From 5ae3fb2c3804a74251c359d603e00bd947aaea15 Mon Sep 17 00:00:00 2001
From: Silvan Mosberger <contact@infinisil.com>
Date: Sat, 7 Mar 2020 02:44:56 +0100
Subject: lib/strings: Add floatToString

---
 lib/strings.nix | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'lib')

diff --git a/lib/strings.nix b/lib/strings.nix
index 74e3eaa0722de..0baa942355c0e 100644
--- a/lib/strings.nix
+++ b/lib/strings.nix
@@ -612,6 +612,22 @@ rec {
   */
   fixedWidthNumber = width: n: fixedWidthString width "0" (toString n);
 
+  /* Convert a float to a string, but emit a warning when precision is lost
+     during the conversion
+
+     Example:
+       floatToString 0.000001
+       => "0.000001"
+       floatToString 0.0000001
+       => trace: warning: Imprecise conversion from float to string 0.000000
+          "0.000000"
+  */
+  floatToString = float: let
+    result = toString float;
+    precise = float == builtins.fromJSON result;
+  in if precise then result
+    else lib.warn "Imprecise conversion from float to string ${result}" result;
+
   /* Check whether a value can be coerced to a string */
   isCoercibleToString = x:
     builtins.elem (builtins.typeOf x) [ "path" "string" "null" "int" "float" "bool" ] ||
-- 
cgit 1.4.1


From 9df69cba054c3b5d3a3b67778e0d2947eba3f297 Mon Sep 17 00:00:00 2001
From: Silvan Mosberger <contact@infinisil.com>
Date: Fri, 13 Dec 2019 00:24:30 +0100
Subject: lib/generators: Extend mkValueStringDefault with float support

---
 lib/generators.nix | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'lib')

diff --git a/lib/generators.nix b/lib/generators.nix
index efe6ea6031d33..abd237eb7d377 100644
--- a/lib/generators.nix
+++ b/lib/generators.nix
@@ -48,8 +48,10 @@ rec {
     else if isAttrs    v then err "attrsets" v
     # functions can’t be printed of course
     else if isFunction v then err "functions" v
-    # let’s not talk about floats. There is no sensible `toString` for them.
-    else if isFloat    v then err "floats" v
+    # Floats currently can't be converted to precise strings,
+    # condition warning on nix version once this isn't a problem anymore
+    # See https://github.com/NixOS/nix/pull/3480
+    else if isFloat    v then libStr.floatToString v
     else err "this value is" (toString v);
 
 
-- 
cgit 1.4.1


From f26cbd0caa96d491532a11da5477c67e5f7fceef Mon Sep 17 00:00:00 2001
From: Robert Scott <code@humanleg.org.uk>
Date: Mon, 3 Aug 2020 21:20:05 +0100
Subject: licenses: add bsdProtection

see https://spdx.org/licenses/BSD-Protection.html
---
 lib/licenses.nix | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'lib')

diff --git a/lib/licenses.nix b/lib/licenses.nix
index 2c6da3a865f8b..2f9fc04cb7cb6 100644
--- a/lib/licenses.nix
+++ b/lib/licenses.nix
@@ -110,6 +110,11 @@ lib.mapAttrs (n: v: v // { shortName = n; }) {
     fullName = ''BSD 4-clause "Original" or "Old" License'';
   };
 
+  bsdProtection = spdx {
+    spdxId = "BSD-Protection";
+    fullName = "BSD Protection License";
+  };
+
   bsl11 = {
     fullName = "Business Source License 1.1";
     url = "https://mariadb.com/bsl11";
-- 
cgit 1.4.1