Exclude README.md from cargo change tracking

In packages using cargo-readme, README.md files are touched by build.rs, which
triggers cargo's change tracking in the next build.  This means cargo is
rebuilding the package every time.

This change adds README.md to the exclude list in Cargo.toml files so that
cargo doesn't think a README change requires a rebuild.  Most of our packages
use cargo-readme to generate README.md, and for packages that don't, this still
isn't harmful; manual updates to README.md don't need a Rust build.  (Special
cases can just remove this exclude line.)

The downside is that accidental changes to README.md, like removing it, won't
be automatically corrected with a rebuild if you haven't touched anything else.
This should be rare, and will correct itself upon any other change.  (And a
developer is unlikely to commit such an accidental change.)

sources/api/apiclient/Cargo.toml

@@ -6,6 +6,8 @@ license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
 build = "build.rs"
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 futures = "0.3"

sources/api/apiserver/Cargo.toml

@@ -6,6 +6,8 @@ license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
 build = "build.rs"
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 actix-rt = "1.0.0"

sources/api/bork/Cargo.toml

@@ -5,6 +5,8 @@ authors = ["Samuel Mendoza-Jonas <[email protected]>"]
 license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 rand = "0.7.0"

sources/api/early-boot-config/Cargo.toml

@@ -6,6 +6,8 @@ license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
 build = "build.rs"
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 apiclient = { path = "../apiclient" }

sources/api/host-containers/Cargo.toml

@@ -6,6 +6,8 @@ license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
 build = "build.rs"
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 apiclient = { path = "../apiclient" }

sources/api/migration/migration-helpers/Cargo.toml

@@ -5,6 +5,8 @@ authors = ["Tom Kirchner <[email protected]>"]
 license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 apiserver = { path = "../../apiserver" }

sources/api/migration/migrations/v0.3.2/migrate-admin-container-v0-5-0/Cargo.toml

@@ -5,6 +5,8 @@ authors = ["Erikson Tung <[email protected]>"]
 license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 migration-helpers = { path = "../../../migration-helpers" }

sources/api/migration/migrations/v0.4.1/add-version-lock-ignore-waves/Cargo.toml

@@ -5,6 +5,8 @@ authors = ["Erikson Tung <[email protected]>"]
 license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 migration-helpers = { path = "../../../migration-helpers" }

sources/api/migration/migrations/v0.4.1/pivot-repo-2020-07-07/Cargo.toml

@@ -5,6 +5,8 @@ authors = ["Jamie Anderson <[email protected]"]
 license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 migration-helpers = { path = "../../../migration-helpers" }

sources/api/migration/migrator/Cargo.toml

@@ -6,6 +6,8 @@ license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
 build = "build.rs"
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 bottlerocket-release = { path = "../../../bottlerocket-release" }

sources/api/netdog/Cargo.toml

@@ -5,6 +5,8 @@ authors = ["Ben Cressey <[email protected]>"]
 license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 dns-lookup = "1.0"

sources/api/pluto/Cargo.toml

@@ -6,6 +6,8 @@ license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
 build = "build.rs"
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 reqwest = { version = "0.10", default-features = false, features = ["blocking"]}

sources/api/schnauzer/Cargo.toml

@@ -6,6 +6,8 @@ license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
 build = "build.rs"
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 apiclient = { path = "../apiclient" }

sources/api/servicedog/Cargo.toml

@@ -6,6 +6,8 @@ license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
 build = "build.rs"
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 apiclient = { path = "../apiclient" }

sources/api/settings-committer/Cargo.toml

@@ -6,6 +6,8 @@ license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
 build = "build.rs"
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 apiclient = { path = "../apiclient" }

sources/api/storewolf/Cargo.toml

@@ -6,6 +6,8 @@ license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
 build = "build.rs"
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 apiserver = { path = "../apiserver" }

sources/api/sundog/Cargo.toml

@@ -6,6 +6,8 @@ license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
 build = "build.rs"
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 apiclient = { path = "../apiclient" }

sources/api/thar-be-settings/Cargo.toml

@@ -6,6 +6,8 @@ license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
 build = "build.rs"
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 apiclient = { path = "../apiclient" }

sources/api/thar-be-updates/Cargo.toml

@@ -6,6 +6,8 @@ license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
 build = "build.rs"
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 apiclient = { path = "../apiclient" }

sources/bottlerocket-release/Cargo.toml

@@ -5,6 +5,8 @@ authors = ["Tom Kirchner <[email protected]>"]
 license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 envy = "0.4"

sources/growpart/Cargo.toml

@@ -5,6 +5,8 @@ authors = ["Ben Cressey <[email protected]>"]
 license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 gptman = { version = "0.6.1", default-features = false }

sources/logdog/Cargo.toml

@@ -5,6 +5,8 @@ authors = ["Matt Briggs <[email protected]>"]
 license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 flate2 = "1.0"

sources/models/Cargo.toml

@@ -6,6 +6,8 @@ license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
 build = "build.rs"
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 base64 = "0.12"

sources/models/model-derive/Cargo.toml

@@ -6,6 +6,8 @@ license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
 build = "build.rs"
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [lib]
 path = "src/lib.rs"

sources/parse-datetime/Cargo.toml

@@ -5,6 +5,8 @@ authors = ["Zac Mrowicki <[email protected]>"]
 license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 chrono = "0.4.11"

sources/updater/block-party/Cargo.toml

@@ -5,6 +5,8 @@ authors = ["iliana destroyer of worlds <[email protected]>"]
 license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 snafu = "0.6.0"

sources/updater/signpost/Cargo.toml

@@ -5,6 +5,8 @@ authors = ["iliana destroyer of worlds <[email protected]>"]
 license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 bit_field = "0.10.0"

sources/updater/update_metadata/Cargo.toml

@@ -5,6 +5,8 @@ authors = ["Samuel Mendoza-Jonas <[email protected]>"]
 license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 chrono = { version = "0.4.9", features = ["serde"] }

sources/updater/updog/Cargo.toml

@@ -5,6 +5,8 @@ authors = ["iliana destroyer of worlds <[email protected]>"]
 license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 bottlerocket-release = { path = "../../bottlerocket-release" }

sources/webpki-roots-shim/Cargo.toml

@@ -5,6 +5,8 @@ authors = ["iliana destroyer of worlds <[email protected]>"]
 license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 lazy_static = "1.4.0"

tools/buildsys/Cargo.toml

@@ -5,6 +5,8 @@ authors = ["Ben Cressey <[email protected]>"]
 license = "Apache-2.0 OR MIT"
 edition = "2018"
 publish = false
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [dependencies]
 duct = "0.13.0"

variants/aws-dev/Cargo.toml

@@ -4,6 +4,8 @@ version = "0.1.0"
 edition = "2018"
 publish = false
 build = "build.rs"
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [package.metadata.build-variant]
 included-packages = [

variants/aws-k8s-1.15/Cargo.toml

@@ -6,6 +6,8 @@ version = "0.1.0"
 edition = "2018"
 publish = false
 build = "build.rs"
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [package.metadata.build-variant]
 included-packages = [

variants/aws-k8s-1.16/Cargo.toml

@@ -6,6 +6,8 @@ version = "0.1.0"
 edition = "2018"
 publish = false
 build = "build.rs"
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [package.metadata.build-variant]
 included-packages = [

variants/aws-k8s-1.17/Cargo.toml

@@ -6,6 +6,8 @@ version = "0.1.0"
 edition = "2018"
 publish = false
 build = "build.rs"
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
 
 [package.metadata.build-variant]
 included-packages = [