2 Commits

Author SHA1 Message Date
Renovate Bot
8088df52b9 fix(deps): update module golang.org/x/term to v0.43.0 (#948)
This PR contains the following updates:

| Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [golang.org/x/term](https://pkg.go.dev/golang.org/x/term) | [`v0.42.0` → `v0.43.0`](https://cs.opensource.google/go/x/term/+/refs/tags/v0.42.0...refs/tags/v0.43.0) | ![age](https://developer.mend.io/api/mc/badges/age/go/golang.org%2fx%2fterm/v0.43.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/go/golang.org%2fx%2fterm/v0.42.0/v0.43.0?slim=true) |

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Reviewed-on: https://gitea.com/gitea/runner/pulls/948
Reviewed-by: silverwind <2021+silverwind@noreply.gitea.com>
Co-authored-by: Renovate Bot <renovate-bot@gitea.com>
Co-committed-by: Renovate Bot <renovate-bot@gitea.com>
2026-05-09 05:28:44 +00:00
Nicolas
3ea7d39690 fix: overwrite read-only files when copying action directories (#942)
## Summary

  - `CopyCollector.WriteFile` now removes any existing destination file
    before writing, handling read-only modes (e.g. git pack files at
    `0444`) that cause `EACCES`/`ERROR_ACCESS_DENIED` on macOS and Windows.
  - Added `O_TRUNC` to the `OpenFile` flags as a safety net.

  ## Root cause

  When a composite action with a post step runs on a host runner,
  `runPostStep` calls `maybeCopyToActionDir`, which re-copies the action
  into `miscpath/act/actions/<name>/`. The first copy (main step) writes
  `.git/objects/pack/*.idx` at the destination with mode `0444` (as set
  by go-git). The second copy (post step) calls
  `os.OpenFile(dest, O_CREATE|O_WRONLY, …)` on that existing `0444` file,
  which fails immediately:

  - macOS: `open <path>: permission denied`
  - Windows: `open <path>: Access is denied`

Fixes: https://gitea.com/gitea/runner/issues/941
Fixes: https://gitea.com/gitea/runner/issues/876

---------

Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: silverwind <2021+silverwind@noreply.gitea.com>
Reviewed-on: https://gitea.com/gitea/runner/pulls/942
Reviewed-by: silverwind <2021+silverwind@noreply.gitea.com>
Co-authored-by: Nicolas <bircni@icloud.com>
Co-committed-by: Nicolas <bircni@icloud.com>
2026-05-08 04:11:42 +00:00
4 changed files with 60 additions and 3 deletions

View File

@@ -73,10 +73,16 @@ func (cc *CopyCollector) WriteFile(fpath string, fi fs.FileInfo, linkName string
if err := os.MkdirAll(filepath.Dir(fdestpath), 0o777); err != nil {
return err
}
// Remove any existing destination so we can overwrite read-only files
// (e.g. git pack files at mode 0444 trip EACCES on macOS and "Access is
// denied" on Windows when reopened with O_WRONLY) and so os.Symlink does
// not fail with EEXIST. os.Remove clears the Windows read-only attribute
// internally; on Unix unlink only needs write permission on the parent.
_ = os.Remove(fdestpath)
if f == nil {
return os.Symlink(linkName, fdestpath)
}
df, err := os.OpenFile(fdestpath, os.O_CREATE|os.O_WRONLY, fi.Mode())
df, err := os.OpenFile(fdestpath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, fi.Mode())
if err != nil {
return err
}

View File

@@ -8,7 +8,9 @@ import (
"archive/tar"
"context"
"io"
"os"
"path/filepath"
"runtime"
"strings"
"testing"
@@ -20,6 +22,7 @@ import (
"github.com/go-git/go-git/v5/plumbing/format/index"
"github.com/go-git/go-git/v5/storage/filesystem"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
type memoryFs struct {
@@ -174,3 +177,47 @@ func TestSymlinks(t *testing.T) {
assert.Equal(t, ".env", files["test.env"].Linkname)
assert.ErrorIs(t, err, io.EOF, "tar must be read cleanly to EOF")
}
// Regression for https://gitea.com/gitea/runner/issues/876 and /941:
// re-copying an action directory must overwrite a pre-existing read-only
// file (e.g. a git pack .idx at mode 0444) instead of failing with EACCES
// on macOS or "Access is denied" on Windows.
func TestCopyCollectorWriteFileOverwritesReadOnlyFile(t *testing.T) {
dst := t.TempDir()
target := filepath.Join(dst, "sub", "pack.idx")
require.NoError(t, os.MkdirAll(filepath.Dir(target), 0o755))
require.NoError(t, os.WriteFile(target, []byte("old"), 0o444))
src := filepath.Join(t.TempDir(), "pack.idx")
require.NoError(t, os.WriteFile(src, []byte("new"), 0o444))
fi, err := os.Stat(src)
require.NoError(t, err)
cc := &CopyCollector{DstDir: dst}
require.NoError(t, cc.WriteFile("sub/pack.idx", fi, "", strings.NewReader("new")))
got, err := os.ReadFile(target)
require.NoError(t, err)
assert.Equal(t, "new", string(got))
}
// Without the destination removal, os.Symlink fails with EEXIST when the
// path already holds a regular file from an earlier copy of the action.
func TestCopyCollectorWriteFileOverwritesFileWithSymlink(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip("creating symlinks requires elevated privileges on Windows")
}
dst := t.TempDir()
target := filepath.Join(dst, "link")
require.NoError(t, os.WriteFile(target, []byte("stale"), 0o644))
fi, err := os.Lstat(target)
require.NoError(t, err)
cc := &CopyCollector{DstDir: dst}
require.NoError(t, cc.WriteFile("link", fi, "target", nil))
resolved, err := os.Readlink(target)
require.NoError(t, err)
assert.Equal(t, "target", resolved)
}

4
go.mod
View File

@@ -13,7 +13,7 @@ require (
github.com/spf13/cobra v1.10.2
github.com/stretchr/testify v1.11.1
go.yaml.in/yaml/v4 v4.0.0-rc.3
golang.org/x/term v0.42.0
golang.org/x/term v0.43.0
golang.org/x/time v0.14.0 // indirect
google.golang.org/protobuf v1.36.11
gopkg.in/yaml.v3 v3.0.1 // indirect
@@ -108,7 +108,7 @@ require (
golang.org/x/crypto v0.50.0 // indirect
golang.org/x/net v0.53.0 // indirect
golang.org/x/sync v0.20.0 // indirect
golang.org/x/sys v0.43.0 // indirect
golang.org/x/sys v0.44.0 // indirect
google.golang.org/genproto/googleapis/rpc v0.0.0-20240903143218-8af14fe29dc1 // indirect
google.golang.org/grpc v1.67.0 // indirect
gopkg.in/warnings.v0 v0.1.2 // indirect

4
go.sum
View File

@@ -323,6 +323,8 @@ golang.org/x/sys v0.42.0 h1:omrd2nAlyT5ESRdCLYdm3+fMfNFE/+Rf4bDIQImRJeo=
golang.org/x/sys v0.42.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
golang.org/x/sys v0.43.0 h1:Rlag2XtaFTxp19wS8MXlJwTvoh8ArU6ezoyFsMyCTNI=
golang.org/x/sys v0.43.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
golang.org/x/sys v0.44.0 h1:ildZl3J4uzeKP07r2F++Op7E9B29JRUy+a27EibtBTQ=
golang.org/x/sys v0.44.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/term v0.40.0 h1:36e4zGLqU4yhjlmxEaagx2KuYbJq3EwY8K943ZsHcvg=
golang.org/x/term v0.40.0/go.mod h1:w2P8uVp06p2iyKKuvXIm7N/y0UCRt3UfJTfZ7oOpglM=
@@ -330,6 +332,8 @@ golang.org/x/term v0.41.0 h1:QCgPso/Q3RTJx2Th4bDLqML4W6iJiaXFq2/ftQF13YU=
golang.org/x/term v0.41.0/go.mod h1:3pfBgksrReYfZ5lvYM0kSO0LIkAl4Yl2bXOkKP7Ec2A=
golang.org/x/term v0.42.0 h1:UiKe+zDFmJobeJ5ggPwOshJIVt6/Ft0rcfrXZDLWAWY=
golang.org/x/term v0.42.0/go.mod h1:Dq/D+snpsbazcBG5+F9Q1n2rXV8Ma+71xEjTRufARgY=
golang.org/x/term v0.43.0 h1:S4RLU2sB31O/NCl+zFN9Aru9A/Cq2aqKpTZJ6B+DwT4=
golang.org/x/term v0.43.0/go.mod h1:lrhlHNdQJHO+1qVYiHfFKVuVioJIheAc3fBSMFYEIsk=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=