Strip symbols and enable LTO when building using the release profile

This shrinks the size of the resulting binaries by a fairly significant amount. This requires bumping the MSRV to 1.59, however.

Author: jessebraham

.github/workflows/rust.yml

@@ -37,7 +37,7 @@ jobs:
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: 1.58
+          toolchain: 1.59
           override: true
       - uses: Swatinem/rust-cache@v1
       - uses: actions-rs/cargo@v1

Cargo.toml

@@ -3,3 +3,7 @@ members = [
     "cargo-espflash",
     "espflash",
 ]
+
+[profile.release]
+lto   = "thin"
+strip = true

README.md

@@ -14,7 +14,7 @@ This repository contains two applications:
 | [cargo-espflash] | Cargo subcommand for espflash                               |
 | [espflash]       | Library and `espflash` binary (_without_ Cargo integration) |
 
-> **NOTE:** requires `rustc >= 1.58.0` in order to build either application
+> **NOTE:** requires `rustc >= 1.59.0` in order to build either application
 
 ## Installation
 

cargo-espflash/Cargo.toml

@@ -6,7 +6,7 @@ authors = [
     "Jesse Braham <[email protected]>",
 ]
 edition = "2021"
-rust-version = "1.56"
+rust-version = "1.59"
 description = "Cargo subcommand for flashing Espressif devices over serial"
 repository = "https://github.com/esp-rs/espflash"
 license = "GPL-2.0"

espflash/Cargo.toml

@@ -6,7 +6,7 @@ authors = [
     "Jesse Braham <[email protected]>",
 ]
 edition = "2021"
-rust-version = "1.58"
+rust-version = "1.59"
 description = "A command-line tool for flashing Espressif devices over serial"
 repository = "https://github.com/esp-rs/espflash"
 license = "GPL-2.0"