Hannes Siebenhandl pushed to branch wip/fendor/dep-json at Glasgow Haskell Compiler / GHC Commits: 821889fb by fendor at 2026-10-13T21:55:52+02:00 Add `-dep-json` flag to `ghc -M` Add an optional flag to `ghc -M` that allows to write the dependency information in JSON Lines format. The JSON Lines format enables us to stream the output of the dependency generation to a consumer. The output of `-dep-json` is streamed to a temporary file and then copied to the final destination to avoid partial writes. Each line contains one of two possible json objects: 1. A Home Unit Dependency * Contains the name of the home module, its unit, where it is located, whether a preprocessor is used, and all of its imports. Importantly, the imports include `-XExplicitLevelImports` information. * If requested via `-include-pkg-deps`, includes imports of external units, e.g. modules from `base`. * If requested via `-include-cpp-deps`, files included via CPP. 2. External Unit Dependency * Only if `-include-pkg-deps` is given * Contains unit-id, its package name and package id. - - - - - 7efdd5c5 by fendor at 2026-10-13T21:55:52+02:00 Add multiple home unit support to `ghc -M` Allows to process the module graph of multiple home units at once using the same syntax as `--make` and `--interactive`: ghc -M -unit @unitA -unit @unitB The semantics are identical to `--make` and `--interactive`. Each home unit can declare individually to use `-include-cpp-deps` and `-include-pkg-deps`. However, there can only be one output file, and `-dep-json` and `-dep-makefile` can only be provided at the top of the cli invocation. We introduce a new GHC API `doMkDepend` that allows to use multiple home units conveniently. The output of `-dep-json` and `-dep-makefile` does not change, since we were careful to choose a format that supports multiple home units from the start. Single home units are still accepted like before with no changes. - - - - - 57781c86 by fendor at 2026-10-13T21:55:52+02:00 Deprecate `doMkDependHS` in favour of `doMkDepend` - - - - - cd063639 by fendor at 2026-10-13T21:55:52+02:00 Improve `ghc -M` test-suite Adds a more extensive test-suite for `ghc -M` mode. Introduce a dedicated test mode for running `ghc -M` tests more conveniently. Adds lots of normalizers that help to write `ghc -M` tests in a platform independent manner. Adds utility scripts that help format the output of `ghc -M`. Add new perf regression tests for json and makefile generation. Add perf regression test for multiple home unit support. - - - - - 62 changed files: - + changelog.d/make-depends-json - compiler/GHC/Driver/DynFlags.hs - compiler/GHC/Driver/MakeFile.hs - compiler/GHC/Driver/Session.hs - compiler/GHC/Driver/Session/Units.hs - compiler/GHC/Utils/Json.hs - + docs/users_guide/make-depends-json-schema-1_0.json - docs/users_guide/separate_compilation.rst - ghc/Main.hs - testsuite/driver/testglobals.py - testsuite/driver/testlib.py - testsuite/tests/driver/mkdepend/Makefile - + testsuite/tests/driver/mkdepend/README.md - testsuite/tests/driver/mkdepend/A.hs → testsuite/tests/driver/mkdepend/T24384/A.hs - testsuite/tests/driver/mkdepend/C.hs → testsuite/tests/driver/mkdepend/T24384/C.hs - testsuite/tests/driver/mkdepend/C.hs-boot → testsuite/tests/driver/mkdepend/T24384/C.hs-boot - testsuite/tests/driver/mkdepend/D.hs → testsuite/tests/driver/mkdepend/T24384/D.hs - testsuite/tests/driver/mkdepend/E.hs → testsuite/tests/driver/mkdepend/T24384/E.hs - testsuite/tests/driver/mkdepend/dep-internal/DepInternal.hs → testsuite/tests/driver/mkdepend/T24384/dep-internal/DepInternal.hs - testsuite/tests/driver/mkdepend/dep-internal/dep-internal.pkg → testsuite/tests/driver/mkdepend/T24384/dep-internal/dep-internal.pkg - testsuite/tests/driver/mkdepend/dep-public/DepPublic.hs → testsuite/tests/driver/mkdepend/T24384/dep-public/DepPublic.hs - testsuite/tests/driver/mkdepend/dep-public/dep-public.pkg → testsuite/tests/driver/mkdepend/T24384/dep-public/dep-public.pkg - testsuite/tests/driver/mkdepend/dep/Dep.hs → testsuite/tests/driver/mkdepend/T24384/dep/Dep.hs - testsuite/tests/driver/mkdepend/dep/dep.pkg → testsuite/tests/driver/mkdepend/T24384/dep/dep.pkg - testsuite/tests/driver/mkdepend/foo.h → testsuite/tests/driver/mkdepend/T24384/foo.h - testsuite/tests/driver/mkdepend/lib/B.hs → testsuite/tests/driver/mkdepend/T24384/lib/B.hs - + testsuite/tests/driver/mkdepend/T24384/lib/B.hs-boot - testsuite/tests/driver/mkdepend/preproc.sh → testsuite/tests/driver/mkdepend/T24384/preproc.sh - testsuite/tests/driver/mkdepend/T24384a.stdout - + testsuite/tests/driver/mkdepend/T24384b.stdout - + testsuite/tests/driver/mkdepend/T24384c.stdout - testsuite/tests/driver/mkdepend/all.T - + testsuite/tests/driver/mkdepend/format_json.sh - + testsuite/tests/driver/mkdepend/format_makefile.sh - + testsuite/tests/driver/mkdepend/mhu01/a/A/Base.hs - + testsuite/tests/driver/mkdepend/mhu01/a/A/Base.hs-boot - + testsuite/tests/driver/mkdepend/mhu01/a/A/TH.hs - + testsuite/tests/driver/mkdepend/mhu01/a/Util.hs - + testsuite/tests/driver/mkdepend/mhu01/b/B/Normal.hs - + testsuite/tests/driver/mkdepend/mhu01/b/B/Splice.hs - + testsuite/tests/driver/mkdepend/mhu01/b/Util.hs - + testsuite/tests/driver/mkdepend/mhu01/c/C.hs - + testsuite/tests/driver/mkdepend/mhu01/unitA - + testsuite/tests/driver/mkdepend/mhu01/unitB - + testsuite/tests/driver/mkdepend/mhu01/unitC - + testsuite/tests/driver/mkdepend/mhu02/A.hs - + testsuite/tests/driver/mkdepend/mhu02/B.hs - + testsuite/tests/driver/mkdepend/mhu02/pp.sh - + testsuite/tests/driver/mkdepend/mhu02/unitA - + testsuite/tests/driver/mkdepend/mhu02/unitB - + testsuite/tests/driver/mkdepend/mhu03/pkg/A.hs - + testsuite/tests/driver/mkdepend/mhu03/pkg/pp.sh - + testsuite/tests/driver/mkdepend/mhu03/unitA - + testsuite/tests/driver/mkdepend/mkdepend01.dep-json - + testsuite/tests/driver/mkdepend/mkdepend01.dep-makefile - + testsuite/tests/driver/mkdepend/mkdepend01/A.hs - + testsuite/tests/driver/mkdepend/mkdepend_mhu01.dep-json - + testsuite/tests/driver/mkdepend/mkdepend_mhu01.dep-makefile - + testsuite/tests/driver/mkdepend/mkdepend_mhu02.dep-json - + testsuite/tests/driver/mkdepend/mkdepend_mhu03.dep-json - testsuite/tests/perf/compiler/large-project/all.T - + testsuite/tests/perf/compiler/large-project/large-project-mhu.sh The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/f10cb35cf25d9a55c591a9c05e9addd... -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/f10cb35cf25d9a55c591a9c05e9addd... You're receiving this email because of your account on gitlab.haskell.org. Manage all notifications: https://gitlab.haskell.org/-/profile/notifications | Help: https://gitlab.haskell.org/help