add VERSION and GIT_COMMIT_SHA_SHORT constants

These are useful for logging the ipmpsc version in an application.

Author: dicej

Cargo.toml

@@ -6,22 +6,24 @@ repository = "https://github.com/dicej/ipmpsc"
 documentation = "https://docs.rs/ipmpsc/"
 keywords = ["ipc", "shared"]
 license = "MIT"
-version = "0.3.1"
+version = "0.3.2"
 authors = ["Joel Dice <[email protected]>"]
 edition = "2018"
 include = [ "Cargo.toml", "LICENSE.md", "README.md", "src/**/*", "examples/**/*" ]
 
 [dependencies]
-serde = "1"
+serde = { version = "1", features = ["derive"] }
 bincode = "1"
 tempfile = "3"
 memmap = "0.7"
 libc = "0.2"
 thiserror = "1"
-serde_derive = "1"
 
 [dev-dependencies]
 anyhow = "1"
 proptest = "0.9"
 clap = "2"
 serde_bytes = "0.11"
+
+[build-dependencies]
+vergen = "3"

build.rs

@@ -0,0 +1,6 @@
+use std::error::Error;
+use vergen::ConstantsFlags;
+
+fn main() -> Result<(), Box<dyn Error>> {
+    vergen::generate_cargo_keys(ConstantsFlags::all())
+}

src/lib.rs

@@ -7,11 +7,6 @@
 
 #![deny(warnings)]
 
-#[cfg(test)]
-#[allow(unused_imports)]
-#[macro_use]
-extern crate serde_derive;
-
 use memmap::MmapMut;
 use serde::{Deserialize, Serialize};
 use std::{
@@ -28,6 +23,10 @@ use std::{
 use tempfile::NamedTempFile;
 use thiserror::Error as ThisError;
 
+pub const VERSION: &str = env!("CARGO_PKG_VERSION");
+
+pub const GIT_COMMIT_SHA_SHORT: &str = env!("VERGEN_SHA_SHORT");
+
 const BEGINNING: u32 = mem::size_of::<Header>() as u32;
 
 const DECADE_SECS: u64 = 60 * 60 * 24 * 365 * 10;