Increase minimum supported Rust version (MSRV) to 1.79 (apache#12962)

Current goal is to support four last stable versions or versions for 4
months whichever is lower.  Given 1.78.0 was released on: 2 May, 2024,
it does not need to be supported.

.github/workflows/rust.yml

@@ -574,9 +574,9 @@ jobs:
           #
           # To reproduce: 
           # 1. Install the version of Rust that is failing. Example: 
-          #    rustup install 1.78.0
+          #    rustup install 1.79.0
           # 2. Run the command that failed with that version. Example:
-          #    cargo +1.78.0 check -p datafusion
+          #    cargo +1.79.0 check -p datafusion
           # 
           # To resolve, either:
           # 1. Change your code to use older Rust features, 

Cargo.toml

@@ -58,7 +58,7 @@ homepage = "https://datafusion.apache.org"
 license = "Apache-2.0"
 readme = "README.md"
 repository = "https://github.com/apache/datafusion"
-rust-version = "1.78"
+rust-version = "1.79"
 version = "42.0.0"
 
 [workspace.dependencies]

datafusion-cli/Cargo.toml

@@ -26,7 +26,7 @@ license = "Apache-2.0"
 homepage = "https://datafusion.apache.org"
 repository = "https://github.com/apache/datafusion"
 # Specify MSRV here as `cargo msrv` doesn't support workspace version
-rust-version = "1.78"
+rust-version = "1.79"
 readme = "README.md"
 
 [dependencies]

datafusion-cli/Dockerfile

@@ -15,7 +15,7 @@
 # specific language governing permissions and limitations
 # under the License.
 
-FROM rust:1.78-bookworm AS builder
+FROM rust:1.79-bookworm AS builder
 
 COPY . /usr/src/datafusion
 COPY ./datafusion /usr/src/datafusion/datafusion

datafusion/core/Cargo.toml

@@ -30,7 +30,7 @@ authors = { workspace = true }
 # Specify MSRV here as `cargo msrv` doesn't support workspace version and fails with
 # "Unable to find key 'package.rust-version' (or 'package.metadata.msrv') in 'arrow-datafusion/Cargo.toml'"
 # https://github.com/foresterre/cargo-msrv/issues/590
-rust-version = "1.78"
+rust-version = "1.79"
 
 [lints]
 workspace = true

datafusion/proto-common/Cargo.toml

@@ -26,7 +26,7 @@ homepage = { workspace = true }
 repository = { workspace = true }
 license = { workspace = true }
 authors = { workspace = true }
-rust-version = "1.78"
+rust-version = "1.79"
 
 # Exclude proto files so crates.io consumers don't need protoc
 exclude = ["*.proto"]

datafusion/proto-common/gen/Cargo.toml

@@ -20,7 +20,7 @@ name = "gen-common"
 description = "Code generation for proto"
 version = "0.1.0"
 edition = { workspace = true }
-rust-version = "1.78"
+rust-version = "1.79"
 authors = { workspace = true }
 homepage = { workspace = true }
 repository = { workspace = true }

datafusion/proto/Cargo.toml

@@ -27,7 +27,7 @@ repository = { workspace = true }
 license = { workspace = true }
 authors = { workspace = true }
 # Specify MSRV here as `cargo msrv` doesn't support workspace version
-rust-version = "1.78"
+rust-version = "1.79"
 
 # Exclude proto files so crates.io consumers don't need protoc
 exclude = ["*.proto"]

datafusion/proto/gen/Cargo.toml

@@ -20,7 +20,7 @@ name = "gen"
 description = "Code generation for proto"
 version = "0.1.0"
 edition = { workspace = true }
-rust-version = "1.78"
+rust-version = "1.79"
 authors = { workspace = true }
 homepage = { workspace = true }
 repository = { workspace = true }

datafusion/substrait/Cargo.toml

@@ -26,7 +26,7 @@ repository = { workspace = true }
 license = { workspace = true }
 authors = { workspace = true }
 # Specify MSRV here as `cargo msrv` doesn't support workspace version
-rust-version = "1.78"
+rust-version = "1.79"
 
 [lints]
 workspace = true