From 2a200d8525bcf7aca1862661e0e80daa709da17f Mon Sep 17 00:00:00 2001
From: Clint J Edwards <clint.edwards@fastly.com>
Date: Wed, 16 Sep 2026 19:47:59 -0600
Subject: [PATCH] [release] Allow build version to be injected at compile time

This adds a new build envvar that will overwrite the default `CARGO_PKG_VERSION`
and removes some of the logic we were using to generate unique build versions
for dev versions.

In short:

* We introduce a new `PUSHPIN_BUILD_VERSION` environment variable (prefixed
to not collide with CI env vars) that we use whenever we want to overwrite
the build version listed in `cargo.toml`.
* Building the normal way (`cargo build --release`) without any extra envvars
still uses the version in `cargo.toml` as the version.
* This allows us some flexibility when building final assets as to what the
version string actually gets set as. Very useful when hotfixing, for downstream
forks, or just generally doing things that need the version string to change but don't want `cargo.toml`
to be updated. (Things like appending the date to the build version and such)
* This PR also cleans up the `-dev` logic for appending dates since we're moving away
from explicitly tagging out of band release builds with a `-dev` suffix.
---
 build.rs | 20 +++++---------------
 1 file changed, 5 insertions(+), 15 deletions(-)

diff --git a/build.rs b/build.rs
index d2fd634c..869fbf51 100644
--- a/build.rs
+++ b/build.rs
@@ -9,31 +9,20 @@ use std::os::unix::ffi::OsStrExt;
 use std::path::{Path, PathBuf};
 use std::process::{Command, ExitStatus, Output, Stdio};
 use std::str::FromStr;
-use time::macros::format_description;
-use time::OffsetDateTime;
 
 const DEFAULT_PREFIX: &str = "/usr/local";
 
 fn get_version() -> String {
-    let mut version = env!("CARGO_PKG_VERSION").to_string();
-
-    if version.ends_with("-dev") {
-        let format = format_description!("[year][month][day]");
-
-        let date_str = OffsetDateTime::now_utc().format(&format).unwrap();
-
-        version.push_str(&format!("-{}", date_str));
-    }
-
-    version
+    env::var("PUSHPIN_BUILD_VERSION").unwrap_or_else(|_| env!("CARGO_PKG_VERSION").to_string())
 }
 
 fn get_version_int() -> Result<u32, Box<dyn Error>> {
-    let version = env!("CARGO_PKG_VERSION");
+    let version =
+        env::var("PUSHPIN_BUILD_VERSION").unwrap_or_else(|_| env!("CARGO_PKG_VERSION").to_string());
 
     let version = match version.find('-') {
         Some(pos) => &version[..pos],
-        None => version,
+        None => &version,
     };
 
     let mut v = 0;
@@ -614,6 +603,7 @@ fn main() -> Result<(), Box<dyn Error>> {
         println!("cargo:rustc-link-search={}", qt_install_libs.display());
     }
 
+    println!("cargo:rerun-if-env-changed=PUSHPIN_BUILD_VERSION");
     println!("cargo:rerun-if-env-changed=RELEASE");
     println!("cargo:rerun-if-env-changed=PREFIX");
     println!("cargo:rerun-if-env-changed=BINDIR");