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WalkthroughA new blog example application is introduced, featuring a Go-based HTTP server, templated views, Tailwind CSS integration, and static asset embedding. The changes include setup files, code generation utilities, a Tailwind configuration, reusable CSS class definitions, and a README with usage instructions. All necessary components for running and building the example are provided. Changes
Sequence Diagram(s)sequenceDiagram
participant User
participant HTTPServer
participant ViewTemplate
participant StaticAssets
User->>HTTPServer: Sends HTTP request (e.g., "/")
HTTPServer->>ViewTemplate: Renders blog view
ViewTemplate-->>HTTPServer: Returns HTML content
HTTPServer-->>User: Serves HTML response
User->>HTTPServer: Requests static asset (e.g., "/static/style.css")
HTTPServer->>StaticAssets: Reads embedded asset
StaticAssets-->>HTTPServer: Returns asset data
HTTPServer-->>User: Serves static file
sequenceDiagram
participant Developer
participant CodeGenTool
participant TailwindCLI
Developer->>CodeGenTool: Run code generation (gen.go)
CodeGenTool->>CodeGenTool: Generate Go code, HTML, and CSS input
CodeGenTool->>TailwindCLI: Run Tailwind to build CSS
TailwindCLI-->>CodeGenTool: Outputs compiled CSS
CodeGenTool-->>Developer: Build complete, ready to run server
Warning There were issues while running some tools. Please review the errors and either fix the tool's configuration or disable the tool if it's a critical failure. 🔧 golangci-lint (1.64.8)level=warning msg="[runner] Can't run linter goanalysis_metalinter: buildir: failed to load package : could not load export data: no export data for "github.com/conneroisu/twerge"" ✨ Finishing Touches
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Actionable comments posted: 4
🧹 Nitpick comments (8)
examples/blog/_static/doc.go (1)
6-7: Verify embed patterns for static assetsThe
//go:embed dist/*directive only captures files directly underdist. If your build produces nested directories, switch to a recursive pattern (e.g.,//go:embed dist/**).examples/blog/README.md (2)
10-10: Add a Prerequisites sectionBefore “## Setup and Running,” list required tools (Go ≥1.24, Node.js/Tailwind CLI,
templCLI) so users know what to install upfront.
23-23: Replace bare URL with markdown linkWrap the URL or use a link to satisfy MD034 (no-bare-urls). For example:
Open your browser and navigate to [http://localhost:8080](http://localhost:8080)🧰 Tools
🪛 markdownlint-cli2 (0.17.2)
23-23: Bare URL used
null(MD034, no-bare-urls)
examples/blog/gen.go (1)
51-63: Document external dependency requirement.The
runTailwind()function assumes thetailwindcssCLI is available in PATH. Consider adding a dependency check or documenting this requirement in the README.func runTailwind() { start := time.Now() defer func() { elapsed := time.Since(start) fmt.Printf("(tailwind) Done in %s.\n", elapsed) }() + // Check if tailwindcss is available + if _, err := exec.LookPath("tailwindcss"); err != nil { + panic("tailwindcss CLI not found in PATH. Please install it first.") + } cmd := exec.Command("tailwindcss", "-i", "input.css", "-o", "_static/dist/styles.css")examples/blog/views/view.templ (1)
58-58: Update copyright year to reflect current year.The copyright year is set to 1999, which seems incorrect for a new example. Consider updating to the current year or using a more appropriate date.
- © 1999 twerge blog. All rights reserved. + © 2024 twerge blog. All rights reserved.examples/blog/input.css (1)
5-113: Fix inconsistent indentation in generated CSS classes.The generated CSS classes have inconsistent indentation - some use tabs (lines 8-10) while others use spaces (lines 94, 99, 104, 109). Consider standardizing to either tabs or spaces throughout.
Example of inconsistency:
- Lines 8-10: Use tabs for indentation
- Lines 94, 99, 104, 109: Use spaces for indentation
Since this is generated code, the fix should be applied in the generation tool to ensure consistency.
examples/blog/main.go (2)
24-32: Good timeout configuration practices.The timeout values are reasonable for a web server. Consider making the host configurable via environment variables for different deployment environments.
const ( - defaultHost = "0.0.0.0" + defaultHost = "localhost" // More secure default, bind to all interfaces only when needed defaultPort = "8080"
46-46: Remove unused parameter.The second parameter in the Run function is never used. Consider removing it or documenting its intended purpose.
func Run( ctx context.Context, - _ func(string) string, ) error {
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
⛔ Files ignored due to path filters (2)
examples/blog/_static/dist/styles.cssis excluded by!**/dist/**examples/blog/go.sumis excluded by!**/*.sum
📒 Files selected for processing (10)
examples/blog/README.md(1 hunks)examples/blog/_static/doc.go(1 hunks)examples/blog/classes/classes.go(1 hunks)examples/blog/classes/classes.html(1 hunks)examples/blog/gen.go(1 hunks)examples/blog/go.mod(1 hunks)examples/blog/input.css(1 hunks)examples/blog/main.go(1 hunks)examples/blog/tailwind.config.js(1 hunks)examples/blog/views/view.templ(1 hunks)
🧰 Additional context used
🧬 Code Graph Analysis (2)
examples/blog/classes/classes.go (2)
examples/dashboard/classes/classes.go (2)
SetCache(6-8)ClassMapStr(10-299)twerge.go (3)
Default(35-35)Handler(72-76)CacheValue(17-26)
examples/blog/gen.go (2)
tw.go (1)
CodeGen(26-56)twerge.go (1)
Default(35-35)
🪛 markdownlint-cli2 (0.17.2)
examples/blog/README.md
23-23: Bare URL used
null
(MD034, no-bare-urls)
⏰ Context from checks skipped due to timeout of 90000ms (1)
- GitHub Check: checks
🔇 Additional comments (13)
examples/blog/go.mod (1)
1-6: Approve Go module setupThe
go.modcorrectly declares the module path and pins thetempldependency. Remember to rungo mod tidyafter merging to clean up any unused entries.examples/blog/classes/classes.html (1)
1-25: Skip review for generated fileThis HTML is auto-generated by
twerge(devel)and should not be edited manually.examples/blog/tailwind.config.js (1)
1-8: Approve Tailwind configurationThe content purge target is correctly set to
./classes/classes.htmland the default theme/plugins are maintained. Ensure this covers all utility classes used at runtime.examples/blog/classes/classes.go (2)
1-8: LGTM! Generated code follows expected pattern.The generated code structure correctly implements the twerge caching pattern, with appropriate "DO NOT EDIT" warnings and proper function signature matching the Handler interface.
10-95:Details
✅ Verification successful
Verify consistency between generated mappings and CSS classes.
The class mappings look well-structured, but ensure the Generated field values (tw-0 through tw-20) align with the CSS class definitions in the input.css file.
🏁 Script executed:
#!/bin/bash # Description: Verify that all generated class names in the Go cache map have corresponding CSS definitions # Extract generated class names from the cache map rg -o '"tw-\d+"' examples/blog/classes/classes.go | sort -u > /tmp/go_classes.txt # Extract CSS class names from input.css rg -o '\.tw-\d+' examples/blog/input.css | sed 's/\.//' | sort -u > /tmp/css_classes.txt # Compare the two lists echo "Generated classes in Go file:" cat /tmp/go_classes.txt echo -e "\nCSS classes in input.css:" cat /tmp/css_classes.txt echo -e "\nMissing in CSS (should be empty):" comm -23 /tmp/go_classes.txt /tmp/css_classes.txt echo -e "\nMissing in Go cache (should be empty):" comm -13 /tmp/go_classes.txt /tmp/css_classes.txtLength of output: 1064
🏁 Script executed:
#!/bin/bash # Re-verify that all generated class names in the Go cache map have corresponding CSS definitions using grep # Extract generated class names from the Go cache map rg -o '"tw-[0-9]\+"' examples/blog/classes/classes.go | sort -u > /tmp/go_classes.txt # Extract CSS class names from input.css (strip leading dot) rg -o '\.tw-[0-9]\+' examples/blog/input.css | sed 's/\.//' | sort -u > /tmp/css_classes.txt # Compare lists echo "Missing in CSS (defined in Go but not in CSS):" grep -Fxv -f /tmp/css_classes.txt /tmp/go_classes.txt || echo " (none)" echo -e "\nMissing in Go (defined in CSS but not in Go):" grep -Fxv -f /tmp/go_classes.txt /tmp/css_classes.txt || echo " (none)"Length of output: 513
Generated class mappings are fully consistent with CSS definitions
Verified that every
Generatedidentifier (tw-0throughtw-20) inexamples/blog/classes/classes.gohas a matching rule inexamples/blog/input.css. No missing or extra entries were found—no further action required.examples/blog/gen.go (2)
1-3: LGTM! Proper build constraints for generation tool.The build constraints correctly prevent this tool from being included in normal builds while allowing it to be executed via
go run.
34-42:Details
❓ Verification inconclusive
Verify template component rendering and file paths.
The code generation call looks correct, but ensure that the
views.View()component can be rendered and that the hardcoded file paths exist in the expected locations.
🏁 Script executed:
#!/bin/bash # Description: Verify the generated view component exists and file paths are valid # Check if the view component file exists echo "Checking for view component files:" fd -t f "view.*\.go$" examples/blog/views/ # Check if the target directories exist for generated files echo -e "\nChecking target directories:" [ -d "examples/blog/classes" ] && echo "✓ classes/ directory exists" || echo "✗ classes/ directory missing" # Check if input.css exists [ -f "examples/blog/input.css" ] && echo "✓ input.css exists" || echo "✗ input.css missing" # Verify the view template can be found echo -e "\nSearching for View template definition:" rg -A 5 "func View\(\)" examples/blog/views/Length of output: 522
🏁 Script executed:
#!/bin/bash # Re-verify the contents of examples/blog/views and presence of View() echo "Checking if views directory exists:" if [ -d "examples/blog/views" ]; then echo "✓ examples/blog/views exists" else echo "✗ examples/blog/views is missing" exit 1 fi echo -e "\nListing all files under examples/blog/views:" find examples/blog/views -maxdepth 1 -type f -print || echo "Failed to list files" echo -e "\nListing all Go source files under examples/blog/views:" find examples/blog/views -type f -name '*.go' -print echo -e "\nSearching for 'func View' definition:" rg -n "func View" examples/blog/views echo -e "\nSearching for any View references in the package:" rg -n "View\(" examples/blog/viewsLength of output: 887
Ensure the
views.View()function is defined in theexamples/blog/viewspackageThe codegen call in
examples/blog/gen.go(lines 34–42) referencesviews.View(), butexamples/blog/viewsonly containsview.templ—no Go source definesfunc View(). To fix:• Add or generate a Go file in
examples/blog/views(e.g.view.go) with:package views // View returns the rendered template or component for your blog. func View() /* return type */ { // implementation or call into your templating engine }• If you rely on your templ tool to convert
view.templinto Go code, run or include that code‐generation step so thatfunc View()is present at build time.• Re-run
go build(or your templ generator) inexamples/blog/viewsand confirm thatviews.View()compiles and returns the expected template.fix_required
examples/blog/views/view.templ (2)
5-13: LGTM! Proper HTML5 structure with semantic elements.The document structure follows HTML5 best practices with proper meta tags, title, and viewport configuration.
12-12:Details
✅ Verification successful
Verify CSS resource path consistency.
The stylesheet reference uses
/dist/styles.cssbut the generation tool outputs to_static/dist/styles.css. Ensure the server properly maps these paths.
🏁 Script executed:
#!/bin/bash # Description: Check CSS output path consistency between template and generation tool echo "CSS reference in template:" rg 'href="/dist/styles\.css"' examples/blog/views/view.templ echo -e "\nCSS output path in generation tool:" rg '_static/dist/styles\.css' examples/blog/gen.go echo -e "\nCheck if server maps /dist to _static/dist:" rg -A 5 -B 5 '/dist|_static' examples/blog/main.goLength of output: 1061
✅ CSS resource path mapping confirmed.
The template’s<link href="/dist/styles.css">, the Tailwind output to_static/dist/styles.css, and the server routemux.Handle("/dist/", http.FileServer(http.FS(static.Assets)))all align correctly. No further changes needed.
examples/blog/input.css (2)
1-4: LGTM! Proper Tailwind CSS imports.The standard Tailwind CSS imports are correctly structured to include base styles, components, and utilities.
8-110:Details
❓ Verification inconclusive
Verify CSS class definitions match the Go cache mappings.
The CSS class names and their utility combinations should align with the cache mappings in
classes.go. Ensure the@applydirectives use the same utility order as theMergedfield in the cache.
🏁 Script executed:
#!/bin/bash # Description: Compare CSS class utilities with Go cache Merged field values echo "Extracting utility classes from CSS @apply directives:" rg -A 1 '\.tw-\d+' examples/blog/input.css | rg '@apply' | sed 's/.*@apply\s*//' | sed 's/\s*;.*//' > /tmp/css_utilities.txt echo -e "\nExtracting Merged values from Go cache:" rg 'Merged:\s*"[^"]*"' examples/blog/classes/classes.go | sed 's/.*Merged:\s*"//' | sed 's/".*//' > /tmp/go_utilities.txt echo -e "\nComparing utility combinations (should match when sorted):" echo "CSS utilities:" cat /tmp/css_utilities.txt | head -5 echo -e "\nGo cache Merged values:" cat /tmp/go_utilities.txt | head -5 echo -e "\nChecking for mismatches:" paste -d'|' /tmp/css_utilities.txt /tmp/go_utilities.txt | while IFS='|' read css_utils go_utils; do css_sorted=$(echo "$css_utils" | tr ' ' '\n' | sort | tr '\n' ' ' | sed 's/ $//') go_sorted=$(echo "$go_utils" | tr ' ' '\n' | sort | tr '\n' ' ' | sed 's/ $//') if [ "$css_sorted" != "$go_sorted" ]; then echo "MISMATCH:" echo " CSS: $css_utils" echo " Go: $go_utils" fi doneLength of output: 1382
Verify class mappings between CSS and Go cache for each
tw-<id>#!/bin/bash echo "Checking mismatches between CSS and Go mappings for tw-0 to tw-20:" for id in {0..20}; do css=$(grep -A1 "^\.tw-$id " -n examples/blog/input.css \ | grep "@apply" \ | sed -E 's/.*@apply (.*);/\1/') go=$(awk '/case "'"$id"'":/{getline; if(/Merged:/){gsub(/.*Merged: "([^"]+)".*/,"\\1",$0); print}}' \ examples/blog/classes/classes.go) if [ -z "$css" ] || [ -z "$go" ]; then echo " tw-$id: missing CSS or Go mapping" continue fi css_sorted=$(echo "$css" | tr ' ' '\n' | sort | tr '\n' ' ' | sed 's/ $//') go_sorted=$(echo "$go" | tr ' ' '\n' | sort | tr '\n' ' ' | sed 's/ $//') if [ "$css_sorted" != "$go_sorted" ]; then echo "MISMATCH for tw-$id:" echo " CSS: $css" echo " Go: $go" fi doneRun this script to pinpoint any
tw-<id>entries whose utility sets differ betweenexamples/blog/input.cssand theMergedfield inexamples/blog/classes/classes.go. Resolve any mismatches so that each CSS class’s@applyutilities exactly match the corresponding Go cache mapping.examples/blog/main.go (2)
1-22: LGTM! Clean package structure and imports.The package declaration and imports are well-organized and appropriate for an HTTP server application.
169-173: LGTM! Clean main function.The main function is appropriately simple and follows Go conventions.
| </div> | ||
| </footer> | ||
| <!-- Custom JavaScript --> | ||
| <script src="/static/js/main.js"></script> |
There was a problem hiding this comment.
💡 Verification agent
🧩 Analysis chain
Verify JavaScript file exists and path mapping.
The template references /static/js/main.js but it's unclear if this file exists or if the path is properly mapped by the server.
🏁 Script executed:
#!/bin/bash
# Description: Check if the referenced JavaScript file exists and verify path mapping
echo "JavaScript reference in template:"
rg 'src="/static/js/main\.js"' examples/blog/views/view.templ
echo -e "\nSearching for main.js file:"
fd "main\.js" examples/blog/
echo -e "\nChecking static file mappings in server:"
rg -A 5 -B 5 'static.*js|js.*static' examples/blog/main.go
echo -e "\nChecking _static directory structure:"
fd -t f "\.js$" examples/blog/_static/ 2>/dev/null || echo "No JS files found in _static/"Length of output: 578
🏁 Script executed:
#!/bin/bash
# Search for main.js anywhere in the repository
echo "=== Searching for main.js files ==="
fd "main\.js" .
# List all directories named 'static'
echo -e "\n=== Listing 'static' directories ==="
fd -t d --ignore-case static .
# List all .js files under any 'static' directory
echo -e "\n=== Listing .js files inside 'static' directories ==="
find . -type f -path "*/static/*" -name "*.js"
# Search for Go HTTP static file server setup
echo -e "\n=== Searching for FileServer usage in Go code ==="
rg -A3 -B3 'FileServer' .
echo -e "\n=== Searching for StripPrefix usage in Go code ==="
rg -A3 -B3 'StripPrefix' .Length of output: 6478
Verify JavaScript asset path and server mapping
The template at examples/blog/views/view.templ (line 63) references /static/js/main.js, but:
- No
main.jsexists in examples/blog/_static (or elsewhere in the repo). - The Go server in examples/blog/main.go only serves embedded assets under the
/dist/prefix (mux.Handle("/dist/", http.FileServer(http.FS(static.Assets)))).
Please either:
- Update the
<script>tag to point to the correct served path (e.g./dist/js/main.js), or - Place your compiled
main.jsunder the_static/js/directory and adjust the server routing to serve/static/.
Suggested change:
- <script src="/static/js/main.js"></script>
+ <script src="/dist/js/main.js"></script>📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| <script src="/static/js/main.js"></script> | |
| <script src="/dist/js/main.js"></script> |
🤖 Prompt for AI Agents
In examples/blog/views/view.templ at line 63, the script tag references
/static/js/main.js, but this file does not exist and the server only serves
static files under the /dist/ prefix. To fix this, update the script src
attribute to /dist/js/main.js to match the server's static file serving path,
ensuring the JavaScript file is correctly loaded.
| classes.SetCache() | ||
| mux := http.NewServeMux() | ||
| err := AddRoutes(mux) | ||
| if err != nil { | ||
| slog.Error("error adding routes", slog.String("error", err.Error())) | ||
| log.Fatal(err) | ||
| } |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Remove unnecessary error handling after AddRoutes simplification.
Since AddRoutes no longer returns an error, this error handling can be removed.
classes.SetCache()
mux := http.NewServeMux()
- err := AddRoutes(mux)
- if err != nil {
- slog.Error("error adding routes", slog.String("error", err.Error()))
- log.Fatal(err)
- }
+ AddRoutes(mux)📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| classes.SetCache() | |
| mux := http.NewServeMux() | |
| err := AddRoutes(mux) | |
| if err != nil { | |
| slog.Error("error adding routes", slog.String("error", err.Error())) | |
| log.Fatal(err) | |
| } | |
| classes.SetCache() | |
| mux := http.NewServeMux() | |
| AddRoutes(mux) |
🤖 Prompt for AI Agents
In examples/blog/main.go around lines 66 to 72, the AddRoutes function no longer
returns an error, so the existing error handling after calling AddRoutes is
unnecessary. Remove the error variable declaration, the if statement checking
for the error, and the associated logging and fatal calls to simplify the code.
| // AddRoutes adds routes to the mux | ||
| func AddRoutes( | ||
| mux *http.ServeMux, | ||
| ) error { | ||
| mux.Handle("/{$}", templ.Handler(views.View())) | ||
| mux.Handle("/dist/", http.FileServer(http.FS(static.Assets))) | ||
| return nil | ||
| } |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Simplify the AddRoutes function.
The function always returns nil, making the error return unnecessary. Also, there's a mismatch between the route /dist/ and the documentation that mentions /static/.
-// AddRoutes adds routes to the mux
-func AddRoutes(
- mux *http.ServeMux,
-) error {
+// AddRoutes adds routes to the mux
+func AddRoutes(mux *http.ServeMux) {
mux.Handle("/{$}", templ.Handler(views.View()))
mux.Handle("/dist/", http.FileServer(http.FS(static.Assets)))
- return nil
}📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| // AddRoutes adds routes to the mux | |
| func AddRoutes( | |
| mux *http.ServeMux, | |
| ) error { | |
| mux.Handle("/{$}", templ.Handler(views.View())) | |
| mux.Handle("/dist/", http.FileServer(http.FS(static.Assets))) | |
| return nil | |
| } | |
| // AddRoutes adds routes to the mux | |
| func AddRoutes(mux *http.ServeMux) { | |
| mux.Handle("/{$}", templ.Handler(views.View())) | |
| mux.Handle("/dist/", http.FileServer(http.FS(static.Assets))) | |
| } |
🤖 Prompt for AI Agents
In examples/blog/main.go around lines 34 to 41, simplify the AddRoutes function
by removing the error return type since it always returns nil. Also, update the
route from "/dist/" to "/static/" to match the documentation and ensure
consistency. Adjust the mux.Handle call accordingly to serve static assets under
the "/static/" path.
| case <-innerCtx.Done(): | ||
| // Signal received, initiate graceful shutdown | ||
| slog.Info("shutdown signal received, shutting down server...") | ||
|
|
||
| // Create shutdown context with timeout | ||
| shutdownCtx, cancel := context.WithTimeout( | ||
| context.Background(), // Use a fresh context for shutdown | ||
| shutdownTimeout, | ||
| ) | ||
| defer cancel() | ||
|
|
||
| // Attempt graceful shutdown | ||
| err := httpServer.Shutdown(shutdownCtx) | ||
| if err != nil { | ||
| slog.Error("error during server shutdown", | ||
| slog.String("error", err.Error()), | ||
| slog.Duration("timeout", shutdownTimeout), | ||
| ) | ||
| } | ||
|
|
||
| // Wait for all goroutines to finish | ||
| slog.Info("waiting for server shutdown to complete") | ||
| wg.Wait() | ||
| slog.Info("server shutdown completed") | ||
| return nil | ||
| case <-ctx.Done(): | ||
| // Parent context cancelled | ||
| slog.Info("parent context cancelled, shutting down...") | ||
|
|
||
| // Create shutdown context with timeout | ||
| shutdownCtx, cancel := context.WithTimeout( | ||
| context.Background(), // Use a fresh context for shutdown | ||
| shutdownTimeout, | ||
| ) | ||
| defer cancel() | ||
|
|
||
| // Attempt graceful shutdown | ||
| err := httpServer.Shutdown(shutdownCtx) | ||
| if err != nil { | ||
| slog.Error("error during server shutdown", | ||
| slog.String("error", err.Error()), | ||
| slog.Duration("timeout", shutdownTimeout), | ||
| ) | ||
| } | ||
|
|
||
| // Wait for all goroutines to finish | ||
| wg.Wait() | ||
| return nil | ||
| } |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Eliminate duplicate shutdown code.
The shutdown logic for signal handling and parent context cancellation is nearly identical, leading to code duplication.
+ // Helper function for graceful shutdown
+ performShutdown := func(reason string) error {
+ slog.Info(reason)
+ shutdownCtx, cancel := context.WithTimeout(context.Background(), shutdownTimeout)
+ defer cancel()
+
+ err := httpServer.Shutdown(shutdownCtx)
+ if err != nil {
+ slog.Error("error during server shutdown",
+ slog.String("error", err.Error()),
+ slog.Duration("timeout", shutdownTimeout),
+ )
+ }
+ wg.Wait()
+ return nil
+ }
+
// Wait for either server error or shutdown signal
select {
case err := <-serverErrors:
return fmt.Errorf("server error: %w", err)
case <-innerCtx.Done():
- // Signal received, initiate graceful shutdown
- slog.Info("shutdown signal received, shutting down server...")
-
- // Create shutdown context with timeout
- shutdownCtx, cancel := context.WithTimeout(
- context.Background(), // Use a fresh context for shutdown
- shutdownTimeout,
- )
- defer cancel()
-
- // Attempt graceful shutdown
- err := httpServer.Shutdown(shutdownCtx)
- if err != nil {
- slog.Error("error during server shutdown",
- slog.String("error", err.Error()),
- slog.Duration("timeout", shutdownTimeout),
- )
- }
-
- // Wait for all goroutines to finish
- slog.Info("waiting for server shutdown to complete")
- wg.Wait()
- slog.Info("server shutdown completed")
- return nil
+ return performShutdown("shutdown signal received, shutting down server...")
case <-ctx.Done():
- // Parent context cancelled
- slog.Info("parent context cancelled, shutting down...")
-
- // Create shutdown context with timeout
- shutdownCtx, cancel := context.WithTimeout(
- context.Background(), // Use a fresh context for shutdown
- shutdownTimeout,
- )
- defer cancel()
-
- // Attempt graceful shutdown
- err := httpServer.Shutdown(shutdownCtx)
- if err != nil {
- slog.Error("error during server shutdown",
- slog.String("error", err.Error()),
- slog.Duration("timeout", shutdownTimeout),
- )
- }
-
- // Wait for all goroutines to finish
- wg.Wait()
- return nil
+ return performShutdown("parent context cancelled, shutting down...")
}📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| case <-innerCtx.Done(): | |
| // Signal received, initiate graceful shutdown | |
| slog.Info("shutdown signal received, shutting down server...") | |
| // Create shutdown context with timeout | |
| shutdownCtx, cancel := context.WithTimeout( | |
| context.Background(), // Use a fresh context for shutdown | |
| shutdownTimeout, | |
| ) | |
| defer cancel() | |
| // Attempt graceful shutdown | |
| err := httpServer.Shutdown(shutdownCtx) | |
| if err != nil { | |
| slog.Error("error during server shutdown", | |
| slog.String("error", err.Error()), | |
| slog.Duration("timeout", shutdownTimeout), | |
| ) | |
| } | |
| // Wait for all goroutines to finish | |
| slog.Info("waiting for server shutdown to complete") | |
| wg.Wait() | |
| slog.Info("server shutdown completed") | |
| return nil | |
| case <-ctx.Done(): | |
| // Parent context cancelled | |
| slog.Info("parent context cancelled, shutting down...") | |
| // Create shutdown context with timeout | |
| shutdownCtx, cancel := context.WithTimeout( | |
| context.Background(), // Use a fresh context for shutdown | |
| shutdownTimeout, | |
| ) | |
| defer cancel() | |
| // Attempt graceful shutdown | |
| err := httpServer.Shutdown(shutdownCtx) | |
| if err != nil { | |
| slog.Error("error during server shutdown", | |
| slog.String("error", err.Error()), | |
| slog.Duration("timeout", shutdownTimeout), | |
| ) | |
| } | |
| // Wait for all goroutines to finish | |
| wg.Wait() | |
| return nil | |
| } | |
| // Helper function for graceful shutdown | |
| performShutdown := func(reason string) error { | |
| slog.Info(reason) | |
| shutdownCtx, cancel := context.WithTimeout(context.Background(), shutdownTimeout) | |
| defer cancel() | |
| err := httpServer.Shutdown(shutdownCtx) | |
| if err != nil { | |
| slog.Error("error during server shutdown", | |
| slog.String("error", err.Error()), | |
| slog.Duration("timeout", shutdownTimeout), | |
| ) | |
| } | |
| wg.Wait() | |
| return nil | |
| } | |
| // Wait for either server error or shutdown signal | |
| select { | |
| case err := <-serverErrors: | |
| return fmt.Errorf("server error: %w", err) | |
| case <-innerCtx.Done(): | |
| return performShutdown("shutdown signal received, shutting down server...") | |
| case <-ctx.Done(): | |
| return performShutdown("parent context cancelled, shutting down...") | |
| } |
🤖 Prompt for AI Agents
In examples/blog/main.go around lines 118 to 166, the shutdown logic for both
signal handling and parent context cancellation is duplicated. Refactor by
extracting the common shutdown steps into a separate function that accepts the
necessary contexts and parameters, then call this function from both cases to
eliminate redundancy and improve code maintainability.
1 participant
Summary
blogexample under examples/Testing
go test ./...https://chatgpt.com/codex/tasks/task_e_6843658a40b083339580585f676855ed
Summary by CodeRabbit
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