86 lines
2.3 KiB
Go
86 lines
2.3 KiB
Go
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package delta
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import (
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"net/http"
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"os"
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"path/filepath"
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"github.com/gin-gonic/gin"
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)
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// Handler provides delta patch generation for JAR artefacts.
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type Handler struct {
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artefactDir string
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}
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func NewHandler(artefactDir string) *Handler {
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return &Handler{artefactDir: artefactDir}
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}
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// GenerateDelta creates a delta patch between two artefact versions.
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// POST /api/v1/delta/generate
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// Form fields: oldVersion, newVersion
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func (h *Handler) GenerateDelta(c *gin.Context) {
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oldVersion := c.PostForm("oldVersion")
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newVersion := c.PostForm("newVersion")
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if oldVersion == "" || newVersion == "" {
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c.JSON(http.StatusBadRequest, gin.H{"error": "oldVersion and newVersion are required"})
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return
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}
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oldDir := filepath.Join(h.artefactDir, oldVersion)
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newDir := filepath.Join(h.artefactDir, newVersion)
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if _, err := os.Stat(oldDir); os.IsNotExist(err) {
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c.JSON(http.StatusNotFound, gin.H{"error": "Old version not found: " + oldVersion})
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return
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}
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if _, err := os.Stat(newDir); os.IsNotExist(err) {
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c.JSON(http.StatusNotFound, gin.H{"error": "New version not found: " + newVersion})
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return
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}
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// Find JAR files in each version directory
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oldJar, err := findJarInDir(oldDir)
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if err != nil {
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c.JSON(http.StatusBadRequest, gin.H{"error": "No JAR found in old version: " + err.Error()})
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return
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}
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newJar, err := findJarInDir(newDir)
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if err != nil {
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c.JSON(http.StatusBadRequest, gin.H{"error": "No JAR found in new version: " + err.Error()})
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return
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}
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patchPath := filepath.Join(h.artefactDir, "patches", oldVersion+"-to-"+newVersion+".patch")
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if err := os.MkdirAll(filepath.Dir(patchPath), 0755); err != nil {
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c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to create patch directory"})
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return
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}
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if err := GenerateJarDelta(oldJar, newJar, patchPath); err != nil {
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c.JSON(http.StatusInternalServerError, gin.H{"error": "Delta generation failed: " + err.Error()})
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return
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}
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c.JSON(http.StatusOK, gin.H{
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"status": "generated",
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"patchPath": patchPath,
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"oldVersion": oldVersion,
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"newVersion": newVersion,
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})
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}
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func findJarInDir(dir string) (string, error) {
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entries, err := os.ReadDir(dir)
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if err != nil {
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return "", err
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}
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for _, e := range entries {
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if !e.IsDir() && filepath.Ext(e.Name()) == ".jar" {
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return filepath.Join(dir, e.Name()), nil
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}
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}
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return "", os.ErrNotExist
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}
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