)) ([53c4234](53c4234)), closes [bcoe#224](https://github.com/prantlf/c8/issues/224)
* load .nycrc/.nycrc.json to simplify migration ([bcoe#100](https://github.com/prantlf/c8/issues/100)) ([bd7484f](bd7484f))
* playing around with initial implementation ([18f5471](18f5471))
* support --check-coverage for reports ([bcoe#60](https://github.com/prantlf/c8/issues/60)) ([b542930](b542930))
* support for instrumenting files outside of current working directory ([7e53a0e](7e53a0e))
* support ignore start/stop comment ([bcoe#273](https://github.com/prantlf/c8/issues/273)) ([90949fa](90949fa)), closes [bcoe#271](https://github.com/prantlf/c8/issues/271)
* support passing reporter options ([bcoe#423](https://github.com/prantlf/c8/issues/423)) ([bc347a9](bc347a9))
* switch to stderr and default port ([bcoe#7](https://github.com/prantlf/c8/issues/7)) ([bb117b7](bb117b7))
* switch to using Node's built in coverage ([bcoe#22](https://github.com/prantlf/c8/issues/22)) ([3c1b92b](3c1b92b))
* **types:** add typings for reporterOptions ([bcoe#446](https://github.com/prantlf/c8/issues/446)) ([3646e6e](3646e6e))
* use debuglog rather than console.warn ([bcoe#279](https://github.com/prantlf/c8/issues/279)) ([7c04a4d](7c04a4d))
* use process.stdout.columns for reporter maxCols ([bcoe#409](https://github.com/prantlf/c8/issues/409)) ([7731574](7731574))
* warn instead of throw on exception ([bcoe#29](https://github.com/prantlf/c8/issues/29)) ([a8620d4](a8620d4))

### BREAKING CHANGES

* Node.js' source-map and lineLength cache is now used to remap coverage output (this allows tools like ts-node to be supported, which transpile at runtime).
* temp directory now defaults to setting for report directory
* c8 will now load source-maps if possible and remap coverage accordingly
* switches to using NODE_V8_COVERAGE rather than inspector directly
* dropped subprocess support for the time being, while we march towards an initial implementation.
github-actions bot pushed a commit to prantlf/c8 that referenced this pull request Apr 2, 2023
@semantic-release-bot
chore(release): 1.0.0 [skip ci]
496d2ae 
# 1.0.0 (2023-04-02)

### Bug Fixes

* `--all` now respects `--extension` flag. ([bcoe#357](https://github.com/prantlf/c8/issues/357)) ([a5deb27](a5deb27))
* add missing space in text ([bcoe#245](https://github.com/prantlf/c8/issues/245)) ([efe6d04](efe6d04))
* address bugs with source remapping on Windows ([bcoe#301](https://github.com/prantlf/c8/issues/301)) ([c817902](c817902))
* address file:// issue with CJS ([bcoe#39](https://github.com/prantlf/c8/issues/39)) ([d4f9cab](d4f9cab))
* all flag not propagated to check-coverage command ([bcoe#188](https://github.com/prantlf/c8/issues/188)) ([86eaf72](86eaf72))
* **config:** support configuration inheritance ([bcoe#343](https://github.com/prantlf/c8/issues/343)) ([e81ed5d](e81ed5d))
* **deps:** merging failed when the same script occurred multiple times in the same report ([bcoe#147](https://github.com/prantlf/c8/issues/147)) ([1ebcaf9](1ebcaf9))
* **deps:** update dependency find-up to v4 ([bcoe#119](https://github.com/prantlf/c8/issues/119)) ([c568d96](c568d96))
* **deps:** update dependency find-up to v5 ([bcoe#242](https://github.com/prantlf/c8/issues/242)) ([8a0cfd7](8a0cfd7))
* **deps:** update dependency furi to v2 ([bcoe#193](https://github.com/prantlf/c8/issues/193)) ([6b9af6e](6b9af6e))
* **deps:** update dependency rimraf to v3 ([bcoe#132](https://github.com/prantlf/c8/issues/132)) ([7601748](7601748))
* **deps:** update dependency v8-to-istanbul to v4 ([bcoe#167](https://github.com/prantlf/c8/issues/167)) ([97b9769](97b9769))
* **deps:** update dependency yargs to v14 ([bcoe#134](https://github.com/prantlf/c8/issues/134)) ([e49737f](e49737f))
* **deps:** update dependency yargs to v15 ([bcoe#164](https://github.com/prantlf/c8/issues/164)) ([e41a483](e41a483))
* **deps:** update dependency yargs to v16 ([bcoe#251](https://github.com/prantlf/c8/issues/251)) ([0436816](0436816))
* **deps:** update dependency yargs-parser to v13 ([bcoe#124](https://github.com/prantlf/c8/issues/124)) ([1eb3394](1eb3394))
* **deps:** update dependency yargs-parser to v14 ([bcoe#144](https://github.com/prantlf/c8/issues/144)) ([9b3d089](9b3d089))
* **deps:** update dependency yargs-parser to v15 ([bcoe#153](https://github.com/prantlf/c8/issues/153)) ([80153de](80153de))
* **deps:** update dependency yargs-parser to v16 ([bcoe#157](https://github.com/prantlf/c8/issues/157)) ([15746e5](15746e5))
* **deps:** update dependency yargs-parser to v17 ([bcoe#201](https://github.com/prantlf/c8/issues/201)) ([d730c63](d730c63))
* **deps:** update dependency yargs-parser to v18 ([bcoe#202](https://github.com/prantlf/c8/issues/202)) ([983de44](983de44))
* **deps:** update dependency yargs-parser to v19 ([bcoe#241](https://github.com/prantlf/c8/issues/241)) ([baa01df](baa01df))
* **deps:** update dependency yargs-parser to v20 ([bcoe#252](https://github.com/prantlf/c8/issues/252)) ([ae845f0](ae845f0))
* **deps:** update deps to address warning in cross-spawn ([bcoe#141](https://github.com/prantlf/c8/issues/141)) ([4b66221](4b66221))
* **deps:** update deps to latest ([bcoe#384](https://github.com/prantlf/c8/issues/384)) ([78eac8c](78eac8c)), closes [bcoe#375](https://github.com/prantlf/c8/issues/375)
* **deps:** v8-to-istanbul with fix for Windows paths ([bcoe#311](https://github.com/prantlf/c8/issues/311)) ([ef1b875](ef1b875))
* **deps:** v8-to-istanbul with patch for crasher ([bcoe#200](https://github.com/prantlf/c8/issues/200)) ([d4b7d80](d4b7d80))
* **deps:** v8-to-istnbul with fixes for Node 10/18 ([bcoe#392](https://github.com/prantlf/c8/issues/392)) ([d5f642a](d5f642a))
* do not override NODE_V8_COVERAGE if set ([bcoe#70](https://github.com/prantlf/c8/issues/70)) ([8bb67b0](8bb67b0))
* don't load JSON that does not look like coverage ([bcoe#146](https://github.com/prantlf/c8/issues/146)) ([a6481f1](a6481f1))
* escaping issue with cobertura reporter ([bcoe#203](https://github.com/prantlf/c8/issues/203)) ([e93747b](e93747b))
* exclude coverage of the CJS-ESM bridge from results ([bcoe#83](https://github.com/prantlf/c8/issues/83)) ([da2c945](da2c945))
* exit with code 1 when report output fails ([bcoe#92](https://github.com/prantlf/c8/issues/92)) ([a27b694](a27b694))
* file URL to system path conversion ([bcoe#46](https://github.com/prantlf/c8/issues/46)) ([e7f8cf2](e7f8cf2))
* fix package.json `test:snap` script to use cross-env ([bcoe#366](https://github.com/prantlf/c8/issues/366)) ([5d2981c](5d2981c))
* Fix usage of excludeAfterRemap not to set the coverage always to 100 ([9113449](9113449)), closes [bcoe#462](https://github.com/prantlf/c8/issues/462)
* float patch for branch/function coverage merge bug ([bcoe#56](https://github.com/prantlf/c8/issues/56)) ([1de0cca](1de0cca))
* HTML report now has correct source positions for Node >10.16.0 ([bcoe#125](https://github.com/prantlf/c8/issues/125)) ([c49fa7f](c49fa7f))
* ignore missing source maps in raw coverage output ([bcoe#233](https://github.com/prantlf/c8/issues/233)) ([eed98af](eed98af))
* make tests run on Windows ([bcoe#25](https://github.com/prantlf/c8/issues/25)) ([08e44d0](08e44d0))
* make tmp directory regardless of clean ([44d2185](44d2185))
* **perf:** cache `this.exclude.shouldInstrument` for improved performance ([bcoe#388](https://github.com/prantlf/c8/issues/388)) ([8b36f23](8b36f23))
* pin to functional version of spawn-wrap ([d1ced8c](d1ced8c))
* process coverage merging ([bcoe#37](https://github.com/prantlf/c8/issues/37)) ([67959b4](67959b4))
* regex flags in dependency were breaking Node 8 ([a9d9645](a9d9645))
* remove the unmaintained mkdirp dependency ([bcoe#91](https://github.com/prantlf/c8/issues/91)) ([a465b65](a465b65))
* snapshot ([7fd9e13](7fd9e13))
* support [email protected] built-in modules ([bcoe#265](https://github.com/prantlf/c8/issues/265)) ([1b90a22](1b90a22))
* switch to mkdirp for Node 8 ([206b83f](206b83f))
* temporary files should be in tmp folder ([bcoe#106](https://github.com/prantlf/c8/issues/106)) ([64dd2e6](64dd2e6))
* tweak inspector event timing ([bcoe#6](https://github.com/prantlf/c8/issues/6)) ([01f654e](01f654e))
* **types:** add excludeAfterRemap and allowExternal  ([bcoe#297](https://github.com/prantlf/c8/issues/297)) ([e32a53f](e32a53f))
* Upgrade dependencies ([985b219](985b219))
* upgrade to @bcoe/v8-coverage with breaking regex dropped ([6c28e7f](6c28e7f))
* **v8-to-istanbul:** fixes shebang handling/ignore behavior ([bcoe#267](https://github.com/prantlf/c8/issues/267)) ([21cd41f](21cd41f))
* **v8-to-istanbul:** pull in fix for missing branches ([bcoe#258](https://github.com/prantlf/c8/issues/258)) ([eaffa78](eaffa78))
* **v8-to-istanbul:** revert off by one that broke TypeScript ([bcoe#262](https://github.com/prantlf/c8/issues/262)) ([81ab5b7](81ab5b7))
* we were not exiting with 1 if mkdir failed ([bcoe#89](https://github.com/prantlf/c8/issues/89)) ([fb02ed6](fb02ed6))

* feat!: use Node.js' source-map cache, to support tools like ts-node (bcoe#152) ([53bba15](53bba15)), closes [bcoe#152](https://github.com/prantlf/c8/issues/152)
* feat!: default temp directory to report directory (bcoe#102) ([8602f4a](8602f4a)), closes [bcoe#102](https://github.com/prantlf/c8/issues/102)

### Features

* `--100` ([bcoe#332](https://github.com/prantlf/c8/issues/332)) ([4205f2f](4205f2f))
* add --config option and documentation on options and configs ([bcoe#308](https://github.com/prantlf/c8/issues/308)) ([99436ef](99436ef))
* add --exclude-node-modules option ([bcoe#321](https://github.com/prantlf/c8/issues/321)) ([a4733c6](a4733c6))
* add --extension option ([bcoe#331](https://github.com/prantlf/c8/issues/331)) ([ff01cd8](ff01cd8))
* add --report-dir alias (for consistency with nyc) ([0dd1b04](0dd1b04))
* add --skip-full ([bcoe#287](https://github.com/prantlf/c8/issues/287)) ([8b01b63](8b01b63))
* add `skipFull` and `excludeNodeModules` to type definitions ([bcoe#417](https://github.com/prantlf/c8/issues/417)) ([b93b9c0](b93b9c0))
* add support for 1:1 source-maps ([bcoe#85](https://github.com/prantlf/c8/issues/85)) ([6ca4345](6ca4345))
* add support for ignoring lines, functions, and blocks ([bcoe#87](https://github.com/prantlf/c8/issues/87)) ([c66950e](c66950e))
* add thresholds for enforcing coverage percentage ([bcoe#59](https://github.com/prantlf/c8/issues/59)) ([70e8943](70e8943))
* adds --all functionality ([bcoe#158](https://github.com/prantlf/c8/issues/158)) ([2eb631e](2eb631e))
* adds support for 1:many source maps ([bcoe#238](https://github.com/prantlf/c8/issues/238)) ([dbf94a0](dbf94a0))
* adds TypeScript definitions ([d39801b](d39801b)), closes [bcoe#195](https://github.com/prantlf/c8/issues/195)
* **all:** handle base64 inline source maps ([bcoe#283](https://github.com/prantlf/c8/issues/283)) ([3f12dd4](3f12dd4))
* allow  --reports-dir to be configured ([bcoe#65](https://github.com/prantlf/c8/issues/65)) ([5ab31f5](5ab31f5))
* allow relative paths to be optionally included ([3806c79](3806c79))
* allow script wrapper length to be specified ([bcoe#51](https://github.com/prantlf/c8/issues/51)) ([a22c4e0](a22c4e0))
* first pass at functional prototype without subprocess support ([bcoe#5](https://github.com/prantlf/c8/issues/5)) ([9534f56](9534f56))
* foreground-child's done() method was not being called ([bcoe#82](https://github.com/prantlf/c8/issues/82)) ([fde596e](fde596e))
* implement Istanbul reporting ([bcoe#8](https://github.com/prantlf/c8/issues/8)) ([8e430bf](8e430bf))
* improve test assertions ([bcoe#28](https://github.com/prantlf/c8/issues/28)) ([522720e](522720e))
* introduce --exclude-after-remap flag ([bcoe#293](https://github.com/prantlf/c8/issues/293)) ([53c4234](53c4234)), closes [bcoe#224](https://github.com/prantlf/c8/issues/224)
* load .nycrc/.nycrc.json to simplify migration ([bcoe#100](https://github.com/prantlf/c8/issues/100)) ([bd7484f](bd7484f))
* playing around with initial implementation ([18f5471](18f5471))
* support --check-coverage for reports ([bcoe#60](https://github.com/prantlf/c8/issues/60)) ([b542930](b542930))
* support for instrumenting files outside of current working directory ([7e53a0e](7e53a0e))
* support ignore start/stop comment ([bcoe#273](https://github.com/prantlf/c8/issues/273)) ([90949fa](90949fa)), closes [bcoe#271](https://github.com/prantlf/c8/issues/271)
* support passing reporter options ([bcoe#423](https://github.com/prantlf/c8/issues/423)) ([bc347a9](bc347a9))
* switch to stderr and default port ([bcoe#7](https://github.com/prantlf/c8/issues/7)) ([bb117b7](bb117b7))
* switch to using Node's built in coverage ([bcoe#22](https://github.com/prantlf/c8/issues/22)) ([3c1b92b](3c1b92b))
* **types:** add typings for reporterOptions ([bcoe#446](https://github.com/prantlf/c8/issues/446)) ([3646e6e](3646e6e))
* use debuglog rather than console.warn ([bcoe#279](https://github.com/prantlf/c8/issues/279)) ([7c04a4d](7c04a4d))
* use process.stdout.columns for reporter maxCols ([bcoe#409](https://github.com/prantlf/c8/issues/409)) ([7731574](7731574))
* warn instead of throw on exception ([bcoe#29](https://github.com/prantlf/c8/issues/29)) ([a8620d4](a8620d4))

### BREAKING CHANGES

* Node.js' source-map and lineLength cache is now used to remap coverage output (this allows tools like ts-node to be supported, which transpile at runtime).
* temp directory now defaults to setting for report directory
* c8 will now load source-maps if possible and remap coverage accordingly
* switches to using NODE_V8_COVERAGE rather than inspector directly
* dropped subprocess support for the time being, while we march towards an initial implementation.
mcknasty pushed a commit to mcknasty/c8 that referenced this pull request Feb 2, 2024
@bcoe
feat: add support for 1:1 source-maps (bcoe#85)
c67ea69 
BREAKING CHANGE: c8 will now load source-maps if possible and remap coverage accordingly
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@bcoe @coveralls @jdalton