From 53cafb5925510dcc40fec2e0b16ac6fa4d012f68 Mon Sep 17 00:00:00 2001
From: Dietmar Maurer <dietmar@proxmox.com>
Date: Tue, 5 Mar 2019 12:50:52 +0100
Subject: [PATCH] src/tools.rs: impl file_get_json()

---
 src/tools.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/tools.rs b/src/tools.rs
index 1b89b45c..44dd99ff 100644
--- a/src/tools.rs
+++ b/src/tools.rs
@@ -118,6 +118,19 @@ pub fn file_get_contents<P: AsRef<Path>>(path: P) -> Result<Vec<u8>, Error> {
     }).map_err(|err| format_err!("unable to read {:?} - {}", path, err))
 }
 
+pub fn file_get_json<P: AsRef<Path>>(path: P) -> Result<Value, Error> {
+
+    let path = path.as_ref();
+
+    let raw = file_get_contents(path)?;
+
+    try_block!({
+        let data = String::from_utf8(raw)?;
+        let json = serde_json::from_str(&data)?;
+        Ok(json)
+    }).map_err(|err: Error| format_err!("unable to read json from {:?} - {}", path, err))
+}
+
 /// Atomically write a file. We first create a temporary file, which
 /// is then renamed.
 pub fn file_set_contents<P: AsRef<Path>>(