add license

inherit nit

LICENSE

@@ -0,0 +1,156 @@
+EUROPEAN UNION PUBLIC LICENCE v. 1.2
+
+EUPL © the European Union 2007, 2016
+
+This European Union Public Licence (the ‘EUPL’) applies to the Work (as defined below) which is provided under the terms of this Licence. Any use of the Work, other than as authorised under this Licence is prohibited (to the extent such use is covered by a right of the copyright holder of the Work).
+
+The Work is provided under the terms of this Licence when the Licensor (as defined below) has placed the following notice immediately following the copyright notice for the Work:
+
+Licensed under the EUPL
+
+or has expressed by any other means his willingness to license under the EUPL.
+1. Definitions
+
+In this Licence, the following terms have the following meaning:
+
+— ‘The Licence’: this Licence.
+
+— ‘The Original Work’: the work or software distributed or communicated by the Licensor under this Licence, available as Source Code and also as Executable Code as the case may be.
+
+— ‘Derivative Works’: the works or software that could be created by the Licensee, based upon the Original Work or modifications thereof. This Licence does not define the extent of modification or dependence on the Original Work required in order to classify a work as a Derivative Work; this extent is determined by copyright law applicable in the country mentioned in Article 15.
+
+— ‘The Work’: the Original Work or its Derivative Works.
+
+— ‘The Source Code’: the human-readable form of the Work which is the most convenient for people to study and modify.
+
+— ‘The Executable Code’: any code which has generally been compiled and which is meant to be interpreted by a computer as a program.
+
+— ‘The Licensor’: the natural or legal person that distributes or communicates the Work under the Licence.
+
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+2. Scope of the rights granted by the Licence
+
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+
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+
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+4. Limitations on copyright
+
+Nothing in this Licence is intended to deprive the Licensee of the benefits from any exception or limitation to the exclusive rights of the rights owners in the Work, of the exhaustion of those rights or of other applicable limitations thereto.
+5. Obligations of the Licensee
+
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+
+    Attribution right: The Licensee shall keep intact all copyright, patent or trademarks notices and all notices that refer to the Licence and to the disclaimer of warranties. The Licensee must include a copy of such notices and a copy of the Licence with every copy of the Work he/she distributes or communicates. The Licensee must cause any Derivative Work to carry prominent notices stating that the Work has been modified and the date of modification.
+    Copyleft clause: If the Licensee distributes or communicates copies of the Original Works or Derivative Works, this Distribution or Communication will be done under the terms of this Licence or of a later version of this Licence unless the Original Work is expressly distributed only under this version of the Licence — for example by communicating ‘EUPL v. 1.2 only’. The Licensee (becoming Licensor) cannot offer or impose any additional terms or conditions on the Work or Derivative Work that alter or restrict the terms of the Licence.
+    Compatibility clause: If the Licensee Distributes or Communicates Derivative Works or copies thereof based upon both the Work and another work licensed under a Compatible Licence, this Distribution or Communication can be done under the terms of this Compatible Licence. For the sake of this clause, ‘Compatible Licence’ refers to the licences listed in the appendix attached to this Licence. Should the Licensee's obligations under the Compatible Licence conflict with his/her obligations under this Licence, the obligations of the Compatible Licence shall prevail.
+    Provision of Source Code: When distributing or communicating copies of the Work, the Licensee will provide a machine-readable copy of the Source Code or indicate a repository where this Source will be easily and freely available for as long as the Licensee continues to distribute or communicate the Work.
+    Legal Protection: This Licence does not grant permission to use the trade names, trademarks, service marks, or names of the Licensor, except as required for reasonable and customary use in describing the origin of the Work and reproducing the content of the copyright notice.
+
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+
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+7. Disclaimer of Warranty
+
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+
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+
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+8. Disclaimer of Liability
+
+Except in the cases of wilful misconduct or damages directly caused to natural persons, the Licensor will in no event be liable for any direct or indirect, material or moral, damages of any kind, arising out of the Licence or of the use of the Work, including without limitation, damages for loss of goodwill, work stoppage, computer failure or malfunction, loss of data or any commercial damage, even if the Licensor has been advised of the possibility of such damage. However, the Licensor will be liable under statutory product liability laws as far such laws apply to the Work.
+9. Additional agreements
+
+While distributing the Work, You may choose to conclude an additional agreement, defining obligations or services consistent with this Licence. However, if accepting obligations, You may act only on your own behalf and on your sole responsibility, not on behalf of the original Licensor or any other Contributor, and only if You agree to indemnify, defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against such Contributor by the fact You have accepted any warranty or additional liability.
+10. Acceptance of the Licence
+
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+
+Similarly, you irrevocably accept this Licence and all of its terms and conditions by exercising any rights granted to You by Article 2 of this Licence, such as the use of the Work, the creation by You of a Derivative Work or the Distribution or Communication by You of the Work or copies thereof.
+11. Information to the public
+
+In case of any Distribution or Communication of the Work by means of electronic communication by You (for example, by offering to download the Work from a remote location) the distribution channel or media (for example, a website) must at least provide to the public the information requested by the applicable law regarding the Licensor, the Licence and the way it may be accessible, concluded, stored and reproduced by the Licensee.
+12. Termination of the Licence
+
+The Licence and the rights granted hereunder will terminate automatically upon any breach by the Licensee of the terms of the Licence.
+
+Such a termination will not terminate the licences of any person who has received the Work from the Licensee under the Licence, provided such persons remain in full compliance with the Licence.
+13. Miscellaneous
+
+Without prejudice of Article 9 above, the Licence represents the complete agreement between the Parties as to the Work.
+
+If any provision of the Licence is invalid or unenforceable under applicable law, this will not affect the validity or enforceability of the Licence as a whole. Such provision will be construed or reformed so as necessary to make it valid and enforceable.
+
+The European Commission may publish other linguistic versions or new versions of this Licence or updated versions of the Appendix, so far this is required and reasonable, without reducing the scope of the rights granted by the Licence. New versions of the Licence will be published with a unique version number.
+
+All linguistic versions of this Licence, approved by the European Commission, have identical value. Parties can take advantage of the linguistic version of their choice.
+14. Jurisdiction
+
+Without prejudice to specific agreement between parties,
+
+— any litigation resulting from the interpretation of this License, arising between the European Union institutions, bodies, offices or agencies, as a Licensor, and any Licensee, will be subject to the jurisdiction of the Court of Justice of the European Union, as laid down in article 272 of the Treaty on the Functioning of the European Union,
+
+— any litigation arising between other parties and resulting from the interpretation of this License, will be subject to the exclusive jurisdiction of the competent court where the Licensor resides or conducts its primary business.
+15. Applicable Law
+
+Without prejudice to specific agreement between parties,
+
+— this Licence shall be governed by the law of the European Union Member State where the Licensor has his seat, resides or has his registered office,
+
+— this licence shall be governed by Belgian law if the Licensor has no seat, residence or registered office inside a European Union Member State.
+Appendix
+
+‘Compatible Licences’ according to Article 5 EUPL are:
+
+— GNU General Public License (GPL) v. 2, v. 3
+
+— GNU Affero General Public License (AGPL) v. 3
+
+— Open Software License (OSL) v. 2.1, v. 3.0
+
+— Eclipse Public License (EPL) v. 1.0
+
+— CeCILL v. 2.0, v. 2.1
+
+— Mozilla Public Licence (MPL) v. 2
+
+— GNU Lesser General Public Licence (LGPL) v. 2.1, v. 3
+
+— Creative Commons Attribution-ShareAlike v. 3.0 Unported (CC BY-SA 3.0) for works other than software
+
+— European Union Public Licence (EUPL) v. 1.1, v. 1.2
+
+— Québec Free and Open-Source Licence — Reciprocity (LiLiQ-R) or Strong Reciprocity (LiLiQ-R+)
+
+The European Commission may update this Appendix to later versions of the above licences without producing a new version of the EUPL, as long as they provide the rights granted in Article 2 of this Licence and protect the covered Source Code from exclusive appropriation.
+
+All other changes or additions to this Appendix require the production of a new EUPL version.

README.md

@@ -152,5 +152,5 @@ in case you need manual control, an ides shell provides commands:
 - `restart`: do both of the above in succession
 
 ### documentation
-see [module docs](docs.md)
+see [module docs](docs/docs.md)
 

default.nix

@@ -3,12 +3,14 @@
   pkgs ? import <nixpkgs>,
   shell ? pkgs.mkShell,
   modules ? [ ],
+  auto ? true,
   ...
 }:
 # shell creation args
 {
   services ? { },
   imports ? [ ],
+  serviceDefs ? { },
   ...
 }@args:
 let
@@ -26,16 +28,13 @@ let
     modules =
       [
         # ides
-        ./ides.nix
+        ./lib/ides.nix
         # service config and build params
-        (
-          { ... }:
-          {
-            inherit services;
-            _buildIdes.shellFn = shell;
-            _buildIdes.shellArgs = shellArgs;
-          }
-        )
+        (_: {
+          inherit services serviceDefs auto;
+          _buildIdes.shellFn = shell;
+          _buildIdes.shellArgs = shellArgs;
+        })
       ]
       ++ baseModules
       ++ modules

docs.nix

@@ -1,34 +0,0 @@
-with import <nixpkgs> {};
-  {}: let
-    eval = lib.evalModules {
-      specialArgs = {inherit pkgs;};
-      modules = [./ides.nix ./modules];
-    };
-    optionsDoc = nixosOptionsDoc {
-      inherit (eval) options;
-
-      transformOptions = opt:
-        opt
-        // {
-          # Clean up declaration sites to not refer to the NixOS source tree.
-          declarations = let
-            devDir = toString /home/bolt/code/ides;
-            inherit (lib) hasPrefix removePrefix;
-          in
-            map
-            (decl:
-              if hasPrefix (toString devDir) (toString decl)
-              then let
-                subpath = removePrefix "/" (removePrefix (toString devDir) (toString decl));
-              in {
-                url = "https://git.atagen.co/atagen/ides/${subpath}";
-                name = subpath;
-              }
-              else decl)
-            opt.declarations;
-        };
-    };
-  in
-    runCommand "docs.md" {} ''
-      cat ${optionsDoc.optionsCommonMark} > $out
-    ''

docs/docs.md

@@ -1,7 +1,49 @@
+## auto
+
+Whether to autostart ides services at devshell instantiation\.
+
+
+
+*Type:*
+boolean
+
+
+
+*Default:*
+` true `
+
+*Declared by:*
+ - [lib/options\.nix](https://git.atagen.co/atagen/ides/lib/options.nix)
+
+
+
+## monitor
+
+
+
+Enable, or set timeout period for, monitoring devshell activity and automatically destroying services after (experimental)\.
+
+
+
+*Type:*
+boolean or signed integer
+
+
+
+*Default:*
+` true `
+
+*Declared by:*
+ - [lib/options\.nix](https://git.atagen.co/atagen/ides/lib/options.nix)
+
+
+
 ## serviceDefs
 
+
+
 Concrete service definitions, as per submodule options\.
-Please put service-related options into ` services ` instead, and use this to implement them\.
+Please put service-related options into ` options.services ` instead, and use this to implement those options\.
 
 
 
@@ -9,7 +51,7 @@ Please put service-related options into ` services ` instead, and use this to im
 attribute set of (submodule)
 
 *Declared by:*
- - [ides\.nix](https://git.atagen.co/atagen/ides/ides.nix)
+ - [lib/options\.nix](https://git.atagen.co/atagen/ides/lib/options.nix)
 
 
 
@@ -35,7 +77,7 @@ string
 ` "run -c %CFG% --adapter caddyfile" `
 
 *Declared by:*
- - [ides\.nix](https://git.atagen.co/atagen/ides/ides.nix)
+ - [lib/options\.nix](https://git.atagen.co/atagen/ides/lib/options.nix)
 
 
 
@@ -56,7 +98,7 @@ submodule
 ` { } `
 
 *Declared by:*
- - [ides\.nix](https://git.atagen.co/atagen/ides/ides.nix)
+ - [lib/options\.nix](https://git.atagen.co/atagen/ides/lib/options.nix)
 
 
 
@@ -87,7 +129,7 @@ null or (attribute set)
 ```
 
 *Declared by:*
- - [ides\.nix](https://git.atagen.co/atagen/ides/ides.nix)
+ - [lib/options\.nix](https://git.atagen.co/atagen/ides/lib/options.nix)
 
 
 
@@ -113,7 +155,7 @@ string
 ` "json" `
 
 *Declared by:*
- - [ides\.nix](https://git.atagen.co/atagen/ides/ides.nix)
+ - [lib/options\.nix](https://git.atagen.co/atagen/ides/lib/options.nix)
 
 
 
@@ -126,7 +168,7 @@ Path to config file\. This overrides all other values\.
 
 
 *Type:*
-null or path
+null or absolute path
 
 
 
@@ -136,10 +178,10 @@ null or path
 
 
 *Example:*
-` /home/bolt/code/ides/configs/my-config.ini `
+` "./configs/my-config.ini" `
 
 *Declared by:*
- - [ides\.nix](https://git.atagen.co/atagen/ides/ides.nix)
+ - [lib/options\.nix](https://git.atagen.co/atagen/ides/lib/options.nix)
 
 
 
@@ -167,7 +209,7 @@ null or one of “java”, “json”, “yaml”, “toml”, “ini”, “xml
 ` "json" `
 
 *Declared by:*
- - [ides\.nix](https://git.atagen.co/atagen/ides/ides.nix)
+ - [lib/options\.nix](https://git.atagen.co/atagen/ides/lib/options.nix)
 
 
 
@@ -195,7 +237,7 @@ anything
 ` "pkgs.formats.yaml {}.generate" `
 
 *Declared by:*
- - [ides\.nix](https://git.atagen.co/atagen/ides/ides.nix)
+ - [lib/options\.nix](https://git.atagen.co/atagen/ides/lib/options.nix)
 
 
 
@@ -228,7 +270,7 @@ string
 ```
 
 *Declared by:*
- - [ides\.nix](https://git.atagen.co/atagen/ides/ides.nix)
+ - [lib/options\.nix](https://git.atagen.co/atagen/ides/lib/options.nix)
 
 
 
@@ -254,7 +296,40 @@ string
 ` "caddy" `
 
 *Declared by:*
- - [ides\.nix](https://git.atagen.co/atagen/ides/ides.nix)
+ - [lib/options\.nix](https://git.atagen.co/atagen/ides/lib/options.nix)
+
+
+
+## serviceDefs\.\<name>\.path
+
+
+
+List of path options for the unit (see ` man systemd.path `) - supplied as a list due to some options allowing duplicates\.
+
+
+
+*Type:*
+attribute set of list of string
+
+
+
+*Default:*
+` { } `
+
+
+
+*Example:*
+
+```
+{
+  PathModified = [
+    "/some/path"
+  ];
+}
+```
+
+*Declared by:*
+ - [lib/options\.nix](https://git.atagen.co/atagen/ides/lib/options.nix)
 
 
 
@@ -275,7 +350,73 @@ package
 ` "pkgs.caddy" `
 
 *Declared by:*
- - [ides\.nix](https://git.atagen.co/atagen/ides/ides.nix)
+ - [lib/options\.nix](https://git.atagen.co/atagen/ides/lib/options.nix)
+
+
+
+## serviceDefs\.\<name>\.socket
+
+
+
+List of socket options for the unit (see ` man systemd.socket `) - supplied as a list due to some options allowing duplicates\.
+
+
+
+*Type:*
+attribute set of list of string
+
+
+
+*Default:*
+` { } `
+
+
+
+*Example:*
+
+```
+{
+  ListenStream = [
+    "/run/user/1000/myapp.sock"
+  ];
+}
+```
+
+*Declared by:*
+ - [lib/options\.nix](https://git.atagen.co/atagen/ides/lib/options.nix)
+
+
+
+## serviceDefs\.\<name>\.timer
+
+
+
+List of timer options for the unit (see ` man systemd.path `) - supplied as a list due to some options allowing duplicates\.
+
+
+
+*Type:*
+attribute set of list of string
+
+
+
+*Default:*
+` { } `
+
+
+
+*Example:*
+
+```
+{
+  OnActiveSec = [
+    50
+  ];
+}
+```
+
+*Declared by:*
+ - [lib/options\.nix](https://git.atagen.co/atagen/ides/lib/options.nix)
 
 
 
@@ -395,6 +536,27 @@ one of “debug”, “verbose”, “notice”, “warning”, “nothing”
 
 
 
+## services\.redis\.name
+
+
+
+The name ides uses for this service\.
+
+
+
+*Type:*
+string
+
+
+
+*Default:*
+` "redis" `
+
+*Declared by:*
+ - [modules/redis\.nix](https://git.atagen.co/atagen/ides/modules/redis.nix)
+
+
+
 ## services\.redis\.port
 
 

docs/docs.nix

@@ -0,0 +1,42 @@
+with import <nixpkgs> { };
+{ ... }:
+let
+  eval = lib.evalModules {
+    specialArgs = { inherit pkgs; };
+    modules = [
+      ../lib/ides.nix
+      ../modules
+    ];
+  };
+  optionsDoc = nixosOptionsDoc {
+    inherit (eval) options;
+
+    transformOptions =
+      opt:
+      opt
+      // {
+        # Clean up declaration sites to not refer to the NixOS source tree.
+        declarations =
+          let
+            devDir = toString /home/bolt/code/ides;
+            inherit (lib) hasPrefix removePrefix;
+          in
+          map (
+            decl:
+            if hasPrefix (toString devDir) (toString decl) then
+              let
+                subpath = removePrefix "/" (removePrefix (toString devDir) (toString decl));
+              in
+              {
+                url = "https://git.atagen.co/atagen/ides/${subpath}";
+                name = subpath;
+              }
+            else
+              decl
+          ) opt.declarations;
+      };
+  };
+in
+runCommand "docs.md" { } ''
+  cat ${optionsDoc.optionsCommonMark} > $out
+''

docs/gendocs.sh

@@ -0,0 +1,2 @@
+#!/usr/bin/env bash
+cp $(nix-build docs.nix --no-out-link) docs.md

flake.nix

@@ -1,11 +1,9 @@
 {
-  outputs =
-    { ... }:
-    {
-      lib = import ./default.nix;
-      templates.default = {
-        path = ./example;
-        description = "the ides template";
-      };
+  outputs = _: {
+    lib.use = import ./default.nix;
+    templates.default = {
+      path = ./example;
+      description = "the ides template";
     };
+  };
 }

ides.nix

@@ -1,268 +0,0 @@
-{
-  pkgs,
-  config,
-  ...
-}:
-{
-  #
-  # interface
-  #
-  options =
-    let
-      inherit (pkgs) lib;
-      inherit (lib) types mkOption;
-      serviceConfig =
-        with types;
-        submodule {
-          options = {
-            pkg = mkOption {
-              type = package;
-              description = "Package to use for service.";
-              example = "pkgs.caddy";
-            };
-            exec = mkOption {
-              type = str;
-              description = "Alternative executable name to use from `pkg`.";
-              example = "caddy";
-              default = "";
-            };
-            args = mkOption {
-              type = str;
-              description = "Arguments to supply to the service binary. Writing %CFG% in this will template to your config location.";
-              example = "run -c %CFG% --adapter caddyfile";
-              default = "";
-            };
-            config = mkOption {
-              description = "Options for setting the service's configuration.";
-              default = { };
-              type = submodule {
-                options = {
-                  text = mkOption {
-                    type = str;
-                    default = "";
-                    description = "Plaintext configuration to use.";
-                    example = ''
-                      http://*:8080 {
-                        respond "hello"
-                      }
-                    '';
-                  };
-                  ext = mkOption {
-                    type = str;
-                    default = "";
-                    description = "If your service config requires a file extension, set it here. This overrides `format`'s output path'.";
-                    example = "json";
-                  };
-                  file = mkOption {
-                    type = nullOr path;
-                    description = "Path to config file. This overrides all other values.";
-                    example = ./configs/my-config.ini;
-                    default = null;
-                  };
-                  content = mkOption {
-                    type = nullOr attrs;
-                    description = "Attributes that define your config values.";
-                    default = null;
-                    example = {
-                      this = "that";
-                    };
-                  };
-                  format = mkOption {
-                    type = nullOr (enum [
-                      "java"
-                      "json"
-                      "yaml"
-                      "toml"
-                      "ini"
-                      "xml"
-                      "php"
-                    ]);
-                    description = "Config output format.\nOne of:\n`java json yaml toml ini xml php`.";
-                    example = "json";
-                    default = null;
-                  };
-                  formatter = mkOption {
-                    type = types.anything;
-                    description = "Serialisation/writer function to apply to `content`.\n`format` will auto-apply the correct format if the option value is valid.\nShould take `path: attrs:` and return a storepath.";
-                    example = "pkgs.formats.yaml {}.generate";
-                    default = null;
-                  };
-                };
-              };
-            };
-          };
-        };
-    in
-    {
-      serviceDefs = mkOption {
-        type = types.attrsOf serviceConfig;
-        description = "Concrete service definitions, as per submodule options.\nPlease put service-related options into `services` instead, and use this to implement them.";
-      };
-
-      # lol https://github.com/NixOS/nixpkgs/issues/293510
-      _module.args = lib.mkOption {
-        internal = true;
-      };
-
-      # for internal use
-      _buildIdes = mkOption {
-        type = types.attrs;
-        internal = true;
-      };
-    };
-
-  #
-  # implementation
-  #
-  config =
-    let
-      branchOnConfig =
-        cfg:
-        {
-          text,
-          file,
-          content,
-          contentFmt,
-        }:
-        if (cfg.text != "") then
-          text
-        else if (cfg.file != null) then
-          file
-        else if (cfg.content != { }) then
-          if (cfg.format != null) then
-            content
-          else if (cfg.formatter != null) then
-            contentFmt
-          else
-            throw "`format` or `formatter` must be set for `content` ${cfg.content}!"
-        else
-          "";
-    in
-    {
-      # validate and complete the service configurations
-      _buildIdes.finalServices = builtins.mapAttrs (
-        name:
-        {
-          pkg,
-          args ? "",
-          exec ? "",
-          config,
-        }:
-        let
-          bin = if (exec == "") then pkgs.lib.getExe pkg else pkgs.lib.getExe' pkg exec;
-          ext =
-            if (config.ext != "") || (config.format != null) then "." + (config.ext or config.format) else "";
-          # we need this to create unit names that correspond to configs
-          cfgHash =
-            let
-              hashContent = builtins.hashString "sha256" (builtins.toJSON config.content);
-            in
-            branchOnConfig config {
-              text = builtins.hashString "sha256" config.text;
-              file = builtins.hashFile "sha256" config.file;
-              content = hashContent;
-              contentFmt = hashContent;
-            };
-
-          confFile =
-            let
-              writers = {
-                java = pkgs.formats.javaProperties { };
-                json = pkgs.formats.json { };
-                yaml = pkgs.formats.yaml { };
-                ini = pkgs.formats.ini { };
-                toml = pkgs.formats.toml { };
-                xml = pkgs.formats.xml { };
-                php = pkgs.formats.php { finalVariable = null; };
-              };
-              confPath = "config-${name}-${cfgHash}${ext}";
-            in
-            branchOnConfig config {
-              text = pkgs.writeText confPath config.text;
-              inherit (config) file;
-              content = writers.${config.format}.generate confPath config.content;
-              contentFmt = config.formatter confPath config.content;
-            };
-
-          finalArgs = builtins.replaceStrings [ "%CFG%" ] [ "${confFile}" ] args;
-        in
-        {
-          inherit name bin;
-          args = finalArgs;
-          unitName = "shell-${name}-${cfgHash}";
-        }
-      ) config.serviceDefs;
-
-      # generate service scripts and create the shell
-      _buildIdes.shell =
-        let
-          mkWorks =
-            {
-              name,
-              unitName,
-              bin,
-              args,
-            }:
-            {
-              runner = ''
-                echo "[ides]: Starting ${name}.."
-                systemd-run --user -G -u ${unitName} ${bin} ${args}
-              '';
-              cleaner = ''
-                echo "[ides]: Stopping ${name}.."
-                systemctl --user stop ${unitName}
-              '';
-            };
-
-          works =
-            let
-              inherit (pkgs.lib) foldlAttrs;
-            in
-            foldlAttrs
-              (
-                acc: name: svc:
-                let
-                  pair = mkWorks svc;
-                in
-                {
-                  runners = acc.runners + pair.runner;
-                  cleaners = acc.cleaners + pair.cleaner;
-                }
-              )
-              {
-                runners = "";
-                cleaners = "";
-              }
-              config._buildIdes.finalServices;
-
-          inherit (pkgs) writeShellScriptBin;
-          runners = writeShellScriptBin "ides" works.runners;
-          cleaners = writeShellScriptBin "et-tu" (
-            works.cleaners
-            + ''
-              systemctl --user reset-failed
-            ''
-          );
-          restart = writeShellScriptBin "restart" "et-tu; ides";
-
-          final =
-            let
-              shellArgs = config._buildIdes.shellArgs;
-            in
-            shellArgs
-            // {
-              nativeBuildInputs = (shellArgs.nativeBuildInputs or [ ]) ++ [
-                runners
-                cleaners
-                restart
-              ];
-              shellHook =
-                (shellArgs.shellHook or "")
-                + ''
-                  ides
-                '';
-            };
-        in
-        config._buildIdes.shellFn final;
-    };
-}

lib/build.nix

@@ -0,0 +1,215 @@
+{
+  pkgs,
+  config,
+  ...
+}:
+{
+  config =
+    let
+      # control flow monstrosity
+      branchOnConfig =
+        cfg:
+        {
+          text,
+          file,
+          content,
+          contentFmt,
+        }:
+        if (cfg.text != "") then
+          text
+        else if (cfg.file != null) then
+          file
+        else if (cfg.content != { }) then
+          if (cfg.format != null) then
+            content
+          else if (cfg.formatter != null) then
+            contentFmt
+          else
+            throw "`format` or `formatter` must be set for `content` value ${cfg.content}!"
+        else
+          "";
+    in
+    {
+      # validate and complete the service configurations
+      _buildIdes.finalServices = builtins.mapAttrs (
+        name:
+        {
+          pkg,
+          args ? "",
+          exec ? "",
+          config,
+          path,
+          socket,
+          timer,
+        }:
+        let
+          # make our best effort to use the correct binary
+          bin = if (exec == "") then pkgs.lib.getExe pkg else pkgs.lib.getExe' pkg exec;
+          # set file extension
+          ext =
+            if (config.ext != "") || (config.format != null) then "." + (config.ext or config.format) else "";
+          # config hash for unique service names
+          cfgHash =
+            let
+              # method to hash a set
+              hashContent = builtins.hashString "sha256" (builtins.toJSON config.content);
+            in
+            branchOnConfig config {
+              text = builtins.hashString "sha256" config.text;
+              file = builtins.hashFile "sha256" config.file;
+              content = hashContent;
+              contentFmt = hashContent;
+            };
+
+          confFile =
+            let
+              writers = {
+                java = pkgs.formats.javaProperties { };
+                json = pkgs.formats.json { };
+                yaml = pkgs.formats.yaml { };
+                ini = pkgs.formats.ini { };
+                toml = pkgs.formats.toml { };
+                xml = pkgs.formats.xml { };
+                php = pkgs.formats.php { finalVariable = null; };
+              };
+              # final config name
+              confPath = "config-${name}-${cfgHash}${ext}";
+            in
+            # write out config
+            branchOnConfig config {
+              text = pkgs.writeText confPath config.text;
+              inherit (config) file;
+              content = writers.${config.format}.generate confPath config.content;
+              contentFmt = config.formatter confPath config.content;
+            };
+          # template the config path into the launch command
+          cfgArgs = builtins.replaceStrings [ "%CFG%" ] [ "${confFile}" ] args;
+          # flatten unit options into cli args
+          sdArgs =
+            let
+              inherit (pkgs.lib) foldlAttrs;
+              inherit (builtins) concatStringsSep;
+              convertToArgList =
+                prefix: name: values:
+                (map (inner: "${prefix} ${name}=${inner}") values);
+              writeArgListFor =
+                attrs: prefix:
+                if (attrs != { }) then
+                  concatStringsSep " " (
+                    foldlAttrs (
+                      acc: n: v:
+                      acc + (convertToArgList prefix n v) + " "
+                    ) "" attrs
+                  )
+                else
+                  "";
+            in
+            concatStringsSep " " [
+              (writeArgListFor socket "--socket-property")
+              (writeArgListFor path "--path-property")
+              (writeArgListFor timer "--timer-property")
+            ];
+        in
+        # transform into attrs that mkWorks expects to receive
+        {
+          inherit
+            bin
+            sdArgs
+            cfgArgs
+            ;
+          unitName = "shell-${name}-${cfgHash}";
+        }
+      ) config.serviceDefs;
+
+      # generate service scripts and create the shell
+      _buildIdes.shell =
+        let
+          # create commands to run and clean up services
+          mkWorks =
+            name:
+            {
+              unitName,
+              bin,
+              cfgArgs,
+              sdArgs,
+            }:
+            {
+              runner = pkgs.writeShellScriptBin "run" ''
+                echo "[ides]: starting ${name}.."
+                systemd-run --user -q -G -u ${unitName} ${sdArgs} ${bin} ${cfgArgs}
+              '';
+              cleaner = pkgs.writeShellScriptBin "clean" ''
+                echo "[ides]: stopping ${name}.."
+                systemctl --user -q stop ${unitName}
+              '';
+              status = pkgs.writeShellScriptBin "status" ''
+                systemctl --user -q status ${unitName}
+              '';
+            };
+
+          works = pkgs.lib.mapAttrs (
+            name: serviceConf: mkWorks name serviceConf
+          ) config._buildIdes.finalServices;
+
+          # create the ides cli
+          cli = import ./cli.nix {
+            inherit (pkgs) writeShellScriptBin;
+            inherit (pkgs.lib) foldlAttrs;
+            inherit works;
+          };
+          # shell id is based on the services config
+          shellId = builtins.hashString "sha256" (builtins.toJSON config._buildIdes.finalServices);
+          monitor = import ./monitor.nix {
+            inherit (pkgs) writeShellScriptBin;
+            inherit shellId;
+            cli = pkgs.lib.getExe cli;
+            socat = pkgs.lib.getExe pkgs.socat;
+            # TODO make this timeout more lenient?
+            timeout = if (pkgs.lib.typeOf config.monitor == "int") then config.monitor else 20;
+          };
+
+          # create the ides shell
+          final =
+            let
+              inherit (config._buildIdes) shellArgs;
+            in
+            shellArgs
+            // {
+              nativeBuildInputs = (shellArgs.nativeBuildInputs or [ ]) ++ [
+                cli
+              ];
+              shellHook =
+                let
+                  autoRun =
+                    if config.auto then
+                      ''
+                        ides run
+                      ''
+                    else
+                      "";
+                  monitorRun =
+                    let
+                      inherit (pkgs.lib) getExe;
+                    in
+                    if config.monitor then
+                      ''
+                        systemd-run --user -q -G -u ides-${shellId}-monitor ${getExe monitor.daemon} $PWD
+                        ${getExe monitor.client} $$
+                      ''
+                    else
+                      "";
+                in
+                (shellArgs.shellHook or "")
+                + ''
+                  printf '[ides]: use "ides [action] [target]" to control services. type "ides help" to find out more.\n'
+                  export IDES_CTL="/run/user/$(id -u)/ides-${shellId}.sock"
+                ''
+                + autoRun
+                + monitorRun;
+            };
+        in
+        # TODO make this optionally return the shell components to allow composability with other dev shell solutions
+        config._buildIdes.shellFn final;
+    };
+
+}

lib/cli.nix

@@ -0,0 +1,198 @@
+{
+  foldlAttrs,
+  writeShellScriptBin,
+  works,
+}:
+let
+  statusFns = foldlAttrs (
+    acc: name: works:
+    acc
+    + ''
+      function status-${name}() {
+        ${works.status}/bin/status
+      }
+    ''
+  ) "" works;
+  statusAll =
+    ''
+      function status-all() {  
+    ''
+    + foldlAttrs (
+      acc: name: works:
+      acc + "${works.status}/bin/status\n"
+    ) "" works
+    + ''}'';
+  startAll =
+    ''
+      function start-all() {
+    ''
+    + foldlAttrs (
+      acc: name: works:
+      acc + "${works.runner}/bin/run\n"
+    ) "" works
+    + ''}'';
+  startFns = foldlAttrs (
+    acc: name: works:
+    acc
+    + ''
+      function start-${name}() {
+        ${works.runner}/bin/run
+      }
+    ''
+  ) "" works;
+  stopAll =
+    ''
+      function stop-all() {
+    ''
+    + foldlAttrs (
+      acc: name: works:
+      acc + "${works.cleaner}/bin/clean\n"
+    ) "" works
+    + ''
+      }
+    '';
+  stopFns = foldlAttrs (
+    acc: name: works:
+    acc
+    + ''
+      function stop-${name}() {
+        ${works.cleaner}/bin/clean
+      }
+    ''
+  ) "" works;
+  restartFns = foldlAttrs (
+    acc: name: _:
+    acc
+    + ''
+      function restart-${name} {
+        stop-${name}
+        start-${name}      
+      }
+    ''
+  ) "" works;
+  names = foldlAttrs (
+    acc: name: _:
+    acc ++ [ name ]
+  ) [ ] works;
+  mkCmd = desc: fn: synonyms: {
+    inherit desc fn synonyms;
+  };
+  actions = [
+    (mkCmd "start service" "start" [
+      "run"
+      "r"
+      "up"
+    ])
+    (mkCmd "stop service" "stop" [
+      "s"
+      "clean"
+      "et-tu"
+      "down"
+    ])
+    (mkCmd "restart a service" "restart" [
+      "qq"
+      "re"
+    ])
+    (mkCmd "show service status" "status" [
+      "stat"
+      "check"
+      "ch"
+    ])
+  ];
+  actionHelp = builtins.concatStringsSep "\n" (
+    map (cmd: ''
+      \t${cmd.fn}\t\tsynonyms: ${builtins.concatStringsSep " " cmd.synonyms}
+      \t- ${cmd.desc}
+    '') actions
+  );
+  help = ''
+    [ides]: use "ides [action] [target]" to control services.
+    actions: 
+    ${actionHelp}
+
+    \ttargets           synonyms: t
+    \t- print a list of available targets
+
+    \thelp
+    \t- print this helpful information
+
+    target names are the same as the attribute name used to define a service.
+    eg. value of service.*.name, or serviceDefs.{name}
+
+    an empty target will execute the action on all available services.
+  '';
+in
+writeShellScriptBin "ides" ''
+  targets=(${builtins.concatStringsSep " " names})
+
+  function print-help() {
+    printf '${help}'
+  }
+
+  function list-targets() {
+    echo ''${targets[@]}
+  }
+
+  function check-target() {
+    found=1
+    for target in "''${targets[@]}"; do
+      if [ "$1" == "$target" ]; then
+        found=0
+        break
+      fi
+    done
+    printf $found
+  }
+
+  ${statusFns}
+
+  ${statusAll}
+
+  ${startFns}
+
+  ${startAll}
+
+  ${stopFns}
+
+  ${stopAll}
+
+  ${restartFns}
+
+  function restart-all() {
+    stop-all
+    start-all
+  }
+
+  function action() {
+    action=$1
+    if [[ $# -gt 1 ]]; then
+      shift
+      for service in "$@"; do
+        if [[ $(check-target $service) -eq 0 ]]; then
+          $action-$service
+        else
+          echo "[ides]: no such target: $service"
+        fi
+      done
+    else
+      $action-all
+    fi
+  }
+
+  case $1 in 
+    ${builtins.concatStringsSep "\n" (
+      map (action: ''
+        ${action.fn}|${builtins.concatStringsSep "|" action.synonyms})
+          shift
+          action ${action.fn} $@
+        ;;
+      '') actions
+    )}
+    targets|t)
+      list-targets
+    ;;
+    -h|h|help|*)
+      print-help
+    ;;
+  esac
+''

lib/ides.nix

@@ -0,0 +1,9 @@
+{
+  ...
+}:
+{
+  imports = [
+    ./options.nix
+    ./build.nix
+  ];
+}

lib/monitor.nix

@@ -0,0 +1,125 @@
+{
+  socat,
+  writeShellScriptBin,
+  shellId,
+  cli,
+  timeout,
+  ...
+}:
+let
+  wait = builtins.toString timeout;
+in
+{
+  daemon = writeShellScriptBin "ides-monitor-${shellId}" ''
+    BASE_PATH="$1"
+    SOCKET=/run/user/$(id -u)/ides-${shellId}.sock
+
+    # if socket exists, it's already being monitored
+    if [ -e "$SOCKET" ]; then
+      exit 1
+    fi
+
+    PIDS=()
+
+    # loop on socket forever
+    while true; do
+      # wait to receive a PID
+      PID=$(timeout ${wait} ${socat} UNIX-LISTEN:"$SOCKET" -)
+      # if received and unique, add to our watch
+      if [ "$?" -eq 0 ] && ! [[ "''${PIDS[@]}" =~ $PID ]]; then
+        echo adding $PID to watch
+        PIDS+=($PID)
+        echo pids are now ''${PIDS[@]}
+      fi
+
+      # check process statuses
+      DEAD=true
+      for INDEX in "''${!PIDS[@]}"; do
+        REMOVE=false
+
+        # get pid
+        CHECK="''${PIDS[$INDEX]}"
+        echo checking $CHECK
+
+        # check status
+        ALIVE=$(kill -0 "$CHECK" 2>&1 > /dev/null)
+
+        # determine eligibility to act as a service root
+        if $ALIVE; then
+
+          CMD=$(cat /proc/$CHECK/comm)
+          case "$CMD" in
+            # if host is an editor, we don't care about pwd
+            code|codium|zed|emacs|intellij*|sublime*)
+              DEAD=false
+            ;;
+            # if it's a shell we really do
+            sh|bash|zsh|fish|nu|murex|*)
+              DIR=$(readlink /proc/$CHECK/cwd)
+              if [[ "$DIR" == "$BASE_PATH"* ]]; then
+                DEAD=false
+              else
+                REMOVE=true
+              fi
+            ;;
+          esac
+
+          echo found $CHECK alive with $CMD in $DIR
+          
+        else
+
+          echo found $CHECK dead
+
+          REMOVE=true
+
+        fi
+
+        if $REMOVE; then
+          echo removing ineligible pid $CHECK 
+          unset "PIDS[$INDEX]"
+        fi
+
+      done
+      
+      if "$DEAD"; then
+        echo no live pids, breaking
+        break
+      fi
+
+    done
+
+    # loop has broken, no valid pids left
+    echo stopping all!
+    ${cli} stop
+  '';
+
+  # FIXME if the client finds its parent is an editor process,
+  # such as `code`, should it keep walking pids until the final parent?
+  client = writeShellScriptBin "ides-notify-${shellId}" ''
+    function get-parent() {
+      ps --no-header -o ppid:1 $1
+    }
+
+    function get-command() {
+      cat /proc/$1/comm
+    }
+
+    SOCKET=/var/run/user/$(id -u)/ides-${shellId}.sock
+    # wait for socket to come up
+    while ! [ -e "$SOCKET" ]; do
+      sleep 0.5
+    done
+
+    # check if our calling shell's parent process is direnv
+    PARENT=$(get-parent $1)
+    COMM=$(get-command $PARENT)
+    TARGET="$1"
+    echo found $COMM as parent
+    if [[ "$COMM" == "direnv" ]]; then
+      # if so, skip up another parent to get the process it is exporting to
+      TARGET=$(get-parent $PARENT)
+    fi
+    # tell monitor about the devshell
+    echo "$TARGET" | ${socat} - UNIX-CONNECT:"$SOCKET"
+  '';
+}

lib/options.nix

@@ -0,0 +1,146 @@
+{
+  pkgs,
+  ...
+}:
+{
+  options =
+    let
+      inherit (pkgs) lib;
+      inherit (lib) types mkOption;
+      serviceConfig =
+        with types;
+        submodule {
+          options = {
+            pkg = mkOption {
+              type = package;
+              description = "Package to use for service.";
+              example = "pkgs.caddy";
+            };
+            exec = mkOption {
+              type = str;
+              description = "Alternative executable name to use from `pkg`.";
+              example = "caddy";
+              default = "";
+            };
+            args = mkOption {
+              type = str;
+              description = "Arguments to supply to the service binary. Writing %CFG% in this will template to your config location.";
+              example = "run -c %CFG% --adapter caddyfile";
+              default = "";
+            };
+            socket = mkOption {
+              type = attrsOf (listOf str);
+              description = "List of socket options for the unit (see `man systemd.socket`) - supplied as a list due to some options allowing duplicates.";
+              example = {
+                ListenStream = [ "/run/user/1000/myapp.sock" ];
+              };
+              default = { };
+            };
+            path = mkOption {
+              type = attrsOf (listOf str);
+              description = "List of path options for the unit (see `man systemd.path`) - supplied as a list due to some options allowing duplicates.";
+              example = {
+                PathModified = [ "/some/path" ];
+              };
+              default = { };
+            };
+            timer = mkOption {
+              type = attrsOf (listOf str);
+              description = "List of timer options for the unit (see `man systemd.path`) - supplied as a list due to some options allowing duplicates.";
+              example = {
+                OnActiveSec = [ 50 ];
+              };
+              default = { };
+            };
+            config = mkOption {
+              description = "Options for setting the service's configuration.";
+              default = { };
+              type = submodule {
+                options = {
+                  text = mkOption {
+                    type = str;
+                    default = "";
+                    description = "Plaintext configuration to use.";
+                    example = ''
+                      http://*:8080 {
+                        respond "hello"
+                      }
+                    '';
+                  };
+                  ext = mkOption {
+                    type = str;
+                    default = "";
+                    description = "If your service config requires a file extension, set it here. This overrides `format`'s output path'.";
+                    example = "json";
+                  };
+                  file = mkOption {
+                    type = nullOr path;
+                    description = "Path to config file. This overrides all other values.";
+                    example = "./configs/my-config.ini";
+                    default = null;
+                  };
+                  content = mkOption {
+                    type = nullOr attrs;
+                    description = "Attributes that define your config values.";
+                    default = null;
+                    example = {
+                      this = "that";
+                    };
+                  };
+                  format = mkOption {
+                    type = nullOr (enum [
+                      "java"
+                      "json"
+                      "yaml"
+                      "toml"
+                      "ini"
+                      "xml"
+                      "php"
+                    ]);
+                    description = "Config output format.\nOne of:\n`java json yaml toml ini xml php`.";
+                    example = "json";
+                    default = null;
+                  };
+                  formatter = mkOption {
+                    type = types.anything;
+                    description = "Serialisation/writer function to apply to `content`.\n`format` will auto-apply the correct format if the option value is valid.\nShould take `path: attrs:` and return a storepath.";
+                    example = "pkgs.formats.yaml {}.generate";
+                    default = null;
+                  };
+                };
+              };
+            };
+          };
+        };
+    in
+    {
+      serviceDefs = mkOption {
+        type = types.attrsOf serviceConfig;
+        description = "Concrete service definitions, as per submodule options.\nPlease put service-related options into `options.services` instead, and use this to implement those options.";
+      };
+
+      auto = mkOption {
+        type = types.bool;
+        description = "Whether to autostart ides services at devshell instantiation.";
+        default = true;
+      };
+
+      monitor = mkOption {
+        type = types.either types.bool types.int;
+        description = "Enable, or set timeout period for, monitoring devshell activity and automatically destroying services after (experimental).";
+        default = true;
+      };
+
+      # to prevent generating docs for this option; see https://github.com/NixOS/nixpkgs/issues/293510
+      _module.args = mkOption {
+        internal = true;
+      };
+
+      # for internal use
+      _buildIdes = mkOption {
+        type = types.attrs;
+        internal = true;
+      };
+    };
+
+}

modules/redis.nix

@@ -64,55 +64,64 @@
         description = "Additional config directives.";
         default = "";
       };
+
+      name = mkOption {
+        type = types.str;
+        description = "The name ides uses for this service.";
+        default = "redis";
+      };
     };
 
-  config.serviceDefs.redis =
+  config.serviceDefs =
     let
       cfg = config.services.redis;
     in
     lib.mkIf cfg.enable {
-      pkg = pkgs.redis;
-      # make sure we get the server binary, not cli
-      exec = "redis-server";
-      args = "%CFG%";
-      config = {
-        ext = ".conf";
-        # these need to be made to match redis config
-        # variable names here
-        content = {
-          inherit (cfg) bind port databases;
-          unixsocket = cfg.socket;
-          unixsocketperm = cfg.socketPerms;
-          loglevel = cfg.logLevel;
+      # use a customisable name in case the user needs several instances
+      "${cfg.name}" = {
+        pkg = pkgs.redis;
+        # make sure we get the server binary, not cli
+        exec = "redis-server";
+        args = "%CFG%";
+        config = {
+          ext = ".conf";
+          # these need to be made to match redis config
+          # variable names here
+          content = {
+            inherit (cfg) bind port databases;
+            unixsocket = cfg.socket;
+            unixsocketperm = cfg.socketPerms;
+            loglevel = cfg.logLevel;
+          };
+          # a formatter needs to take in a set of
+          # attrs and write out a file
+          formatter =
+            let
+              # set up serialisation for all types
+              serialise = {
+                int = builtins.toString;
+                bool = b: if b then "yes" else "no";
+                string = s: s;
+                path = builtins.toString;
+                null = _: _;
+                list = builtins.concatStringsSep " ";
+                float = builtins.toString;
+                set = throw "cannot serialise a set in redis format";
+                lambda = throw "cannot serialise a lambda, wtf?";
+              };
+            in
+            # create a lambda that can serialise to redis config
+            path: attrs:
+            let
+              text =
+                (lib.foldlAttrs (
+                  acc: n: v:
+                  if (v != null) then acc + "${n} ${serialise.${builtins.typeOf v} v}" + "\n" else acc
+                ) "" attrs)
+                + cfg.extraConfig;
+            in
+            (pkgs.writeText path text).outPath;
         };
-        # a formatter needs to take in a set of
-        # attrs and write out a file
-        formatter =
-          let
-            # set up serialisation for all types
-            serialise = {
-              int = builtins.toString;
-              bool = b: if b then "yes" else "no";
-              string = s: s;
-              path = builtins.toString;
-              null = _: _;
-              list = builtins.concatStringsSep " ";
-              float = builtins.toString;
-              set = throw "cannot serialise a set in redis format";
-              lambda = throw "cannot serialise a lambda, wtf?";
-            };
-          in
-          # create a lambda that can serialise to redis config
-          path: attrs:
-          let
-            text =
-              (lib.foldlAttrs (
-                acc: n: v:
-                if (v != null) then acc + "${n} ${serialise.${builtins.typeOf v} v}" + "\n" else acc
-              ) "" attrs)
-              + cfg.extraConfig;
-          in
-          (pkgs.writeText path text).outPath;
       };
     };
 }