move nix files to folder (#520)

* move nix files to folder

* move nix to scripts

scripts/nix/direct-sqlite-2.3.26.patch

@@ -0,0 +1,15 @@
+diff --git a/direct-sqlite.cabal b/direct-sqlite.cabal
+index 96f26b7..996198e 100644
+--- a/direct-sqlite.cabal
++++ b/direct-sqlite.cabal
+@@ -69,7 +69,9 @@ library
+     install-includes: sqlite3.h, sqlite3ext.h
+     include-dirs:     cbits
+
+-    if !os(windows) && !os(android)
++    extra-libraries: dl
++
++    if !os(windows) && !os(android)
+       extra-libraries: pthread
+
+     if flag(fulltextsearch)

scripts/nix/entropy.patch

@@ -0,0 +1,30 @@
+diff --git a/cbits/random_initialized.c b/cbits/random_initialized.c
+index 36ac968..ab708b0 100644
+--- a/cbits/random_initialized.c
++++ b/cbits/random_initialized.c
+@@ -5,14 +5,6 @@
+ #include <sys/stat.h>
+ #include <unistd.h>
+
+-#ifdef HAVE_GETENTROPY
+-static int ensure_pool_initialized_getentropy()
+-{
+-    char tmp;
+-    return getentropy(&tmp, sizeof(tmp));
+-}
+-#endif
+-
+ // Poll /dev/random to wait for randomness. This is a proxy for the /dev/urandom
+ // pool being initialized.
+ static int ensure_pool_initialized_poll()
+@@ -45,10 +37,5 @@ static int ensure_pool_initialized_poll()
+ // Returns 0 on success, non-zero on failure.
+ int ensure_pool_initialized()
+ {
+-#ifdef HAVE_GETENTROPY
+-    if (ensure_pool_initialized_getentropy() == 0)
+-        return 0;
+-#endif
+-
+     return ensure_pool_initialized_poll();
+ }

scripts/nix/sha256map.nix

@@ -0,0 +1,6 @@
+{
+  "https://github.com/simplex-chat/simplexmq.git"."a638486bb3a9b212d15775d0bc63de2e619e0518" = "14m6ljmkfvcqnv53lp4ygaqnn2vydhws1hc3ah8zh5l5g4hkif36";
+  "https://github.com/simplex-chat/aeson.git"."3eb66f9a68f103b5f1489382aad89f5712a64db7" = "0kilkx59fl6c3qy3kjczqvm8c3f4n3p0bdk9biyflf51ljnzp4yp";
+  "https://github.com/simplex-chat/haskell-terminal.git"."f708b00009b54890172068f168bf98508ffcd495" = "0zmq7lmfsk8m340g47g5963yba7i88n4afa6z93sg9px5jv1mijj";
+  "https://github.com/zw3rk/android-support.git"."3c3a5ab0b8b137a072c98d3d0937cbdc96918ddb" = "1r6jyxbim3dsvrmakqfyxbd6ms6miaghpbwyl0sr6dzwpgaprz97";
+}

scripts/nix/update-sha256.awk

@@ -0,0 +1,23 @@
+BEGIN {
+  print "{"
+  loc=""
+  ref=""
+  isGit=false
+}
+/source-repository-package/ { loc=""; ref=""; isGit=false; }
+
+/type: git/ { isGit=true; }
+/location/ && isGit == true { loc=$2 }
+/tag/ && isGit == true { ref=$2 }
+
+isGit == true && loc != "" && ref != "" {
+  cmd = "nix-prefetch-git --quiet "loc" "ref" | jq -r .sha256"
+  cmd | getline sha256
+  close(cmd)
+  print "  \""loc"\".\""ref"\" = \""sha256"\";";
+  isGit=false; loc=""; ref="";
+}
+
+END {
+  print "}"
+}