Backed out 3 changesets (bug 1637544) for causing gecko decision task bustages.

CLOSED TREE

Backed out changeset 93b955e5c048 (bug 1637544)
Backed out changeset be0717d76643 (bug 1637544)
Backed out changeset 447fea64b68d (bug 1637544)

taskcluster/ci/build/android.yml

@@ -60,7 +60,6 @@ android-api-16/debug:
         actions: [get-secrets, build]
         config: ["builds/releng_base_android_64_builds.py"]
         custom-build-variant-cfg: api-16-debug
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang
@@ -84,7 +83,6 @@ android-x86/opt:
         actions: [get-secrets, build]
         config: ["builds/releng_base_android_64_builds.py"]
         custom-build-variant-cfg: x86
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang
@@ -105,7 +103,6 @@ android-x86-fuzzing/debug:
         actions: [get-secrets, build]
         config: ["builds/releng_base_android_64_builds.py"]
         custom-build-variant-cfg: x86-fuzzing-debug
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang
@@ -160,7 +157,6 @@ android-api-16/opt:
         actions: [get-secrets, build]
         config: ["builds/releng_base_android_64_builds.py"]
         custom-build-variant-cfg: api-16
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang
@@ -214,7 +210,6 @@ android-aarch64/opt:
         actions: [get-secrets, build]
         config: ["builds/releng_base_android_64_builds.py"]
         custom-build-variant-cfg: aarch64
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang
@@ -238,7 +233,6 @@ android-aarch64/debug:
         actions: [get-secrets, build]
         config: ["builds/releng_base_android_64_builds.py"]
         custom-build-variant-cfg: aarch64-debug
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang
@@ -292,7 +286,6 @@ android-x86_64/opt:
         actions: [get-secrets, build]
         config: ["builds/releng_base_android_64_builds.py"]
         custom-build-variant-cfg: x86_64
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang
@@ -344,7 +337,6 @@ android-x86_64/debug:
         actions: [get-secrets, build]
         config: ["builds/releng_base_android_64_builds.py"]
         custom-build-variant-cfg: x86_64-debug
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang
@@ -370,7 +362,6 @@ android-api-16-gcp/debug:
         actions: [get-secrets, build]
         config: ["builds/releng_base_android_64_builds.py"]
         custom-build-variant-cfg: api-16-debug
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang
@@ -398,7 +389,6 @@ android-x86-gcp/opt:
         actions: [get-secrets, build]
         config: ["builds/releng_base_android_64_builds.py"]
         custom-build-variant-cfg: x86
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang
@@ -425,7 +415,6 @@ android-api-16-gcp/opt:
         actions: [get-secrets, build]
         config: ["builds/releng_base_android_64_builds.py"]
         custom-build-variant-cfg: api-16
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang
@@ -452,7 +441,6 @@ android-aarch64-gcp/opt:
         actions: [get-secrets, build]
         config: ["builds/releng_base_android_64_builds.py"]
         custom-build-variant-cfg: aarch64
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang
@@ -479,7 +467,6 @@ android-aarch64-gcp/debug:
         actions: [get-secrets, build]
         config: ["builds/releng_base_android_64_builds.py"]
         custom-build-variant-cfg: aarch64-debug
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang
@@ -506,7 +493,6 @@ android-x86_64-gcp/opt:
         actions: [get-secrets, build]
         config: ["builds/releng_base_android_64_builds.py"]
         custom-build-variant-cfg: x86_64
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang
@@ -554,7 +540,6 @@ android-x86_64-asan-fuzzing/opt:
         actions: [get-secrets, build]
         config: ["builds/releng_base_android_64_builds.py"]
         custom-build-variant-cfg: x86_64-fuzzing-asan
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang-android-cross

taskcluster/ci/build/linux.yml

@@ -29,7 +29,6 @@ linux64/opt:
         tooltool-downloads: public
         need-xvfb: true
     run-on-projects: ['mozilla-central']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -111,7 +110,6 @@ linux64-fuzzing/debug:
         mozconfig-variant: debug-fuzzing
         tooltool-downloads: public
         need-xvfb: true
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -158,7 +156,6 @@ linux64/debug:
         mozconfig-variant: debug
         tooltool-downloads: public
         need-xvfb: true
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -340,7 +337,6 @@ linux64-base-toolchains/opt:
         secrets: true
         tooltool-downloads: public
         need-xvfb: true
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang-5.0
@@ -383,7 +379,6 @@ linux64-base-toolchains/debug:
         mozconfig-variant: debug
         tooltool-downloads: public
         need-xvfb: true
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang-5.0
@@ -507,7 +502,6 @@ linux/opt:
         tooltool-downloads: public
         need-xvfb: true
     run-on-projects: ['release']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -548,7 +542,6 @@ linux/debug:
         tooltool-downloads: public
         need-xvfb: true
     run-on-projects: ['release']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -594,7 +587,6 @@ linux-rusttests/opt:
         tooltool-downloads: public
         keep-artifacts: false
     run-on-projects: ['mozilla-central']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -635,7 +627,6 @@ linux-rusttests/debug:
         tooltool-downloads: public
         keep-artifacts: false
     run-on-projects: ['mozilla-central']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -811,7 +802,6 @@ linux64-asan/opt:
         mozconfig-variant: nightly-asan
         tooltool-downloads: public
         need-xvfb: true
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -851,7 +841,6 @@ linux64-tsan/opt:
         mozconfig-variant: tsan
         tooltool-downloads: public
         need-xvfb: true
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -894,7 +883,6 @@ linux64-tsan-fuzzing/opt:
         mozconfig-variant: tsan-fuzzing
         tooltool-downloads: public
         need-xvfb: true
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -940,7 +928,6 @@ linux64-asan-fuzzing/opt:
         mozconfig-variant: nightly-fuzzing-asan
         tooltool-downloads: public
         need-xvfb: true
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -986,7 +973,6 @@ linux64-asan-fuzzing-ccov/opt:
         mozconfig-variant: asan-fuzzing-ccov
         tooltool-downloads: public
         need-xvfb: true
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -1029,7 +1015,6 @@ linux64-fuzzing-ccov/opt:
         mozconfig-variant: fuzzing-ccov
         tooltool-downloads: public
         need-xvfb: true
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang
@@ -1123,7 +1108,6 @@ linux64-asan/debug:
         mozconfig-variant: debug-asan
         tooltool-downloads: public
         need-xvfb: true
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -1214,7 +1198,6 @@ linux64-noopt/debug:
         keep-artifacts: false
         need-xvfb: true
     run-on-projects: ['mozilla-central']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -1259,7 +1242,6 @@ linux64-rusttests/opt:
         tooltool-downloads: public
         keep-artifacts: false
     run-on-projects: ['mozilla-central']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -1299,7 +1281,6 @@ linux64-rusttests/debug:
         tooltool-downloads: public
         keep-artifacts: false
     run-on-projects: ['trunk']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -1346,7 +1327,6 @@ linux64-ccov/opt:
         mozconfig-variant: code-coverage-opt
         tooltool-downloads: public
         need-xvfb: true
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang
@@ -1385,7 +1365,6 @@ linux64-add-on-devel/opt:
         tooltool-downloads: public
         need-xvfb: true
     run-on-projects: ['mozilla-beta', 'mozilla-release']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -1427,7 +1406,6 @@ linux64-aarch64/opt:
         mozconfig-variant: opt
         tooltool-downloads: public
         need-xvfb: true
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -1472,7 +1450,6 @@ linux-gcp/debug:
         tooltool-downloads: public
         need-xvfb: true
     run-on-projects: ['release']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -1520,7 +1497,6 @@ linux-gcp/opt:
         tooltool-downloads: public
         need-xvfb: true
     run-on-projects: ['release']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -1562,7 +1538,6 @@ linux64-gcp/debug:
         mozconfig-variant: debug
         tooltool-downloads: public
         need-xvfb: true
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -1609,7 +1584,6 @@ linux64-gcp/opt:
         tooltool-downloads: public
         need-xvfb: true
     run-on-projects: ['mozilla-central']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils

taskcluster/ci/build/macosx.yml

@@ -31,7 +31,6 @@ macosx64/debug:
         custom-build-variant-cfg: cross-debug
         mozconfig-variant: debug
         tooltool-downloads: internal
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -77,7 +76,6 @@ macosx64/opt:
         secrets: true
         tooltool-downloads: internal
     run-on-projects: ['mozilla-central']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -121,7 +119,6 @@ macosx64-asan-fuzzing/opt:
         custom-build-variant-cfg: cross-fuzzing-asan
         mozconfig-variant: nightly-fuzzing-asan
         tooltool-downloads: internal
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -169,7 +166,6 @@ macosx64-fuzzing/debug:
         custom-build-variant-cfg: cross-fuzzing-debug
         mozconfig-variant: debug-fuzzing
         tooltool-downloads: internal
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -270,7 +266,6 @@ macosx64-noopt/debug:
         tooltool-downloads: internal
         keep-artifacts: false
     run-on-projects: ['mozilla-central']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -315,7 +310,6 @@ macosx64-add-on-devel/opt:
         mozconfig-variant: add-on-devel
         tooltool-downloads: internal
     run-on-projects: ['mozilla-beta', 'mozilla-release']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -411,7 +405,6 @@ macosx64-ccov/opt:
         mozconfig-variant: code-coverage
         tooltool-downloads: internal
     run-on-projects: ['mozilla-central']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -458,7 +451,6 @@ macosx64-gcp/debug:
         custom-build-variant-cfg: cross-debug
         mozconfig-variant: debug
         tooltool-downloads: internal
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -506,7 +498,6 @@ macosx64-gcp/opt:
         secrets: true
         tooltool-downloads: internal
     run-on-projects: ['mozilla-central']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils

taskcluster/ci/build/windows-mingw.yml

@@ -35,7 +35,6 @@ win32-mingwclang/opt:
             - builds/releng_sub_windows_configs/32_mingwclang.py
         mozconfig-variant: mingwclang
     run-on-projects: ['mozilla-central', 'mozilla-esr68', 'mozilla-esr78']
-    use-sccache: true
     fetches:
         toolchain:
             - mingw32-rust
@@ -69,7 +68,6 @@ win32-mingwclang/debug:
             - builds/releng_sub_windows_configs/32_mingwclang.py
         mozconfig-variant: mingwclang-debug
     run-on-projects: ['mozilla-central', 'mozilla-esr68', 'mozilla-esr78']
-    use-sccache: true
     fetches:
         toolchain:
             - mingw32-rust
@@ -103,7 +101,6 @@ win64-mingwclang/opt:
             - builds/releng_sub_windows_configs/64_mingwclang.py
         mozconfig-variant: mingwclang
     run-on-projects: ['mozilla-central', 'mozilla-esr68', 'mozilla-esr78']
-    use-sccache: true
     fetches:
         toolchain:
             - mingw32-rust
@@ -137,7 +134,6 @@ win64-mingwclang/debug:
             - builds/releng_sub_windows_configs/64_mingwclang.py
         mozconfig-variant: mingwclang-debug
     run-on-projects: ['mozilla-central', 'mozilla-esr68', 'mozilla-esr78']
-    use-sccache: true
     fetches:
         toolchain:
             - mingw32-rust

taskcluster/ci/build/windows.yml

@@ -45,7 +45,6 @@ win32/debug:
             env:
                 LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
                 LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -98,7 +97,6 @@ win32/opt:
                 LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
                 LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
     run-on-projects: ['mozilla-central']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -151,7 +149,6 @@ win64/debug:
             env:
                 LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
                 LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -198,7 +195,6 @@ win64-fuzzing/debug:
             - builds/taskcluster_sub_win64/debug.py
         mozconfig-variant: debug-fuzzing
     run-on-projects: ['trunk']
-    use-sccache: true
     fetches:
         toolchain:
             - win64-clang-cl
@@ -289,7 +285,6 @@ win64/opt:
                 LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
                 LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
     run-on-projects: ['mozilla-central']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -499,7 +494,6 @@ win32-add-on-devel/opt:
                 LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
         mozconfig-variant: add-on-devel
     run-on-projects: ['mozilla-beta', 'mozilla-release']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -549,7 +543,6 @@ win64-add-on-devel/opt:
                 LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
         mozconfig-variant: add-on-devel
     run-on-projects: ['mozilla-beta', 'mozilla-release']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -599,7 +592,6 @@ win64-noopt/debug:
                 LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
                 LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
     run-on-projects: ['mozilla-central']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -649,7 +641,6 @@ win32-noopt/debug:
                 LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
                 LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
     run-on-projects: ['mozilla-central']
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -698,7 +689,6 @@ win32-rusttests/opt:
             disable_package_metrics: true
         mozconfig-variant: rusttests
     run-on-projects: ['mozilla-central']
-    use-sccache: true
     fetches:
         toolchain:
             - win64-clang-cl
@@ -739,7 +729,6 @@ win32-rusttests/debug:
             disable_package_metrics: true
         mozconfig-variant: rusttests-debug
     run-on-projects: ['mozilla-central']
-    use-sccache: true
     fetches:
         toolchain:
             - win64-clang-cl
@@ -777,7 +766,6 @@ win64-rusttests/opt:
             - builds/taskcluster_sub_win64/rusttests_opt.py
         mozconfig-variant: rusttests
     run-on-projects: ['mozilla-central']
-    use-sccache: true
     fetches:
         toolchain:
             - win64-clang-cl
@@ -815,7 +803,6 @@ win64-rusttests/debug:
             - builds/taskcluster_sub_win64/rusttests_opt.py
         mozconfig-variant: rusttests-debug
     run-on-projects: ['trunk']
-    use-sccache: true
     fetches:
         toolchain:
             - win64-clang-cl
@@ -859,7 +846,6 @@ win64-ccov/opt:
             - builds/taskcluster_sub_win64/ccov_opt.py
         mozconfig-variant: code-coverage
     run-on-projects: ['mozilla-central']
-    use-sccache: true
     fetches:
         toolchain:
             - win64-clang-cl
@@ -897,7 +883,6 @@ win64-asan/debug:
             - builds/taskcluster_base_win64.py
             - builds/taskcluster_sub_win64/asan_debug.py
         mozconfig-variant: debug-asan
-    use-sccache: true
     fetches:
         toolchain:
             - win64-clang-cl
@@ -942,7 +927,6 @@ win64-asan/opt:
         extra-config:
             stage_platform: win64-asan
         mozconfig-variant: nightly-asan
-    use-sccache: true
     fetches:
         toolchain:
             - win64-clang-cl
@@ -1029,7 +1013,6 @@ win64-asan-fuzzing/opt:
         extra-config:
             stage_platform: win64-fuzzing-asan
         mozconfig-variant: nightly-fuzzing-asan
-    use-sccache: true
     fetches:
         toolchain:
             - win64-clang-cl
@@ -1200,7 +1183,6 @@ win64-aarch64/debug:
                 LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
                 LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.9.6"
         mozconfig-variant: debug
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils
@@ -1259,7 +1241,6 @@ win64-aarch64/opt:
             env:
                 LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
                 LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.9.6"
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils

taskcluster/ci/instrumented-build/kind.yml

@@ -29,13 +29,6 @@ job-defaults:
         actions: [get-secrets, build]
         script: mozharness/scripts/fx_desktop_build.py
         secrets: true
-    use-sccache:
-        by-release-level:
-            production: false
-            staging: true
-    fetches:
-        toolchain:
-            - linux64-sccache
 
 jobs:
     linux-shippable/opt:

taskcluster/ci/searchfox/kind.yml

@@ -131,7 +131,6 @@ jobs:
                 env:
                     LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
                     LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
-        use-sccache: true
         fetches:
             toolchain:
                 - linux64-binutils
@@ -175,7 +174,6 @@ jobs:
             secrets: true
             custom-build-variant-cfg: api-16-debug-searchfox
             tooltool-downloads: internal
-        use-sccache: true
         fetches:
             toolchain:
                 - android-gradle-dependencies

taskcluster/ci/static-analysis-autotest/kind.yml

@@ -54,7 +54,6 @@ jobs:
                 - builds/releng_sub_linux_configs/64_stat_and_debug.py
             tooltool-downloads: public
             keep-artifacts: false
-        use-sccache: true
         fetches:
             toolchain:
                 - linux64-clang
@@ -88,7 +87,6 @@ jobs:
             tooltool-downloads: internal
             extra-config:
                 mozconfig_variant: debug
-        use-sccache: true
         fetches:
             toolchain:
                 - win64-clang-cl

taskcluster/ci/toolchain/dist-toolchains.yml

@@ -21,7 +21,6 @@ clang-dist-toolchain:
     run:
         arguments: ['clang']
         toolchain-artifact: public/build/clang-dist-toolchain.tar.xz
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-clang-9
@@ -35,7 +34,6 @@ rustc-dist-toolchain:
     run:
         arguments: ['rustc']
         toolchain-artifact: public/build/rustc-dist-toolchain.tar.xz
-    use-sccache: true
     fetches:
         toolchain:
             - linux64-rust-cross-1.41

taskcluster/ci/valgrind/kind.yml

@@ -45,7 +45,6 @@ jobs:
             secrets: true
             tooltool-downloads: public
             need-xvfb: true
-        use-sccache: true
         fetches:
             toolchain:
                 - linux64-binutils

taskcluster/taskgraph/transforms/build.py

@@ -167,16 +167,6 @@ def use_profile_data(config, jobs):
         yield job
 
 
-@transforms.add
-def resolve_keys(config, jobs):
-    for job in jobs:
-        resolve_keyed_by(
-            job, 'use-sccache', item_name=job['name'],
-            **{'release-level': config.params.release_level()}
-        )
-        yield job
-
-
 @transforms.add
 def enable_full_crashsymbols(config, jobs):
     """Enable full crashsymbols on jobs with

taskcluster/taskgraph/transforms/job/__init__.py

@@ -67,7 +67,7 @@ job_description_schema = Schema({
     Optional('shipping-product'): task_description_schema['shipping-product'],
     Optional('always-target'): task_description_schema['always-target'],
     Exclusive('optimization', 'optimization'): task_description_schema['optimization'],
-    Optional('use-sccache'): task_description_schema['use-sccache'],
+    Optional('needs-sccache'): task_description_schema['needs-sccache'],
     Optional('release-artifacts'): task_description_schema['release-artifacts'],
     Optional('priority'): task_description_schema['priority'],
 
@@ -211,7 +211,6 @@ def use_fetches(config, jobs):
         dependencies = job.setdefault('dependencies', {})
         worker = job.setdefault('worker', {})
         prefix = get_artifact_prefix(job)
-        has_sccache = False
         for kind, artifacts in fetches.items():
             if kind in ('fetch', 'toolchain'):
                 for fetch_name in artifacts:
@@ -231,7 +230,7 @@ def use_fetches(config, jobs):
                     })
 
                     if kind == 'toolchain' and fetch_name.endswith('-sccache'):
-                        has_sccache = True
+                        job['needs-sccache'] = True
             else:
                 if kind not in dependencies:
                     raise Exception("{name} can't fetch {kind} artifacts because "
@@ -280,9 +279,6 @@ def use_fetches(config, jobs):
                         fetch['dest'] = dest
                     job_fetches.append(fetch)
 
-        if job.get('use-sccache') and not has_sccache:
-            raise Exception("Must provide an sccache toolchain if using sccache.")
-
         job_artifact_prefixes = {
             mozpath.dirname(fetch["artifact"])
             for fetch in job_fetches

taskcluster/taskgraph/transforms/job/mozharness.py

@@ -332,7 +332,7 @@ def mozharness_on_generic_worker(config, job, taskdesc):
         "{}/third_party/python/six".format(env['GECKO_PATH']),
     ])
 
-    if taskdesc.get('use-sccache'):
+    if taskdesc.get('needs-sccache'):
         worker['command'] = [
             # Make the comment part of the first command, as it will help users to
             # understand what is going on, and why these steps are implemented.

taskcluster/taskgraph/transforms/task.py

@@ -214,7 +214,7 @@ task_description_schema = Schema({
     'worker-type': text_type,
 
     # Whether the job should use sccache compiler caching.
-    Required('use-sccache'): bool,
+    Required('needs-sccache'): bool,
 
     # Set of artifacts relevant to release tasks
     Optional('release-artifacts'): [text_type],
@@ -489,7 +489,7 @@ def build_docker_worker_payload(config, task, task_def):
     if worker.get('docker-in-docker'):
         features['dind'] = True
 
-    if task.get('use-sccache'):
+    if task.get('needs-sccache'):
         features['taskclusterProxy'] = True
         task_def['scopes'].append(
             'assume:project:taskcluster:{trust_domain}:level-{level}-sccache-buckets'.format(
@@ -761,7 +761,7 @@ def build_generic_worker_payload(config, task, task_def):
 
     env = worker.get('env', {})
 
-    if task.get('use-sccache'):
+    if task.get('needs-sccache'):
         features['taskclusterProxy'] = True
         task_def['scopes'].append(
             'assume:project:taskcluster:{trust_domain}:level-{level}-sccache-buckets'.format(
@@ -1391,8 +1391,8 @@ def build_script_engine_autophone_payload(config, task, task_def):
     if worker.get('reboot'):
         task_def['payload'] = worker['reboot']
 
-    if task.get('use-sccache'):
-        raise Exception('use-sccache not supported in taskcluster-worker')
+    if task.get('needs-sccache'):
+        raise Exception('needs-sccache not supported in taskcluster-worker')
 
 
 transforms = TransformSequence()