sane-scripts: add sane-bt-rm to remove torrents

also rework statix-nix-shell to support bash

pkgs/additional/sane-scripts/default.nix

@@ -108,11 +108,17 @@ let
   };
 
   py-scripts = {
+    # anything added to this attrset gets symlink-joined into into `sane-scripts`
     bt-search = static-nix-shell.mkPython3Bin {
       pname = "sane-bt-search";
       src = ./src;
       pyPkgs = [ "natsort" "requests" ];
     };
+    bt-rm = static-nix-shell.mkBash {
+      pname = "sane-bt-rm";
+      src = ./src;
+      pkgs = [ "transmission" ];
+    };
     date-math = static-nix-shell.mkPython3Bin {
       pname = "sane-date-math";
       src = ./src;

pkgs/additional/sane-scripts/src/sane-bt-rm

@@ -0,0 +1,11 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p transmission
+
+# removes a torrent and trashes its data
+# usage: sane-bt-rm <torrent>
+# where <torrent> is a magnet URL, or an identifier from sane-bt-show (e.g. 132)
+
+endpoint=https://bt.uninsane.org/transmission/rpc
+PASS=$(sudo cat /run/secrets/transmission_passwd)
+
+transmission-remote "$endpoint" --auth "colin:$PASS" --torrent "$1" --remove-and-delete

pkgs/additional/static-nix-shell/default.nix

@@ -9,7 +9,49 @@ let
   inherit (builtins) attrNames attrValues concatStringsSep foldl' map typeOf;
   inherit (lib) concatMapAttrs;
   pkgs' = pkgs;
+  # create an attrset of
+  #   <name> = expected string in the nix-shell invocation
+  #   <value> = package to provide
+  pkgsToAttrs = prefix: pkgSet: expr: ({
+    "lambda" = expr: pkgsToAttrs prefix pkgSet (expr pkgSet);
+    "list" = expr: foldl' (acc: pname: acc // {
+      "${prefix + pname}" = pkgSet."${pname}";
+    }) {} expr;
+    "set" = expr: expr;
+  })."${typeOf expr}" expr;
 in {
+  mkBash = { pname, pkgs ? {}, srcPath ? pname, ...}@attrs:
+    let
+      pkgsAsAttrs = pkgsToAttrs "" pkgs' pkgs;
+      pkgsEnv = attrValues pkgsAsAttrs;
+      pkgsStr = concatStringsSep "" (map
+        (pname: " -p ${pname}")
+        (attrNames pkgsAsAttrs)
+      );
+    in stdenv.mkDerivation ({
+      version = "0.1.0";  # default version
+      patchPhase = ''
+        substituteInPlace ${srcPath} \
+          --replace '#!/usr/bin/env nix-shell' '#!${pkgs'.bash}/bin/bash' \
+          --replace \
+            '#!nix-shell -i bash -p ${pkgsStr}' \
+            '# nix deps evaluated statically'
+      '';
+      nativeBuildInputs = [ makeWrapper ];
+      installPhase = ''
+        mkdir -p $out/bin
+        mv ${srcPath} $out/bin/${srcPath}
+
+        # ensure that all nix-shell references were substituted
+        ! grep nix-shell $out/bin/${srcPath}
+
+        # add runtime dependencies to PATH
+        wrapProgram $out/bin/${srcPath} \
+          --suffix PATH : ${lib.makeBinPath pkgsEnv }
+      '';
+    } // (removeAttrs attrs [ "pkgs" "pyPkgs" "srcPath" ])
+  );
+
   # transform a file which uses `#!/usr/bin/env nix-shell` shebang with a `python3` interpreter
   # into a derivation that can be built statically.
   #
@@ -21,16 +63,6 @@ in {
   # for pyPkgs, names are assumed to be relative to `"ps"` if specified in list form.
   mkPython3Bin = { pname, pkgs ? {}, pyPkgs ? {}, srcPath ? pname, ... }@attrs:
     let
-      # create an attrset of
-      #   <name> = expected string in the nix-shell invocation
-      #   <value> = package to provide
-      pkgsToAttrs = prefix: pkgSet: expr: ({
-        "lambda" = expr: pkgsToAttrs prefix pkgSet (expr pkgSet);
-        "list" = expr: foldl' (acc: pname: acc // {
-          "${prefix + pname}" = pkgSet."${pname}";
-        }) {} expr;
-        "set" = expr: expr;
-      })."${typeOf expr}" expr;
       pyEnv = python3.withPackages (ps: attrValues (
         pkgsToAttrs "ps." ps pyPkgs
       ));