From 73e89dd7760b6f37be3b8a6d110d12633bbbf651 Mon Sep 17 00:00:00 2001
From: Lars Wirzenius <liw@liw.fi>
Date: Thu, 18 Feb 2021 10:25:16 +0200
Subject: feat: support named pipes (FIFOs)

---
 subplot/summain.py   |  4 ++++
 subplot/summain.yaml |  3 +++
 summain.md           | 23 +++++++++++++++++++++++
 3 files changed, 30 insertions(+)

diff --git a/subplot/summain.py b/subplot/summain.py
index e137ade..ca7c0f6 100644
--- a/subplot/summain.py
+++ b/subplot/summain.py
@@ -28,6 +28,10 @@ def create_socket(ctx, filename=None):
     fd.bind(filename)
 
 
+def create_fifo(ctx, filename=None):
+    os.mkfifo(filename)
+
+
 def set_mode(ctx, filename=None, mode=None):
     os.chmod(filename, int(mode, 8))
 
diff --git a/subplot/summain.yaml b/subplot/summain.yaml
index 8df3642..8e5333c 100644
--- a/subplot/summain.yaml
+++ b/subplot/summain.yaml
@@ -7,6 +7,9 @@
 - given: socket {filename}
   function: create_socket
 
+- given: named pipe {filename}
+  function: create_fifo
+
 - given: file {filename}
   function: create_file
 
diff --git a/summain.md b/summain.md
index 1631622..df2087e 100644
--- a/summain.md
+++ b/summain.md
@@ -226,6 +226,29 @@ sha256: ~
 target: ~
 ```
 
+## Named pipe
+
+~~~scenario
+given an installed summain
+given named pipe aaa
+and file aaa has mode 0700
+and mtime for aaa is 44
+when I run summain aaa
+then output matches file fifo.yaml
+~~~
+
+```{#fifo.yaml .file .numberLines}
+---
+path: aaa
+mode: prwx------
+mtime: 44
+mtime_nsec: 0
+nlink: 1
+size: 0
+sha256: ~
+target: ~
+```
+
 ---
 title: "Summain&mdash;deterministic file manifests"
 author: Lars Wirzenius
-- 
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