Improve version and revision info handling

Modify the REVISION variable to include both commit date and hash.
Update config package to parse and store revision components separately.
Modify about page and routes to display more detailed revision information.

Makefile

@@ -4,7 +4,9 @@
 BINARY_NAME=pixivfe
 TARGETOS ?= $(shell go env GOOS)
 TARGETARCH ?= $(shell go env GOARCH)
-GIT_COMMIT := $(shell git describe --always 2>/dev/null)
+GIT_COMMIT_DATE := $(shell git show -s --format=%cd --date=format:"%Y.%m.%d")
+GIT_COMMIT_HASH := $(shell git rev-parse --short HEAD)
+REVISION := $(GIT_COMMIT_DATE)-$(GIT_COMMIT_HASH)
 
 # Include environment variables from .env if it exists
 -include .env
@@ -20,7 +22,7 @@ fmt:
 build:
 	@echo "Building $(BINARY_NAME)..."
 	go mod download
-	CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -v -ldflags="-extldflags=-static -X codeberg.org/vnpower/pixivfe/v2/config.REVISION=$(GIT_COMMIT)" -tags netgo -o $(BINARY_NAME)
+	CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -v -ldflags="-extldflags=-static -X codeberg.org/vnpower/pixivfe/v2/config.REVISION=$(REVISION)" -tags netgo -o $(BINARY_NAME)
 
 test:
 	@echo "Running tests..."

assets/views/about.jet.html

@@ -13,7 +13,7 @@
     {{- if .Revision != "" }}
     <li>
       <b>Revision:</b>
-      <a href="https://codeberg.org/VnPower/PixivFE/commit/{{ .Revision }}">{{ .Revision }}</a><br />
+      <a href="https://codeberg.org/VnPower/PixivFE/commit/{{ .RevisionHash }}">{{ .Revision }}</a><br />
       PixivFE's source code revision
     </li>
     {{- end }}

config/config.go

@@ -15,11 +15,20 @@ import (
 )
 
 var GlobalConfig ServerConfig
+
+// REVISION stores the current version's revision information
 var REVISION string = ""
 
+const (
+	unknownRevision = "unknown"
+	revisionFormat  = "date-hash"
+)
+
 type ServerConfig struct {
 	Version      string
 	Revision     string
+	RevisionDate string
+	RevisionHash string
 	StartingTime string // used in /about page
 
 	Host string `env:"PIXIVFE_HOST"`
@@ -54,10 +63,31 @@ type ServerConfig struct {
 	ResponseSaveLocation string `env:"PIXIVFE_RESPONSE_SAVE_LOCATION,overwrite"`
 }
 
+// parseRevision extracts date and hash from the revision string
+func parseRevision(revision string) (date, hash string) {
+	if revision == "" {
+		return unknownRevision, unknownRevision
+	}
+	parts := strings.Split(revision, "-")
+	if len(parts) == 2 {
+		return parts[0], parts[1]
+	}
+	return unknownRevision, revision
+}
+
 func (s *ServerConfig) LoadConfig() error {
 	s.Version = "v2.9"
 	s.Revision = REVISION
-	log.Printf("PixivFE %s %s\n", s.Version, s.Revision)
+
+	s.RevisionDate, s.RevisionHash = parseRevision(REVISION)
+
+	if REVISION == "" {
+		log.Printf("[WARNING] REVISION is not set. Continuing with unknown revision information.\n")
+	} else if s.RevisionDate == unknownRevision {
+		log.Printf("[WARNING] REVISION format is invalid: %s. Expected format '%s'. Continuing with full revision as hash.\n", REVISION, revisionFormat)
+	}
+
+	log.Printf("PixivFE %s, revision %s\n", s.Version, s.Revision)
 
 	s.StartingTime = time.Now().UTC().Format("2006-01-02 15:04")
 

server/routes/about.go

@@ -10,6 +10,7 @@ func AboutPage(w http.ResponseWriter, r *http.Request) error {
 		Time:           config.GlobalConfig.StartingTime,
 		Version:        config.GlobalConfig.Version,
 		Revision:       config.GlobalConfig.Revision,
+		RevisionHash:   config.GlobalConfig.RevisionHash,
 		ImageProxy:     config.GlobalConfig.ProxyServer.String(),
 		AcceptLanguage: config.GlobalConfig.AcceptLanguage,
 	})

server/routes/types.go

@@ -22,6 +22,7 @@ type Data_about struct {
 	Time           string
 	Version        string
 	Revision       string
+	RevisionHash   string
 	ImageProxy     string
 	AcceptLanguage string
 }