feat(inputs): totp support (#47)

Author: eyzi

README.md

@@ -30,6 +30,8 @@ In order to configure this action, configure a step that looks like the followin
 
 _(The parameters are explained below)_
 
+Option A. Using MFA files
+
 ```yaml
 jobs:
   deployToSteam:
@@ -50,6 +52,31 @@ jobs:
           releaseBranch: prerelease
 ```
 
+Option B. Using TOTP
+
+```yaml
+jobs:
+  deployToSteam:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: CyberAndrii/steam-totp@v1
+        name: Generate TOTP
+        id: steam-totp
+        with:
+          shared_secret: ${{ secrets.STEAM_SHARED_SECRET }}
+      - uses: game-ci/steam-deploy@v1
+        with:
+          username: ${{ secrets.STEAM_USERNAME }}
+          password: ${{ secrets.STEAM_PASSWORD }}
+          totp: ${{ steps.steam-totp.outputs.code }}
+          appId: 1234560
+          buildDescription: v1.2.3
+          rootPath: build
+          depot1Path: StandaloneWindows64
+          depot2Path: StandaloneLinux64
+          releaseBranch: prerelease
+```
+
 ## Configuration
 
 #### username
@@ -60,9 +87,13 @@ The username of the Steam Build Account that you created in setup step 1.
 
 The password of the Steam Build Account that you created in setup step 1.
 
+#### totp
+
+Deploying to Steam using TOTP. If this is not passed, `configVdf`, `ssfnFileName`, and `ssfnFileContents` are required.
+
 #### configVdf, ssfnFileName, and ssfnFileContents
 
-Deploying to Steam requires using Multi-Factor Authentication (MFA) through Steam Guard. 
+Deploying to Steam requires using Multi-Factor Authentication (MFA) through Steam Guard unless `totp` is passed.
 This means that simply using username and password isn't enough to authenticate with Steam. 
 However, it is possible to go through the MFA process only once by setting up GitHub Secrets for configVdf, ssfnFileName, and ssfnFileContents with these steps:
 1. Install [Valve's offical steamcmd](https://partner.steamgames.com/doc/sdk/uploading#1) on your local machine. All following steps will also be done on your local machine.

action.yml

@@ -10,18 +10,18 @@ inputs:
     required: true
     default: ''
     description: 'The password of your builder account.'
+  totp:
+    required: false
+    description: 'The TOTP to use for login. If set, `configVdf`, `ssfnFileName`, and `ssfnFileContents` will be ignored.'
   configVdf:
-    required: true
-    default: ''
-    description: 'The contents of STEAM_HOME/config/config.vdf.'
+    required: false
+    description: 'The contents of STEAM_HOME/config/config.vdf. Required if `totp` is not set.'
   ssfnFileName:
-    required: true
-    default: ''
-    description: 'The basename of the STEAM_HOME/ssfn file.'
+    required: false
+    description: 'The basename of the STEAM_HOME/ssfn file. Required if `totp` is not set.'
   ssfnFileContents:
-    required: true
-    default: ''
-    description: 'The contents of the file at STEAM_HOME/ssfnFileName.'
+    required: false
+    description: 'The contents of the file at STEAM_HOME/ssfnFileName. Required if `totp` is not set.'
   appId:
     required: true
     default: ''
@@ -80,6 +80,7 @@ runs:
         STEAM_CMD: ${{ steps.setup-steamcmd.outputs.executable }}
         steam_username: ${{ inputs.username }}
         steam_password: ${{ inputs.password }}
+        steam_totp: ${{ inputs.totp }}
         configVdf: ${{ inputs.configVdf }}
         ssfnFileName: ${{ inputs.ssfnFileName }}
         ssfnFileContents: ${{ inputs.ssfnFileContents }}

steam_deploy.sh

@@ -86,34 +86,47 @@ EOF
 cat manifest.vdf
 echo ""
 
-echo ""
-echo "#################################"
-echo "#    Copying SteamGuard Files   #"
-echo "#################################"
-echo ""
+if [ -n "$steam_totp" ]; then
+  echo ""
+  echo "#################################"
+  echo "#     Using SteamGuard TOTP     #"
+  echo "#################################"
+  echo ""
+else
+  if [ ! -n "$configVdf" ] || [ ! -n "$ssfnFileName" ] || [ ! -n "$ssfnFileContents" ]; then
+    echo "MFA inputs are missing or incomplete! Cannot proceed."
+    exit 1
+  fi
 
-echo "Steam is installed in: $steamdir"
+  echo ""
+  echo "#################################"
+  echo "#    Copying SteamGuard Files   #"
+  echo "#################################"
+  echo ""
 
-mkdir -p "$steamdir/config"
+  echo "Steam is installed in: $steamdir"
 
-echo "Copying $steamdir/config/config.vdf..."
-echo "$configVdf" | base64 -d > "$steamdir/config/config.vdf"
-chmod 777 "$steamdir/config/config.vdf"
+  mkdir -p "$steamdir/config"
 
-echo "Copying $steamdir/ssfn..."
-echo "$ssfnFileContents" | base64 -d > "$steamdir/$ssfnFileName"
-chmod 777 "$steamdir/$ssfnFileName"
+  echo "Copying $steamdir/config/config.vdf..."
+  echo "$configVdf" | base64 -d > "$steamdir/config/config.vdf"
+  chmod 777 "$steamdir/config/config.vdf"
 
-echo "Finished Copying SteamGuard Files!"
-echo ""
+  echo "Copying $steamdir/ssfn..."
+  echo "$ssfnFileContents" | base64 -d > "$steamdir/$ssfnFileName"
+  chmod 777 "$steamdir/$ssfnFileName"
+
+  echo "Finished Copying SteamGuard Files!"
+  echo ""
+fi
 
 echo ""
 echo "#################################"
 echo "#        Uploading build        #"
 echo "#################################"
 echo ""
 
-$STEAM_CMD +login "$steam_username" "$steam_password" +run_app_build $manifest_path +quit || (
+$STEAM_CMD +login "$steam_username" "$steam_password" "$steam_totp" +run_app_build $manifest_path +quit || (
     echo ""
     echo "#################################"
     echo "#             Errors            #"