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shfmt: skip non-regular files - #1089

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I had a named pipe in my source directory, and shfmt . suddenly stopped working.

It probably doesn't make sense to try reading non-regular files.

I had a named pipe in my source directory, and "shfmt ." suddenly
stopped working.

It probably doesn't make sense to try reading non-regular files.

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
@mvdan

mvdan commented Apr 22, 2025

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Thanks for the PR! This is a pretty silly but significant omission on my part. I think the fix should be in fileutil, and with a test, so I'll do a slightly different fix while thanking you in the commit message. And apologies for the slowness.

@mvdan mvdan closed this in 513f2df Apr 22, 2025
apricote pushed a commit to hetznercloud/fleeting-plugin-hetzner that referenced this pull request Jan 9, 2026
…ercloud/fleeting-plugin-hetzner!333)

This MR contains the following updates:

| Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [mvdan.cc/sh/v3/cmd/shfmt](https://github.com/mvdan/sh) | `v3.8.0` → `v3.12.0` | ![age](https://developer.mend.io/api/mc/badges/age/go/mvdan.cc%2fsh%2fv3%2fcmd%2fshfmt/v3.12.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/go/mvdan.cc%2fsh%2fv3%2fcmd%2fshfmt/v3.8.0/v3.12.0?slim=true) |

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---

### Release Notes

<details>
<summary>mvdan/sh (mvdan.cc/sh/v3/cmd/shfmt)</summary>

### [`v3.12.0`](https://github.com/mvdan/sh/releases/tag/v3.12.0)

[Compare Source](mvdan/sh@v3.11.0...v3.12.0)

- The `mvdan-sh` JS package is discontinued in favor of `sh-syntax` - [#&#8203;1145](mvdan/sh#1145)
- **cmd/shfmt**
  - Support the "simplify" and "minify" flags via EditorConfig - [#&#8203;819](mvdan/sh#819)
  - `--simplify` and `--minify` are now formatting options, disabling the use of EditorConfig
  - Do not allow `--write` to replace non-regular files - [#&#8203;843](mvdan/sh#843)
- **interp**
  - Add `IsBuiltin` to check if a command name is a shell built-in - [#&#8203;1164](mvdan/sh#1164)
  - Add `HandlerContext.Builtin` to allow `ExecHandlerFunc` to call built-ins
  - Initial support for `$!` and `wait PID` - [#&#8203;221](mvdan/sh#221)
  - Return non-fatal `ExecHandlerFunc` errors via the `Runner.Run` API
  - Add `HandlerContext.Pos` to provide handlers with source positions
  - Deprecate `NewExitStatus` and `IsExitStatus` in favor of `ExitStatus`
  - Fix `wait` to always return the status of the last given job
  - Copy all env vars for background subshells to avoid data races
  - Support reading random numbers via `$RANDOM` and `$SRANDOM`
  - Set `$BASH_REMATCH` when matching regular expressions via `=~`
  - Support modifying local vars from the parent calling function
- **expand**
  - Adjust which backslash sequences are expanded in here-docs - [#&#8203;1138](mvdan/sh#1138)
  - Tweak tilde expansions to match Bash semantics
- **pattern**
  - Remove the flawed and broken `Braces` mode; use `syntax.SplitBraces` instead
  - Tweak `**` to only act as "globstar" when alone as a path element - [#&#8203;1149](mvdan/sh#1149)
  - Tweak `*` and `**` to not match leading dots in basenames
  - Add a `NoGlobStar` mode to match the POSIX semantics
- **fileutil**
  - Treat all non-regular files as definitely not shell scripts - [#&#8203;1089](mvdan/sh#1089)

Consider [becoming a sponsor](https://github.com/sponsors/mvdan) if you benefit from the work that went into this release!

Binaries built on `go version go1.24.4 linux/amd64` with:

```
CGO_ENABLED=0 go build -trimpath -ldflags="-w -s -X=main.version=v3.12.0"
```

### [`v3.11.0`](https://github.com/mvdan/sh/releases/tag/v3.11.0)

[Compare Source](mvdan/sh@v3.10.0...v3.11.0)

This release drops support for Go 1.22 and includes many enhancements.

- **cmd/shfmt**
  - Support `-l=0` and `-f=0` to split filenames with null bytes - [#&#8203;1096](mvdan/sh#1096)
- **syntax**
  - New iterator API: `Parser.WordsSeq`
  - Fix `Parser.Incomplete` and `IsIncomplete` to work well with `Parser.Words` - [#&#8203;937](mvdan/sh#937)
  - Initial support for parsing incomplete shell via `RecoverErrors`
  - Expand `LangError` to include which language was used when parsing
- **interp**
  - Refactor setting variables to fix array declaration edge cases - [#&#8203;1108](mvdan/sh#1108)
  - Fix `test` read/write/exec operators to work correctly on directories - [#&#8203;1116](mvdan/sh#1116)
  - Replace the `cancelreader` dependency with `os.File.SetReadDeadline`
  - Avoid waiting for process substitutions, matching Bash
  - Skip `OpenHandler` when opening named pipes for process substitutions - [#&#8203;1120](mvdan/sh#1120)
  - Use `TMPDIR` if set via `Env` to create temporary files such as named pipes
- **expand**
  - New iterator API: `FieldsSeq`
  - Correctly handle repeated backslashes in double quotes - [#&#8203;1106](mvdan/sh#1106)
  - Don't expand backslashes inside here-documents - [#&#8203;1070](mvdan/sh#1070)
  - Replace the `Unset` kind with a new `Variable.Set` boolean field

Consider [becoming a sponsor](https://github.com/sponsors/mvdan) if you benefit from the work that went into this release!

Binaries built on `go version go1.24.0 linux/amd64` with:

```
CGO_ENABLED=0 go build -trimpath -ldflags="-w -s -X=main.version=v3.11.0"
```

### [`v3.10.0`](https://github.com/mvdan/sh/releases/tag/v3.10.0)

[Compare Source](mvdan/sh@v3.9.0...v3.10.0)

- **cmd/shfmt**
  - Report the correct language variant in parser error messages - [#&#8203;1102](mvdan/sh#1102)
  - Move `--filename` out of the parser options category - [#&#8203;1079](mvdan/sh#1079)
- **syntax**
  - Parse all CRLF line endings as LF, including inside heredocs - [#&#8203;1088](mvdan/sh#1088)
  - Count skipped backslashes inside backticks in position column numbers - [#&#8203;1098](mvdan/sh#1098)
  - Count skipped null bytes in position column numbers for consistency
- **interp**
  - Fix a regression in `v3.9.0` which broke redirecting files to stdin - [#&#8203;1099](mvdan/sh#1099)
  - Fix a regression in `v3.9.0` where `HandlerContext.Stdin` was never nil
  - Add an `Interactive` option to be used by interactive shells - [#&#8203;1100](mvdan/sh#1100)
  - Support closing stdin, stdout, and stderr via redirections like `<&-`

Consider [becoming a sponsor](https://github.com/sponsors/mvdan) if you benefit from the work that went into this release!

Binaries built on `go version go1.23.2 linux/amd64` with:

```
CGO_ENABLED=0 go build -trimpath -ldflags="-w -s -X=main.version=v3.10.0"
```

### [`v3.9.0`](https://github.com/mvdan/sh/releases/tag/v3.9.0)

[Compare Source](mvdan/sh@v3.8.0...v3.9.0)

This release drops support for Go 1.21 and includes many fixes.

- **cmd/shfmt**
  - Switch the diff implementation to remove one dependency
- **syntax**
  - Protect against overflows in position offset integers
- **interp**
  - Use `os.Pipe` for stdin to prevent draining by subprocesses - [#&#8203;1085](mvdan/sh#1085)
  - Support cancelling reads in builtins when stdin is a file - [#&#8203;1066](mvdan/sh#1066)
  - Support the `nocaseglob` bash option - [#&#8203;1073](mvdan/sh#1073)
  - Support the Bash 5.2 `@k` parameter expansion operator
  - Support the `test -O` and `test -G` operators on non-Windows - [#&#8203;1080](mvdan/sh#1080)
  - Support the `read -s` builtin flag - [#&#8203;1063](mvdan/sh#1063)
- **expand**
  - Add support for case insensitive globbing - [#&#8203;1073](mvdan/sh#1073)
  - Don't panic when pattern words are nil - [#&#8203;1076](mvdan/sh#1076)

A special thanks to [@&#8203;theclapp](https://github.com/theclapp) for their contributors to this release!

Consider [becoming a sponsor](https://github.com/sponsors/mvdan) if you benefit from the work that went into this release!

Binaries built on `go version go1.23.0 linux/amd64` with:

```
CGO_ENABLED=0 go build -trimpath -ldflags="-w -s -X=main.version=v3.9.0"
```

</details>

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This MR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0Mi43Ni4wIiwidXBkYXRlZEluVmVyIjoiNDIuNzYuMCIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOltdfQ==-->
qiangli pushed a commit to qiangli/sh that referenced this pull request Sep 28, 2026
Sprint: mvdan#319
Story: mvdan#1089
Story-ID: 3185346bc4b5
qiangli pushed a commit to qiangli/sh that referenced this pull request Sep 28, 2026
…ases

R45's interpreted go/types TestTypeSetString case
`type E interface{comparable}` reported `(ast: *ast.Ident) is not a
type`: at go/types scale the reflect registry can materialise a distinct
object for the same imported type spelled under a per-file import alias,
so an `x.(*ast.Ident)` identity request answers false and the checker
stops treating the node as a type.

goSourceNativeAssertIdentical now falls back to package-path identity
when the reflect answer is false: two named types with the same package
path and name (pointer depth preserved) are the same type by definition,
so this only rescues a genuine identity, never invents one. The path
reduction lives in the new goSourceNativeTypePathIdentity helper.

TestS809GoTypesTypeSetStringBodies gains an outside-corpus focused
reduction that models the universe/comparable object-identity path in an
interpreted package (Universe.Insert/Lookup, *TypeName/*Named asserts
across files); it documents the scenario shape and passes. The small
worker resolves identity correctly, so the registry miss reproduces only
at go/types scale (R45), not in the reduction; TestS319NativeTypePathIdentity
unit-tests the helper directly.

Sprint: mvdan#319
Story: mvdan#1089
Story-ID: 3185346bc4b5
qiangli added a commit to qiangli/sh that referenced this pull request Sep 28, 2026
qiangli added a commit to qiangli/sh that referenced this pull request Sep 28, 2026
qiangli pushed a commit to qiangli/sh that referenced this pull request Sep 28, 2026
qiangli pushed a commit to qiangli/sh that referenced this pull request Sep 28, 2026
qiangli pushed a commit to qiangli/sh that referenced this pull request Sep 28, 2026
qiangli pushed a commit to qiangli/sh that referenced this pull request Sep 28, 2026
qiangli pushed a commit to qiangli/sh that referenced this pull request Sep 28, 2026
Sprint: mvdan#319
Story: mvdan#1089
Story-ID: 3185346bc4b5
qiangli pushed a commit to qiangli/sh that referenced this pull request Sep 28, 2026
qiangli pushed a commit to qiangli/sh that referenced this pull request Sep 28, 2026
qiangli added a commit to qiangli/sh that referenced this pull request Sep 28, 2026
The submitted source changes were cherry-picked as abf9cd6; the KB journal was reconciled in that commit.

Sprint: mvdan#319
Story: mvdan#1089
Story-ID: 3185346bc4b5
qiangli added a commit to qiangli/sh that referenced this pull request Sep 28, 2026
The submitted source changes were integrated in the published mapped-signature, typed-zero, and scalar-method commit series (2208f8d, 94bae3e, ceb9115); manager follow-up commits adjusted the signature boundary.

Sprint: mvdan#319
Story: mvdan#1089
Story-ID: 3185346bc4b5
qiangli added a commit to qiangli/sh that referenced this pull request Oct 1, 2026
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