From 1bb0682817ddc620ce8ae2b452cd7b06a484ca15 Mon Sep 17 00:00:00 2001
From: Brandon Croft <brandon.croft@gmail.com>
Date: Thu, 9 Nov 2023 16:32:56 -0700
Subject: [PATCH] Fixes bug where go-slug would not build on 32 bit linux

---
 .github/workflows/test.yml                    | 23 +++++++++++++++
 internal/unpackinfo/lchtimes_linux32.go       | 28 +++++++++++++++++++
 ...{lchtimes_linux.go => lchtimes_linux64.go} |  4 +--
 internal/unpackinfo/lchtimes_others.go        |  4 +--
 4 files changed, 55 insertions(+), 4 deletions(-)
 create mode 100644 internal/unpackinfo/lchtimes_linux32.go
 rename internal/unpackinfo/{lchtimes_linux.go => lchtimes_linux64.go} (93%)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index efdb776..278a0af 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -3,6 +3,29 @@ name: test
 on: [push]
 
 jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        goos: [linux, windows, darwin]
+        goarch: ["386", amd64, arm64]
+        exclude:
+          - goarch: "386"
+            goos: darwin
+          - goarch: arm64
+            goos: windows
+    steps:
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
+
+      - name: setup go
+        uses: actions/setup-go@93397bea11091df50f3d7e59dc26a7711a8bcfbe # v4.1.0
+        with:
+          go-version-file: go.mod
+
+      - name: build
+        run: GOOS=${{ matrix.goos }} GOARCH=${{ matrix.goarch }} go build
+
   unit-test:
     runs-on: ubuntu-latest
     steps:
diff --git a/internal/unpackinfo/lchtimes_linux32.go b/internal/unpackinfo/lchtimes_linux32.go
new file mode 100644
index 0000000..f456791
--- /dev/null
+++ b/internal/unpackinfo/lchtimes_linux32.go
@@ -0,0 +1,28 @@
+//go:build linux_amd || linux_arm
+// +build linux_amd linux_arm
+
+package unpackinfo
+
+import (
+	"golang.org/x/sys/unix"
+)
+
+// Lchtimes modifies the access and modified timestamps on a target path
+// This capability is only available on Linux and Darwin as of now.
+func (i UnpackInfo) Lchtimes() error {
+	return unix.Lutimes(i.Path, []unix.Timeval{
+		{Sec: i.OriginalAccessTime.Unix(), Usec: int32(i.OriginalAccessTime.Nanosecond() / 1e6 % 1e6)},
+		{Sec: i.OriginalModTime.Unix(), Usec: int32(i.OriginalModTime.Nanosecond() / 1e6 % 1e6)}},
+	)
+}
+
+// CanMaintainSymlinkTimestamps determines whether is is possible to change
+// timestamps on symlinks for the the current platform. For regular files
+// and directories, attempts are made to restore permissions and timestamps
+// after extraction. But for symbolic links, go's cross-platform
+// packages (Chmod and Chtimes) are not capable of changing symlink info
+// because those methods follow the symlinks. However, a platform-dependent option
+// is provided for linux and darwin (see Lchtimes)
+func CanMaintainSymlinkTimestamps() bool {
+	return true
+}
diff --git a/internal/unpackinfo/lchtimes_linux.go b/internal/unpackinfo/lchtimes_linux64.go
similarity index 93%
rename from internal/unpackinfo/lchtimes_linux.go
rename to internal/unpackinfo/lchtimes_linux64.go
index c9ed6b3..e3dadc3 100644
--- a/internal/unpackinfo/lchtimes_linux.go
+++ b/internal/unpackinfo/lchtimes_linux64.go
@@ -1,5 +1,5 @@
-//go:build linux
-// +build linux
+//go:build linux_amd64 || linux_arm64
+// +build linux_amd64 linux_arm64
 
 package unpackinfo
 
diff --git a/internal/unpackinfo/lchtimes_others.go b/internal/unpackinfo/lchtimes_others.go
index 1219ba4..7a6c649 100644
--- a/internal/unpackinfo/lchtimes_others.go
+++ b/internal/unpackinfo/lchtimes_others.go
@@ -1,5 +1,5 @@
-//go:build !(linux || darwin)
-// +build !linux,!darwin
+//go:build !darwin && !linux_amd64 && !linux_arm64 && !linux_amd && !linux_arm
+// +build !darwin,!linux_amd64,!linux_arm64,!linux_amd,!linux_arm
 
 package unpackinfo