chore: Merging main branch (#116)

Author: keelerm84

.github/variables/rust-versions.env

@@ -0,0 +1 @@
+target=1.91

.github/workflows/check-rust-versions.yml

@@ -0,0 +1,72 @@
+name: Check Supported Rust Versions
+on:
+  schedule:
+    - cron: "0 17 * * *"
+  workflow_dispatch:
+
+jobs:
+  check-rust-eol:
+    permissions:
+      contents: read
+    runs-on: ubuntu-latest
+    outputs:
+      target: ${{ steps.parse.outputs.target }}
+    timeout-minutes: 2
+    steps:
+      - uses: actions/checkout@v4
+        # Perform a GET request to endoflife.date for the Rust language. The response
+        # contains all Rust releases; we're interested in the 2nd index (antepenultimate).
+      - name: Fetch officially supported Rust versions
+        uses: JamesIves/fetch-api-data-action@396ebea7d13904824f85b892b1616985f847301c
+        with:
+          endpoint: https://endoflife.date/api/rust.json
+          configuration: '{ "method": "GET" }'
+          debug: true
+        # Parse the response JSON and insert into environment variables for the next step.
+        # We use the antepenultimate (third most recent) version as our target.
+      - name: Parse officially supported Rust versions
+        id: parse
+        run: |
+          echo "target=${{ fromJSON(env.fetch-api-data)[2].cycle }}" >> $GITHUB_OUTPUT
+
+  create-prs:
+    permissions:
+      contents: write
+      pull-requests: write
+    needs: check-rust-eol
+    runs-on: ubuntu-latest
+    env:
+      officialTargetVersion: ${{ needs.check-rust-eol.outputs.target }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Get current Rust version
+        id: rust-versions
+        run: cat ./.github/variables/rust-versions.env >> $GITHUB_OUTPUT
+
+      - name: Update rust-versions.env and Cargo.toml
+        if: steps.rust-versions.outputs.target != env.officialTargetVersion
+        id: update-rust-versions
+        run: |
+          # Update the versions file
+          sed -i -e "s#target=[^ ]*#target=${{ env.officialTargetVersion }}#g" \
+                  ./.github/variables/rust-versions.env
+
+          # Update Cargo.toml rust-version field
+          sed -i -e "s#rust-version = \"[^\"]*\"#rust-version = \"${{ env.officialTargetVersion }}.0\"#g" \
+                  ./eventsource-client/Cargo.toml
+
+      - name: Create pull request
+        if: steps.update-rust-versions.outcome == 'success'
+        uses: peter-evans/create-pull-request@c0f553fe549906ede9cf27b5156039d195d2ece0
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          add-paths: |
+            .github/variables/rust-versions.env
+            eventsource-client/Cargo.toml
+          branch: "launchdarklyreleasebot/update-to-rust${{ env.officialTargetVersion }}"
+          author: "LaunchDarklyReleaseBot <LaunchDarklyReleaseBot@launchdarkly.com>"
+          committer: "LaunchDarklyReleaseBot <LaunchDarklyReleaseBot@launchdarkly.com>"
+          title: "fix: Bump MSRV from ${{ steps.rust-versions.outputs.target }} to ${{ env.officialTargetVersion }}"
+          body: |
+            - [ ] I have triggered CI on this PR (either close & reopen this PR in Github UI, or `git commit -m "run ci" --allow-empty && git push`)

.github/workflows/ci.yml

@@ -22,9 +22,13 @@ jobs:
         with:
           fetch-depth: 0 # If you only need the current version keep this.
 
+      - name: Get Rust version
+        id: rust-version
+        run: cat ./.github/variables/rust-versions.env >> $GITHUB_OUTPUT
+
       - name: Setup rust tooling
         run: |
-          rustup override set 1.83
+          rustup override set ${{ steps.rust-version.outputs.target }}
           rustup component add rustfmt clippy
 
       - uses: ./.github/actions/ci

.github/workflows/manual-publish.yml

@@ -17,9 +17,13 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Get Rust version
+        id: rust-version
+        run: cat ./.github/variables/rust-versions.env >> $GITHUB_OUTPUT
+
       - name: Setup rust tooling
         run: |
-          rustup override set 1.83
+          rustup override set ${{ steps.rust-version.outputs.target }}
           rustup component add rustfmt clippy
 
       - uses: ./.github/actions/ci

.github/workflows/release-please.yml

@@ -22,10 +22,15 @@ jobs:
         with:
           fetch-depth: 0 # If you only need the current version keep this.
 
+      - name: Get Rust version
+        if: ${{ steps.release.outputs['eventsource-client--release_created'] == 'true' }}
+        id: rust-version
+        run: cat ./.github/variables/rust-versions.env >> $GITHUB_OUTPUT
+
       - name: Setup rust tooling
         if: ${{ steps.release.outputs['eventsource-client--release_created'] == 'true' }}
         run: |
-          rustup override set 1.83
+          rustup override set ${{ steps.rust-version.outputs.target }}
           rustup component add rustfmt clippy
 
       - uses: launchdarkly/gh-actions/actions/release-secrets@release-secrets-v1.2.0

.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  "eventsource-client": "0.16.0"
+  "eventsource-client": "0.16.1"
 }

README.md

@@ -47,6 +47,6 @@ issues. API subject to change.
 
 ## Minimum Supported Rust Version
 
-This project aims to maintain compatibility with a Rust version that is at least six months old.
+This project aims to maintain compatibility with the latest stable release of Rust in addition to the two prior minor releases.
 
 Version updates may occur more frequently than the policy guideline states if external forces require it. For example, a CVE in a downstream dependency requiring an MSRV bump would be considered an acceptable reason to violate the six month guideline.

eventsource-client/CHANGELOG.md

@@ -2,6 +2,14 @@
 
 All notable changes to the project will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org).
 
+## [0.16.1](https://github.com/launchdarkly/rust-eventsource-client/compare/0.16.0...0.16.1) (2026-01-26)
+
+
+### Bug Fixes
+
+* Bump MSRV from 1.83 to 1.88 ([#110](https://github.com/launchdarkly/rust-eventsource-client/issues/110)) ([94cdd71](https://github.com/launchdarkly/rust-eventsource-client/commit/94cdd716bbcf0fc552b7a470142ccad9149848aa))
+* Bump MSRV from 1.88 to 1.91 ([#112](https://github.com/launchdarkly/rust-eventsource-client/issues/112)) ([78423ab](https://github.com/launchdarkly/rust-eventsource-client/commit/78423abfa406550d9270fba33aebc25e257b0216))
+
 ## [0.16.0](https://github.com/launchdarkly/rust-eventsource-client/compare/0.15.1...0.16.0) (2025-12-17)
 
 

eventsource-client/Cargo.toml

@@ -1,11 +1,11 @@
 [package]
 name = "eventsource-client"
-version = "0.16.0"
+version = "0.16.1"
 description = "Client for the Server-Sent Events protocol (aka EventSource)"
 repository = "https://github.com/launchdarkly/rust-eventsource-client"
 authors = ["LaunchDarkly"]
 edition = "2021"
-rust-version = "1.83.0"
+rust-version = "1.91.0"
 license = "Apache-2.0"
 keywords = ["launchdarkly", "feature-flags", "feature-toggles", "eventsource", "server-sent-events"]
 exclude = ["CHANGELOG.md"]

eventsource-client/examples/tail.rs

@@ -18,6 +18,7 @@ use std::{env, process, time::Duration};
 use eventsource_client as es;
 
 #[tokio::main]
+#[allow(clippy::result_large_err)]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
     env_logger::init();