Merge pull request input-output-hk#2926 from input-output-hk/fix/ddw-…

…1027-initial-nix-shell-command

README.md

@@ -65,6 +65,7 @@ If you get SSL error when running `nix-shell` (SSL peer certificate or SSH remot
 
 1. Run `yarn nix:selfnode` from `daedalus`.
 2. Run `yarn dev` from the subsequent `nix-shell` (use `KEEP_LOCAL_CLUSTER_RUNNING` environment variable to keep the local cluster running after Daedalus exits: `KEEP_LOCAL_CLUSTER_RUNNING=true yarn dev`)
+    1. Alternatively: run `yarn nix:selfnode yarn dev` to achieve the same thing in a single command. Note: after `yarn dev` exits, you will still remain in the `nix-shell`.
 3. Once Daedalus has started and has gotten past the loading screen run the following commands from a new terminal window if you wish to import funded wallets:
    - Byron wallets: `yarn byron:wallet:importer`
    - Shelley wallets: `yarn shelley:wallet:importer`
@@ -94,31 +95,37 @@ If you get SSL error when running `nix-shell` (SSL peer certificate or SSH remot
 
 1. Run `yarn nix:mainnet` from `daedalus`.
 2. Run `yarn dev` from the subsequent `nix-shell`
+3. Or in one command: `yarn nix:mainnet yarn dev`
 
 #### Flight
 
 1. Run `yarn nix:flight` from `daedalus`.
 2. Run `yarn dev` from the subsequent `nix-shell`
+3. Or in one command: `yarn nix:flight yarn dev`
 
 #### Testnet
 
 1. Run `yarn nix:testnet` from `daedalus`.
 2. Run `yarn dev` from the subsequent `nix-shell`
+3. Or in one command: `yarn nix:testnet yarn dev`
 
 #### Staging
 
 1. Run `yarn nix:staging` from `daedalus`.
 2. Run `yarn dev` from the subsequent `nix-shell`
+3. Or in one command: `yarn nix:staging yarn dev`
 
 #### Shelley QA
 
 1. Run `yarn nix:shelley_qa` from `daedalus`.
 2. Run `yarn dev` from the subsequent `nix-shell`
+3. Or in one command: `yarn nix:shelley_qa yarn dev`
 
 #### Alonzo Purple
 
 1. Run `yarn nix:alonzo_purple` from `daedalus`.
 2. Run `yarn dev` from the subsequent `nix-shell`
+3. Or in one command: `yarn nix:alonzo_purple yarn dev`
 
 #### Native token metadata server
 

nix/yarn-nix-shell.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+
+# This small wrapper over `nix-shell`, called from package.json
+# (e.g. `yarn nix:testnet`) allows to specify an initial command to be
+# run inside the `nix-shell` once its ready, e.g.:
+#
+# $ yarn nix:testnet yarn dev
+#
+# After the command finishes, you will still be left inside the
+# nix-shell.
+
+if [ $# -lt 2 ] ; then
+   echo >&2 'fatal: usage: '"$0"' <network> <cluster> [<initial command> ...]'
+   exit 1
+fi
+
+NETWORK="$1" ; shift
+cluster="$1" ; shift
+
+# Unfortunately, we need to shell-escape the command:
+# cf. <https://github.com/NixOS/nixpkgs/blob/877eb10cfbdb3e3d54bdc7a7f6fd3c4b4e6396da/lib/strings.nix#L310-L328>
+command=''
+while [ $# -gt 0 ] ; do
+  command="$command '""${1//\'/\'\\\'\'}""'" ; shift
+done
+
+if [ -z "$command" ] ; then
+  command=':'   # no-op, if no command
+fi
+
+export NETWORK
+# `return` will make the user stay in `nix-shell` after the initial command finishes:
+exec nix-shell --argstr nodeImplementation cardano --argstr cluster "$cluster" --command "$command ; return"

package.json

@@ -49,13 +49,13 @@
     "themes:update": "gulp build:themes && ts-node -r esm ./dist/scripts/update.js && yarn prettier --loglevel warn --write source/renderer/app/themes/daedalus/*.ts",
     "themes:copy": "ts-node -r @babel/register -r @babel/polyfill source/renderer/app/themes/utils/copyTheme.ts && yarn prettier --loglevel warn --write source/renderer/app/themes/daedalus/*.ts",
     "clear:cache": "gulp clear:cache",
-    "nix:alonzo_purple": "NETWORK=alonzo_purple nix-shell --argstr nodeImplementation cardano --argstr cluster alonzo_purple",
-    "nix:mainnet": "NETWORK=mainnet nix-shell --argstr nodeImplementation cardano --argstr cluster mainnet",
-    "nix:flight": "NETWORK=mainnet nix-shell --argstr nodeImplementation cardano --argstr cluster mainnet_flight",
-    "nix:selfnode": "NETWORK=selfnode nix-shell --argstr nodeImplementation cardano --argstr cluster selfnode",
-    "nix:shelley_qa": "NETWORK=shelley_qa nix-shell --argstr nodeImplementation cardano --argstr cluster shelley_qa",
-    "nix:staging": "NETWORK=staging nix-shell --argstr nodeImplementation cardano --argstr cluster staging",
-    "nix:testnet": "NETWORK=testnet nix-shell --argstr nodeImplementation cardano --argstr cluster testnet",
+    "nix:alonzo_purple": "./nix/yarn-nix-shell.sh alonzo_purple alonzo_purple",
+    "nix:mainnet": "./nix/yarn-nix-shell.sh mainnet mainnet",
+    "nix:flight": "./nix/yarn-nix-shell.sh mainnet mainnet_flight",
+    "nix:selfnode": "./nix/yarn-nix-shell.sh selfnode selfnode",
+    "nix:shelley_qa": "./nix/yarn-nix-shell.sh shelley_qa shelley_qa",
+    "nix:staging": "./nix/yarn-nix-shell.sh staging staging",
+    "nix:testnet": "./nix/yarn-nix-shell.sh testnet testnet",
     "byron:wallet:importer": "ts-node utils/api-importer/byron-wallet-importer.ts",
     "shelley:wallet:importer": "ts-node utils/api-importer/shelley-wallet-importer.ts",
     "mary:wallet:importer": "ts-node utils/api-importer/mary-wallet-importer.ts",