Why does taskwarrior have so many external dependencies by default, including aws library dependencies?

[orsenthil]

senthil@zorin:~/task-3.4.2$ cmake --build build
[  1%] Building cxxbridge (version 1.0.144) with Rust toolchain 
[  1%] Built target cxxbridge_v1.0.144
[  1%] Built target cargo-prebuild_taskchampion_lib
   Compiling libc v0.2.171
   Compiling proc-macro2 v1.0.94
   Compiling unicode-ident v1.0.18
   Compiling cfg-if v1.0.0
   Compiling autocfg v1.4.0
   Compiling shlex v1.3.0
   Compiling smallvec v1.14.0
   Compiling bytes v1.10.1
   Compiling pin-project-lite v0.2.16
   Compiling itoa v1.0.15
   Compiling parking_lot_core v0.9.10
   Compiling scopeguard v1.2.0
   Compiling futures-core v0.3.31
   Compiling zeroize v1.8.1
   Compiling once_cell v1.21.0
   Compiling fnv v1.0.7
   Compiling subtle v2.6.1
   Compiling serde v1.0.219
   Compiling version_check v0.9.5
   Compiling pin-utils v0.1.0
   Compiling futures-sink v0.3.31
   Compiling futures-task v0.3.31
   Compiling tracing-core v0.1.33
   Compiling untrusted v0.9.0
   Compiling typenum v1.18.0
   Compiling ryu v1.0.20
   Compiling powerfmt v0.2.0
   Compiling fs_extra v1.3.0
   Compiling dunce v1.0.5
   Compiling lock_api v0.4.12
   Compiling slab v0.4.9
   Compiling num-traits v0.2.19
   Compiling generic-array v0.14.7
   Compiling time-core v0.1.3
   Compiling foldhash v0.1.4
   Compiling http v1.3.1
   Compiling num-conv v0.1.0
   Compiling time-macros v0.2.20
   Compiling allocator-api2 v0.2.21
   Compiling quote v1.0.40
   Compiling equivalent v1.0.2
   Compiling http v0.2.12
   Compiling syn v2.0.100
   Compiling aws-lc-rs v1.12.6
   Compiling rustls-pki-types v1.11.0
   Compiling jobserver v0.1.32
   Compiling mio v1.0.3
   Compiling socket2 v0.5.8
   Compiling cc v1.2.16
   Compiling parking_lot v0.12.3
   Compiling signal-hook-registry v1.4.2
   Compiling getrandom v0.2.15
   Compiling http-body v1.0.1
   Compiling http-body-util v0.1.3
   Compiling num-integer v0.1.46
   Compiling hashbrown v0.15.2
   Compiling http-body v0.4.6
   Compiling stable_deref_trait v1.2.0
   Compiling log v0.4.26
   Compiling httparse v1.10.1
   Compiling cmake v0.1.54
   Compiling block-buffer v0.10.4
   Compiling crypto-common v0.1.6
   Compiling either v1.15.0
   Compiling vsimd v0.8.0
   Compiling percent-encoding v2.3.1
   Compiling outref v0.5.2
   Compiling try-lock v0.2.5
   Compiling bytes-utils v0.1.4
   Compiling digest v0.10.7
   Compiling want v0.3.1
   Compiling futures-channel v0.3.31
   Compiling const-oid v0.9.6
   Compiling indexmap v2.8.0
   Compiling tower-service v0.3.3
   Compiling base64ct v1.7.1
   Compiling rustls v0.23.23
   Compiling atomic-waker v1.1.2
   Compiling openssl-probe v0.1.6
   Compiling rand_core v0.6.4
   Compiling writeable v0.5.5
   Compiling litemap v0.7.5
   Compiling base64-simd v0.8.0
   Compiling semver v1.0.26
   Compiling form_urlencoded v1.2.1
   Compiling ring v0.17.14
   Compiling aws-lc-sys v0.27.0
   Compiling webpki-roots v0.26.8
   Compiling rustls-native-certs v0.8.1
   Compiling sync_wrapper v1.0.2
   Compiling tower-layer v0.3.3
   Compiling icu_locid_transform_data v1.5.0
   Compiling der v0.6.1
   Compiling crc32fast v1.4.2
   Compiling icu_properties_data v1.5.0
   Compiling base64 v0.21.7
   Compiling rustc_version v0.4.1
   Compiling write16 v1.0.0
   Compiling utf8_iter v1.0.4
   Compiling cpufeatures v0.2.17
   Compiling icu_normalizer_data v1.5.0
   Compiling rustls v0.21.12
   Compiling utf16_iter v1.0.5
   Compiling crypto-bigint v0.4.9
   Compiling ff v0.12.1
   Compiling base16ct v0.1.1
   Compiling rustls-pemfile v1.0.4
   Compiling group v0.12.1
   Compiling sha2 v0.10.8
   Compiling hmac v0.12.1
   Compiling httpdate v1.0.3
   Compiling memchr v2.7.4
   Compiling rustls-native-certs v0.6.3
   Compiling signature v1.6.4
   Compiling getrandom v0.3.1
   Compiling hex v0.4.3
   Compiling aws-types v1.3.6
   Compiling serde_json v1.0.140
   Compiling spki v0.6.0
   Compiling unicase v2.8.1
   Compiling base64 v0.22.1
   Compiling pkcs8 v0.9.0
   Compiling rfc6979 v0.3.1
   Compiling sec1 v0.3.0
   Compiling mime_guess v2.0.5
   Compiling elliptic-curve v0.12.3
   Compiling synstructure v0.13.1
   Compiling crypto-bigint v0.5.5
   Compiling fastrand v2.3.0
   Compiling ecdsa v0.14.8
   Compiling mime v0.3.17
   Compiling thiserror v2.0.12
   Compiling thiserror v1.0.69
   Compiling rustls-pemfile v2.2.0
   Compiling ahash v0.8.11
   Compiling p256 v0.11.1
   Compiling encoding_rs v0.8.35
   Compiling ipnet v2.11.0
   Compiling urlencoding v2.1.3
   Compiling rustversion v1.0.20
   Compiling regex-lite v0.1.6
   Compiling crc32c v0.6.8
   Compiling pem-rfc7468 v0.7.0
   Compiling num-bigint v0.4.6
   Compiling pkg-config v0.3.32
   Compiling xmlparser v0.13.6
   Compiling vcpkg v0.2.15
   Compiling anyhow v1.0.97
   Compiling tokio-macros v2.5.0
   Compiling serde_derive v1.0.219
   Compiling futures-macro v0.3.31
   Compiling tracing-attributes v0.1.28
   Compiling zerofrom-derive v0.1.6
   Compiling yoke-derive v0.7.5
   Compiling zerovec-derive v0.10.3
   Compiling tokio v1.44.2
   Compiling futures-util v0.3.31
   Compiling tracing v0.1.41
   Compiling displaydoc v0.2.5
   Compiling icu_provider_macros v1.5.0
   Compiling thiserror-impl v2.0.12
   Compiling zerofrom v0.1.6
   Compiling yoke v0.7.5
   Compiling thiserror-impl v1.0.69
   Compiling zerovec v0.10.4
   Compiling async-trait v0.1.87
   Compiling zerocopy v0.7.35
   Compiling crc-catalog v2.4.0
   Compiling crc v3.2.1
   Compiling tinystr v0.7.6
   Compiling icu_collections v1.5.0
   Compiling icu_locid v1.5.0
   Compiling libsqlite3-sys v0.30.1
   Compiling aws-smithy-xml v0.60.9
   Compiling der v0.7.9
   Compiling pem v3.0.5
   Compiling aho-corasick v1.1.3
   Compiling link-cplusplus v1.0.10
   Compiling icu_provider v1.5.0
   Compiling regex-syntax v0.8.5
   Compiling adler2 v2.0.0
   Compiling miniz_oxide v0.8.5
   Compiling crc64fast-nvme v1.2.0
   Compiling icu_locid_transform v1.5.0
   Compiling spki v0.7.3
   Compiling tokio-util v0.7.13
   Compiling h2 v0.4.8
   Compiling deranged v0.3.11
   Compiling aws-smithy-async v1.2.5
   Compiling tower v0.5.2
   Compiling icu_properties v1.5.1
   Compiling sct v0.7.1
   Compiling rustls-webpki v0.101.7
   Compiling h2 v0.3.26
   Compiling time v0.3.39
   Compiling hyper v1.6.0
   Compiling aws-smithy-types v1.3.0
   Compiling icu_normalizer v1.5.0
   Compiling hyper-util v0.1.10
   Compiling aws-smithy-runtime-api v1.7.4
   Compiling aws-smithy-eventstream v0.60.8
   Compiling idna_adapter v1.2.0
   Compiling idna v1.0.3
   Compiling tokio-rustls v0.24.1
   Compiling aws-smithy-http v0.62.0
   Compiling hyper v0.14.32
   Compiling url v2.5.4
   Compiling aws-credential-types v1.2.2
   Compiling uuid v1.15.1
   Compiling aws-smithy-json v0.61.3
   Compiling aws-sigv4 v1.3.0
   Compiling serde_urlencoded v0.7.1
   Compiling simple_asn1 v0.6.3
   Compiling aws-smithy-query v0.60.7
   Compiling regex-automata v0.4.9
   Compiling jsonwebtoken v9.3.1
   Compiling hashbrown v0.14.5
   Compiling google-cloud-token v0.1.2
   Compiling async-stream-impl v0.3.6
   Compiling sha1 v0.10.6
   Compiling md-5 v0.10.6
   Compiling home v0.5.11
   Compiling cxxbridge-flags v1.0.144
   Compiling cxx v1.0.144
   Compiling aws-smithy-checksums v0.63.1
   Compiling async-stream v0.3.6
   Compiling hashlink v0.9.1
   Compiling pkcs8 v0.10.2
   Compiling flate2 v1.1.0
   Compiling lru v0.12.5
   Compiling hyper-rustls v0.24.2
   Compiling fallible-streaming-iterator v0.1.9
   Compiling heck v0.5.0
   Compiling fallible-iterator v0.3.0
   Compiling iana-time-zone v0.1.61
   Compiling regex v1.11.1
   Compiling bitflags v2.9.0
   Compiling chrono v0.4.40
   Compiling strum_macros v0.26.4
   Compiling cxxbridge-macro v1.0.144
   Compiling strum v0.26.3
   Compiling byteorder v1.5.0
   Compiling rustls-webpki v0.102.8
   Compiling tokio-rustls v0.26.2
   Compiling ureq v2.12.1
   Compiling hyper-rustls v0.27.5
   Compiling aws-smithy-http-client v1.0.0
   Compiling reqwest v0.12.14
   Compiling aws-smithy-runtime v1.8.0
   Compiling google-cloud-metadata v0.5.1
   Compiling google-cloud-auth v0.17.2
   Compiling reqwest-middleware v0.4.1
   Compiling google-cloud-storage v0.23.0
   Compiling aws-runtime v1.5.6
   Compiling aws-sdk-sts v1.63.0
   Compiling aws-sdk-sso v1.62.0
   Compiling aws-sdk-ssooidc v1.63.0
   Compiling rusqlite v0.32.1
   Compiling aws-sdk-s3 v1.79.0
   Compiling aws-config v1.6.0
   Compiling taskchampion v2.0.2
   Compiling taskchampion-lib v0.1.0 (/home/senthil/task-3.4.2/src/taskchampion-cpp)
    Finished `release` profile [optimized] target(s) in 2m 27s

[djmitche]

Rust has a lots-of-small-tools kind of approach, so a list of dependencies is not unusual. The AWS and GCP depdendencies in particular are for syncing to AWS and GCP storage buckets. It's possible to disable sync methods in TaskChampion, which reduces the number of dependencies, but Taskwarrior builds all of them.