From 1df3884b55dc3b8d045e9322225c102b551a2a51 Mon Sep 17 00:00:00 2001
From: Runxi Yu <me@runxiyu.org>
Date: Tue, 11 Feb 2025 23:35:53 +0800
Subject: repo_commit: Don't crash on null from/to files

---
 go.mod                |  2 +-
 go.sum                |  2 ++
 handle_repo_commit.go | 28 ++++++++++++++++++++++++++++
 3 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/go.mod b/go.mod
index 558d57e..e428ed4 100644
--- a/go.mod
+++ b/go.mod
@@ -7,7 +7,7 @@ require (
 	github.com/go-git/go-git/v5 v5.13.2
 	github.com/microcosm-cc/bluemonday v1.0.27
 	github.com/yuin/goldmark v1.7.8
-	go.lindenii.runxiyu.org/lindenii-common v0.0.0-20250211092902-f64ead6a659e
+	go.lindenii.runxiyu.org/lindenii-common v0.0.0-20250211153243-8946fae17bd0
 )
 
 require (
diff --git a/go.sum b/go.sum
index 33449a9..21235e3 100644
--- a/go.sum
+++ b/go.sum
@@ -87,6 +87,8 @@ github.com/yuin/goldmark v1.7.8 h1:iERMLn0/QJeHFhxSt3p6PeN9mGnvIKSpG9YYorDMnic=
 github.com/yuin/goldmark v1.7.8/go.mod h1:uzxRWxtg69N339t3louHJ7+O03ezfj6PlliRlaOzY1E=
 go.lindenii.runxiyu.org/lindenii-common v0.0.0-20250211092902-f64ead6a659e h1:Gb58k5z3NjOWdYMBvZaTLG4IWY6HcCVkwPz/J0lFKT0=
 go.lindenii.runxiyu.org/lindenii-common v0.0.0-20250211092902-f64ead6a659e/go.mod h1:bOxuuGXA3UpbLb1lKohr2j2MVcGGLcqfAprGx9VCkMA=
+go.lindenii.runxiyu.org/lindenii-common v0.0.0-20250211153243-8946fae17bd0 h1:NxXd9AOAMNKm2+WThVWqd41IqAKC3bKBvZMIUqAdT40=
+go.lindenii.runxiyu.org/lindenii-common v0.0.0-20250211153243-8946fae17bd0/go.mod h1:bOxuuGXA3UpbLb1lKohr2j2MVcGGLcqfAprGx9VCkMA=
 golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/crypto v0.33.0 h1:IOBPskki6Lysi0lo9qQvbxiQ+FvsCC/YWOecCHAixus=
 golang.org/x/crypto v0.33.0/go.mod h1:bVdXmD7IV/4GdElGPozy6U7lWdRXA4qyRVGJV57uQ5M=
diff --git a/handle_repo_commit.go b/handle_repo_commit.go
index 56103e7..d45fd1d 100644
--- a/handle_repo_commit.go
+++ b/handle_repo_commit.go
@@ -5,7 +5,9 @@ import (
 	"strings"
 
 	"github.com/go-git/go-git/v5/plumbing"
+	"github.com/go-git/go-git/v5/plumbing/filemode"
 	"github.com/go-git/go-git/v5/plumbing/format/diff"
+	"go.lindenii.runxiyu.org/lindenii-common/misc"
 )
 
 type usable_file_patch struct {
@@ -67,6 +69,12 @@ func handle_repo_commit(w http.ResponseWriter, r *http.Request) {
 	usable_file_patches := make([]usable_file_patch, 0)
 	for _, file_patch := range patch.FilePatches() {
 		from, to := file_patch.Files()
+		if from == nil {
+			from = fake_diff_file_null
+		}
+		if to == nil {
+			to = fake_diff_file_null
+		}
 		usable_file_patch := usable_file_patch{
 			Chunks: file_patch.Chunks(),
 			From:   from,
@@ -82,3 +90,23 @@ func handle_repo_commit(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 }
+
+type fake_diff_file struct {
+	hash plumbing.Hash
+	mode filemode.FileMode
+	path string
+}
+func (f fake_diff_file) Hash() plumbing.Hash {
+	return f.hash
+}
+func (f fake_diff_file) Mode() filemode.FileMode {
+	return f.mode
+}
+func (f fake_diff_file) Path() string {
+	return f.path
+}
+var fake_diff_file_null = fake_diff_file{
+	hash: plumbing.NewHash("e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"),
+	mode: misc.First_or_panic(filemode.New("100644")),
+	path: "NULL",
+}
-- 
cgit v1.2.3