refactor: add ssh-init in entrypoint again

* feat: latest Alpine 3.23.0
* feat: latest Rsync 3.4.1-r1
* feat: integrate [rsync-docker](https://github.com/JoshPiper/rsync-docker/) 3rd party into this action as 1st party code (no more dependency, better audit, single source of truth)
   - backported:
       - agent-start
       - agent-stop
       - agent-askpass
       - agent-add
       - hosts-add
       - hosts-clear
   - new added: 
       - ssh-init
       - hosts-init
   - improved: 
     - stricter permissions on .ssh/ folder (700) and known_hosts (600)
     - use set -eu in all scipts
* feat: new ``strict_host_keys`` option to enable support for strict host key verification. Default: false (to keep backward compatibility)
* feat: new ``debug`` option to see the commands executed (-x) by this action
* feat: this action is now scanned for vulnerabilities by Snyk
* feat; this action is now scanned by CodeQL for Q/A
* feat: this action now performs CI tasks such as Validation, Linting and Unit Tests
* fix: various shell syntax for robustness
* fix: use printf and redirect output to non-stdout instead of echo in sensitive code locations
* refactor: use $HOME instead of tilde ~ for robustness
* feat: cross-platform support
* chore: Deprecate 7.0.2
* chore: EOL 7.0.0 & 7.0.1

.dockerignore

@@ -0,0 +1,5 @@
+Dockerfile
+LICENSE
+*.md
+.git*
+.github*

.editorconfig

@@ -0,0 +1,15 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+tab_width = 4
+indent_size = 4
+indent_style = space
+max_line_length = 9999
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{yml,yaml}]
+tab_width = 2
+indent_size = 2

.github/workflows/snyk-docker-vulnerability-scan.yml

@@ -30,7 +30,12 @@ jobs:
       with:
         image: burnett01/rsync-deployments
         args: --file=Dockerfile
+    - name: Output sarif file
+      run: cat snyk.sarif
+    - name: fix security-severity "null" to "0" for valid sarif format
+      run: |
+        sed -i 's/"security-severity": "null"/"security-severity": "0"/g' snyk.sarif
     - name: Upload result to GitHub Code Scanning
-      uses: github/codeql-action/upload-sarif@v3
+      uses: github/codeql-action/upload-sarif@v4
       with:
         sarif_file: snyk.sarif

Dockerfile

@@ -1,11 +1,14 @@
-# drinternet/rsync@v1.5.1
-FROM drinternet/rsync@sha256:e61f4047577b566872764fa39299092adeab691efb3884248dbd6495dc926527
+FROM alpine:3.23.0@sha256:51183f2cfa6320055da30872f211093f9ff1d3cf06f39a0bdb212314c5dc7375 AS base
+
+RUN apk update && apk add --no-cache --upgrade rsync openssh openssl busybox
 
-# always force-upgrade rsync to get the latest security fixes
-RUN apk update && apk add --no-cache --upgrade rsync
 RUN rm -rf /var/cache/apk/*
 
-# Copy entrypoint
+COPY docker-rsync/* /bin/
+RUN chmod +x /bin/agent-* /bin/ssh-* /bin/hosts-*
+
+FROM base AS build
+
 COPY entrypoint.sh /entrypoint.sh
 RUN chmod +x /entrypoint.sh
 

LICENSE

@@ -1,6 +1,7 @@
 MIT License
 
 Copyright (c) 2019-2022 Contention
+Copyright (c) 2019-2025 Joshua Piper (Dr Internet)
 Copyright (c) 2019-2025 Burnett01
 
 Permission is hereby granted, free of charge, to any person obtaining a copy

README.md

@@ -6,24 +6,28 @@
 [![Dependabot Updates](https://github.com/Burnett01/rsync-deployments/actions/workflows/dependabot/dependabot-updates/badge.svg)](https://github.com/Burnett01/rsync-deployments/actions/workflows/dependabot/dependabot-updates)
 
 
-This GitHub Action (amd64) deploys files in `GITHUB_WORKSPACE` to a remote folder via rsync over ssh. 
+This cross-platform GitHub Action deploys files in [`path`](#inputs) (relative to  `GITHUB_WORKSPACE`) to a remote folder via rsync over ssh. 
 
-Use this action in a CD workflow which leaves deployable code in `GITHUB_WORKSPACE`.
+Use this action in a CD workflow which leaves deployable code in `GITHUB_WORKSPACE`, such [actions/checkout](https://github.com/actions/checkout).
 
-The base-image [drinternet/rsync](https://github.com/JoshPiper/rsync-docker/) of this action is very small and is based on Alpine 3.22.1 (no cache) which results in fast deployments.
+The base-image of this action is very small and based on **Alpine 3.23.0** (no cache) which results in fast deployments.
 
-Alpine version: [3.22.1](https://alpinelinux.org/posts/Alpine-3.19.8-3.20.7-3.21.4-3.22.1-released.html)
-Rsync version: [3.4.1-r0](https://download.samba.org/pub/rsync/NEWS#3.4.1)
+Alpine version: [3.23.0](https://www.alpinelinux.org/posts/Alpine-3.23.0-released.html)
+Rsync version: [3.4.1-r1](https://download.samba.org/pub/rsync/NEWS#3.4.1)
 
 ---
 
 ## Inputs
 
+- `debug`* - Whether to enable debug output. ("true" / "false") - Default: "false"
+
 - `switches`* - The first is for any initial/required rsync flags, eg: `-avzr --delete`
 
 - `rsh` - Remote shell commands
 
-- `legacy_allow_rsa_hostkeys` - Enables support for legacy RSA host keys on OpenSSH 8.8+. ("true" / "false")
+- `strict_hostkeys_checking` - Enables support for strict hostkeys (fingerprint) checking. ("true" / "false") - Default: "false"
+
+- `legacy_allow_rsa_hostkeys` - Enables support for legacy RSA host keys on OpenSSH 8.8+. ("true" / "false") - Default: "false"
 
 - `path` - The source path. Defaults to GITHUB_WORKSPACE and is relative to it
 
@@ -49,7 +53,17 @@ This action needs secret variables for the ssh private key of your key pair. The
 
 For simplicity, we are using `REMOTE_*` as the secret variables throughout the examples.
 
-## Current Version: 7.1.0
+## Current Version: v8 (8.0.0)
+
+### Release channels:
+
+| Version | Purpose          | Immutable  | 
+| ------- | ------------------ | ------------------ | 
+| ``v8``  |  latest release (pointer to 8.x.x) | no, points to latest MINOR,PATCH |
+| 8.0.0  | latest major release | yes |
+| 7.1.0   | previous release | yes |
+
+Check [SECURITY.md](SECURITY.md) for support cycles.
 
 ## Example usage
 
@@ -66,9 +80,9 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v6
     - name: rsync deployments
-      uses: burnett01/rsync-deployments@7.1.0
+      uses: burnett01/rsync-deployments@v8
       with:
         switches: -avzr --delete
         path: src/
@@ -85,9 +99,9 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v6
     - name: rsync deployments
-      uses: burnett01/rsync-deployments@7.1.0
+      uses: burnett01/rsync-deployments@v8
       with:
         switches: -avzr --delete --exclude="" --include="" --filter=""
         path: src/
@@ -105,9 +119,9 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v6
     - name: rsync deployments
-      uses: burnett01/rsync-deployments@7.1.0
+      uses: burnett01/rsync-deployments@v8
       with:
         switches: -avzr --delete
         path: src/
@@ -125,9 +139,9 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v6
     - name: rsync deployments
-      uses: burnett01/rsync-deployments@7.1.0
+      uses: burnett01/rsync-deployments@v8
       with:
         switches: -avzr --delete
         path: src/
@@ -151,9 +165,9 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v6
     - name: rsync deployments
-      uses: burnett01/rsync-deployments@7.1.0
+      uses: burnett01/rsync-deployments@v8
       with:
         switches: -avzr --delete
         legacy_allow_rsa_hostkeys: "true"
@@ -238,24 +252,52 @@ More advanced examples:
 - https://github.com/Burnett01/rsync-deployments/issues/71
 - https://github.com/Burnett01/rsync-deployments/issues/52
 
+### Missing rsync on Remote Host
+
+If the action fails with "rsync: command not found" or similar errors, rsync is not installed on your remote server. Install it using your system's package manager:
+
+**Ubuntu/Debian:**
+```bash
+sudo apt-get update && sudo apt-get install rsync
+```
+
+**CentOS/RHEL/Rocky/AlmaLinux:**
+```bash
+sudo yum install rsync
+# OR on newer versions:
+sudo dnf install rsync
+```
+
+**Alpine Linux:**
+```bash
+sudo apk add rsync
+```
+
 ---
 
 ## Versions
 
-## Version 7.0.2
+## Version 7.1.0
 
 Check here: 
 
-- https://github.com/Burnett01/rsync-deployments/tree/7.0.2  (alpine 3.19.1)
+- https://github.com/Burnett01/rsync-deployments/tree/7.1.0  (alpine 3.22.1)
+  
+
+## Version 7.0.2 (DEPRECATED)
+
+Check here: 
+
+- https://github.com/Burnett01/rsync-deployments/tree/7.0.2  (alpine 3.22.1)
   
 ---
 
-## Version 7.0.0 & 7.0.1 (DEPRECATED)
+## Version 7.0.0 & 7.0.1 (EOL)
 
 Check here: 
 
 - https://github.com/Burnett01/rsync-deployments/tree/7.0.0  (alpine 3.19.1)
-- https://github.com/Burnett01/rsync-deployments/tree/7.0.1  (alpine 3.19.1)
+- https://github.com/Burnett01/rsync-deployments/tree/7.0.1  (alpine 3.22.1)
   
 ---
 

SECURITY.md

@@ -1,21 +1,30 @@
 # Security Policy
 
+The Docker image and code quality are regularly checked for vulnerabilities and CVEs by Snyk and CodeQL.
+
 ## Supported Versions
 
 The following versions are currently being supported with security updates:
 
-| Version | Supported          | Rsync version          |
-| ------- | ------------------ | ------------------ |
-| 7.1.0  | :white_check_mark: | >= 3.4.1 |
-| 7.0.2   | :white_check_mark: | >= 3.4.0 |
-| 7.0.1   | :warning: DEPRECATED | < 3.4.0 |
-| 7.0.0   | :warning: DEPRECATED | < 3.4.0|
-| 6.x   | :x: EOL |< 3.4.0|
-| 5.x   | :x: EOL |< 3.4.0|
-| 4.x   | :x: EOL |< 3.4.0|
-| 3.0   | :x: EOL |< 3.4.0|
-| 2.0   | :x: EOL               |< 3.4.0|
-| 1.0   | :x: EOL               |< 3.4.0|
+| Version | Supported          | Rsync version          | Alpine version          |
+| ------- | ------------------ | ------------------ | ------------------ |
+| 8.0.0  | :white_check_mark: | >= 3.4.1-r1 | 3.23.0 |
+| 7.1.0  | :white_check_mark: | >= 3.4.1-r0 | 3.22.1 |
+| 7.0.2   | :warning: DEPRECATED | >= 3.4.0-r0 | 3.22.1 |
+| 7.0.1   | :x: EOL | < 3.4.0 | 3.22.1 |
+| 7.0.0   | :x: EOL | < 3.4.0| 3.19.1 |
+| 6.x   | :x: EOL |< 3.4.0| 3.17.2 |
+| 5.x   | :x: EOL |< 3.4.0| 3.11 - 3.14.1 - 3.15 - 3.16 - 3.17.2 |
+| 4.x   | :x: EOL |< 3.4.0| 3.11 |
+| 3.0   | :x: EOL |< 3.4.0| N/A |
+| 2.0   | :x: EOL               |< 3.4.0| Ubuntu |
+| 1.0   | :x: EOL               |< 3.4.0| Ubuntu |
+
+### Terminology
+
+EOL = End of life (no support/no updates)
+
+DEPRECATED = Close to EOL (support/no updates)
 
 ## Reporting a Vulnerability
 

action.yml

@@ -13,6 +13,10 @@ inputs:
     description: 'Enables support for legacy RSA host keys on OpenSSH 8.8+'
     required: false
     default: 'false'
+  strict_hostkeys_checking:
+    description: 'Controls strict host keys checking'
+    required: false
+    default: 'false'
   path:
     description: 'The local path'
     required: false
@@ -37,6 +41,10 @@ inputs:
     description: 'The remote key passphrase'
     required: false
     default: ''
+  debug:
+    description: 'Debug the action'
+    required: false
+    default: 'false'
 runs:
   using: 'docker'
   image: 'Dockerfile'

docker-rsync/README.md

@@ -0,0 +1,40 @@
+# Scripts
+
+Shell-scripts to help with managing SSH agents and known hosts files.
+
+### SSH Management
+
+#### ssh-init
+This command create the ``$HOME/.ssh`` folder with default permissions ``700``.
+
+### SSH-Agent Management
+
+#### agent-start
+This command starts the SSH agent, if it isn't already started (SSH_AGENT_PID set or ssh agent ID file found).
+It takes one optional argument, for the name of the agent to be started. Defaults to "default".
+This program needs to be source'd to work correctly.
+`source agent-start "default"`
+
+#### agent-stop
+This command stops the SSH agent, if it is started (SSH_AGENT_PID set or ssh agent ID file found).
+It takes one optional argument, for the name of the agent to be stopped. Defaults to "default".
+`agent-stop "my-agent-name"`
+
+#### agent-add
+This command adds a key to the currently running SSH agent. The key is taken from stdin, and the agent used is that in SSH_AGENT_PID.
+
+#### agent-askpass
+This command is called by ssh-add when the [SSH_ASKPASS](https://man.openbsd.org/ssh-add.1#ENVIRONMENT) variable is set active. The command returns the SSH_PASS to [ssh-askpass(1)](https://man.openbsd.org/ssh-askpass.1).
+
+This command is ignored by ssh-add if the key does not require a passphrase.
+
+### known_hosts management
+
+#### hosts-init
+This command creates the known_hosts file (``$HOME/.ssh/known_hosts``) with default permission ``600``.
+
+#### hosts-add
+This command adds an entry to the known hosts file, and ensures its permissions are correct. It takes one argument, which is the new key to add.
+
+#### hosts-clear
+This command truncates the known_hosts file.

docker-rsync/agent-add

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+set -eu
+
+source agent-start "${1:-default}"
+cat - | tr -d '\r' | DISPLAY=1 SSH_ASKPASS=agent-askpass ssh-add - >/dev/null

docker-rsync/agent-askpass

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+set -eu
+
+echo "$SSH_PASS"

docker-rsync/agent-start

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+set -eu
+
+FOLDER=${1:-default}
+STORE_PATH="/tmp/ssh-agent/$FOLDER"
+mkdir -p "$STORE_PATH"
+
+if [ -z "${SSH_AGENT_PID:-}" ]; then
+	if [ -f "$STORE_PATH/id" ]; then
+		SSH_AGENT_PID=$(cat "$STORE_PATH/id")
+		export SSH_AGENT_PID
+
+		SSH_AUTH_SOCK=$(cat "$STORE_PATH/sock")
+		export SSH_AUTH_SOCK
+	else
+		eval "$(ssh-agent)" > /dev/null
+		echo "$SSH_AGENT_PID" > "$STORE_PATH"/id
+		echo "$SSH_AUTH_SOCK" > "$STORE_PATH"/sock
+	fi
+fi

docker-rsync/agent-stop

@@ -0,0 +1,37 @@
+#!/bin/sh
+
+set -eu
+
+if [ ! -z "$SSH_AGENT_PID" ]; then
+	# Here, the environment is set already, just kill the script.
+	eval $(ssh-agent -k) >/dev/null
+	exit $?
+else
+	# The env isn't set, construct the file path.
+	FOLDER=${1:-default}
+	STORE_PATH="/tmp/ssh-agent/$FOLDER"
+	if [ ! -d "$STORE_PATH" ]; then
+		echo "Store Path $STORE_PATH doesn't exist!" >&2
+		exit 1
+	fi
+
+	# And check our files exist.
+	if [ -f "$STORE_PATH/id" ]; then
+		# Grab our PID and socket.
+		SSH_AGENT_PID=$(cat "$STORE_PATH/id")
+		export SSH_AGENT_PID
+		rm "$STORE_PATH/id"
+
+		SSH_AUTH_SOCK=$(cat "$STORE_PATH/sock")
+		export SSH_AUTH_SOCK
+		rm "$STORE_PATH/sock"
+
+
+		rmdir "$STORE_PATH"
+		eval $(ssh-agent -k) >/dev/null
+		exit $?
+	else
+		echo "SSH_AGENT_PID not set, $STORE_PATH/id doesn't exist!" >&2
+		exit 1
+	fi
+fi

docker-rsync/hosts-add

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+set -eu
+
+printf '%s\n' "$@" >> $HOME/.ssh/known_hosts

docker-rsync/hosts-clear

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+set -eu
+
+truncate -s 0 $HOME/.ssh/known_hosts

docker-rsync/hosts-init

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+set -eu
+
+touch $HOME/.ssh/known_hosts
+chmod 600 $HOME/.ssh/known_hosts

docker-rsync/ssh-init

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+set -eu
+
+mkdir -m 700 $HOME/.ssh

entrypoint.sh

@@ -1,25 +1,55 @@
 #!/bin/sh
 
+set -eu
+
+if [ "${INPUT_DEBUG:-false}" = "true" ]; then
+    set -x
+fi
+
 if [ -z "$(echo "$INPUT_REMOTE_PATH" | awk '{$1=$1};1')" ]; then
     echo "The remote_path can not be empty. see: github.com/Burnett01/rsync-deployments/issues/44"
     exit 1
 fi
 
+# Initialize SSH and known hosts.
+source ssh-init
+source hosts-init
+
 # Start the SSH agent and load key.
 source agent-start "$GITHUB_ACTION"
 echo "$INPUT_REMOTE_KEY" | SSH_PASS="$INPUT_REMOTE_KEY_PASS" agent-add
 
-# Add strict errors.
-set -eu
-
 # Variables.
-LEGACY_RSA_HOSTKEYS="-o HostKeyAlgorithms=+ssh-rsa -o PubkeyAcceptedKeyTypes=+ssh-rsa"
-LEGACY_RSA_HOSTKEYS=$([ "$INPUT_LEGACY_ALLOW_RSA_HOSTKEYS" = "true" ] && echo "$LEGACY_RSA_HOSTKEYS" || echo "")
+LEGACY_RSA_HOSTKEYS=""
+if [ "${INPUT_LEGACY_ALLOW_RSA_HOSTKEYS:-false}" = "true" ]; then
+    LEGACY_RSA_HOSTKEYS="-o HostKeyAlgorithms=+ssh-rsa -o PubkeyAcceptedKeyTypes=+ssh-rsa"
+fi
 
-SWITCHES="$INPUT_SWITCHES"
-RSH="ssh -o StrictHostKeyChecking=no $LEGACY_RSA_HOSTKEYS -p $INPUT_REMOTE_PORT $INPUT_RSH"
+STRICT_HOSTKEYS_CHECKING="-o StrictHostKeyChecking=no"
+if [ "${INPUT_STRICT_HOSTKEYS_CHECKING:-false}" = "true" ]; then
+    STRICT_HOSTKEYS_CHECKING="-o UserKnownHostsFile=$HOME/.ssh/known_hosts -o StrictHostKeyChecking=yes"
+
+    key="$(ssh-keyscan -p "$INPUT_REMOTE_PORT" "$INPUT_REMOTE_HOST" 2>/dev/null | sed '/^#/d')" || key=""
+    if [ -n "$key" ]; then
+        # fingerprint verification
+        echo "$key" | ssh-keygen -lf -
+        # add to known hosts
+        echo "$key" | while IFS= read -r line; do hosts-add "$line"; done
+    else
+        echo "Warning: failed to fetch host key for $INPUT_REMOTE_HOST" >&2
+        exit 1
+    fi
+fi
+
+RSH="ssh $STRICT_HOSTKEYS_CHECKING $LEGACY_RSA_HOSTKEYS -p $INPUT_REMOTE_PORT $INPUT_RSH"
 LOCAL_PATH="$GITHUB_WORKSPACE/$INPUT_PATH"
 DSN="$INPUT_REMOTE_USER@$INPUT_REMOTE_HOST"
 
 # Deploy.
-sh -c "rsync $SWITCHES -e '$RSH' $LOCAL_PATH $DSN:$INPUT_REMOTE_PATH"
+sh -c "rsync $INPUT_SWITCHES -e '$RSH' $LOCAL_PATH $DSN:$INPUT_REMOTE_PATH"
+
+# Clean up.
+source agent-stop "$GITHUB_ACTION"
+source hosts-clear
+
+exit 0

test/entrypoint.bats

@@ -1,12 +1,13 @@
 #!/usr/bin/env bats
 
 setup() {
-    # Create a dummy ssh agent and agent-add for sourcing
+    # Create dummy binaries for sourcing
+    echo 'echo "source"' > source
     echo 'echo "agent started"' > agent-start
     echo 'echo "key added"' > agent-add
-    chmod +x agent-start agent-add
+    chmod +x source agent-start agent-add
 
-    # Create a dummy rsync to capture its arguments
+    # Create dummy rsync binary to capture its arguments
     echo 'echo "rsync $@"' > rsync
     chmod +x rsync
 
@@ -14,7 +15,7 @@ setup() {
 }
 
 teardown() {
-    rm -f agent-start agent-add rsync
+    rm -f source agent-start agent-add rsync ssh-keyscan hosts-add
 }
 
 @test "fails if INPUT_REMOTE_PATH is empty" {
@@ -35,13 +36,14 @@ teardown() {
     export INPUT_RSH=""
     export INPUT_PATH=""
     export INPUT_REMOTE_USER="user"
-    export INPUT_REMOTE_HOST="host"
+    export INPUT_REMOTE_HOST="localhost.local"
     export GITHUB_WORKSPACE="/tmp"
-    export DSN="user@host"
+    export DSN="user@localhost.local"
     export LOCAL_PATH="/tmp/"
 
     run ./entrypoint.sh
-    [[ "${output}" == *"HostKeyAlgorithms=+ssh-rsa"* ]]
+
+    [[ "${output}" == *"rsync -avz -e ssh -o StrictHostKeyChecking=no -o HostKeyAlgorithms=+ssh-rsa -o PubkeyAcceptedKeyTypes=+ssh-rsa -p 22  /tmp/ user@localhost.local:remote/"* ]]
 }
 
 @test "does not include legacy RSA switches when not allowed" {
@@ -55,11 +57,72 @@ teardown() {
     export INPUT_RSH=""
     export INPUT_PATH=""
     export INPUT_REMOTE_USER="user"
-    export INPUT_REMOTE_HOST="host"
+    export INPUT_REMOTE_HOST="localhost.local"
     export GITHUB_WORKSPACE="/tmp"
-    export DSN="user@host"
+    export DSN="user@localhost.local"
     export LOCAL_PATH="/tmp/"
 
     run ./entrypoint.sh
-    [[ "${output}" != *"HostKeyAlgorithms=+ssh-rsa"* ]]
+    [[ "${output}" == *"rsync -avz -e ssh -o StrictHostKeyChecking=no  -p 22  /tmp/ user@localhost.local:remote/"* ]]
+}
+
+@test "includes STRICT_HOSTKEYS_CHECKING switches when allowed" {
+    # Set a fake HOME dir
+    local -r HOME="/tmp"
+
+    export INPUT_LEGACY_ALLOW_RSA_HOSTKEYS="false"
+    export INPUT_STRICT_HOSTKEYS_CHECKING="true"
+    export INPUT_REMOTE_PATH="remote/"
+    export INPUT_REMOTE_KEY="dummy"
+    export INPUT_REMOTE_KEY_PASS="dummy"
+    export GITHUB_ACTION="dummy"
+    export INPUT_SWITCHES="-avz"
+    export INPUT_REMOTE_PORT="22"
+    export INPUT_RSH=""
+    export INPUT_PATH=""
+    export INPUT_REMOTE_USER="user"
+    export INPUT_REMOTE_HOST="localhost.local"
+    export GITHUB_WORKSPACE="/tmp"
+    export DSN="user@localhost.local"
+    export LOCAL_PATH="/tmp/"
+
+    # Generate a mock key pair to test ssh-keyscan (entrypoint.sh:32)
+    rm -f "$HOME/mockKeyPair" "$HOME/mockKeyPair.pub" \
+    && ssh-keygen -t ed25519 -f "$HOME/mockKeyPair" -N '' -q -C '' \
+    && mockPublicKey=$(< "$HOME/mockKeyPair.pub")
+
+    # Create dummy ssh-keyscan binary to return $mockPublicKey
+    echo "echo 'localhost.local $mockPublicKey #Mock 1'" > ssh-keyscan
+    chmod +x ssh-keyscan
+
+    # Create dummy hosts-add binary to capture its arguments
+    echo 'echo "hosts-add $@"' > hosts-add
+    chmod +x hosts-add
+    
+    run ./entrypoint.sh
+
+    [[ "${output}" == *"hosts-add localhost.local ssh-ed25519"* ]]
+    [[ "${output}" == *"rsync -avz -e ssh -o UserKnownHostsFile=/tmp/.ssh/known_hosts -o StrictHostKeyChecking=yes  -p 22  /tmp/ user@localhost.local:remote/"* ]]
+}
+
+@test "does not includes STRICT_HOSTKEYS_CHECKING switches when not allowed" {
+    export INPUT_LEGACY_ALLOW_RSA_HOSTKEYS="false"
+    export INPUT_STRICT_HOSTKEYS_CHECKING="false"
+    export INPUT_REMOTE_PATH="remote/"
+    export INPUT_REMOTE_KEY="dummy"
+    export INPUT_REMOTE_KEY_PASS="dummy"
+    export GITHUB_ACTION="dummy"
+    export INPUT_SWITCHES="-avz"
+    export INPUT_REMOTE_PORT="22"
+    export INPUT_RSH=""
+    export INPUT_PATH=""
+    export INPUT_REMOTE_USER="user"
+    export INPUT_REMOTE_HOST="localhost.local"
+    export GITHUB_WORKSPACE="/tmp"
+    export DSN="user@localhost.local"
+    export LOCAL_PATH="/tmp/"
+    
+    run ./entrypoint.sh
+
+    [[ "${output}" == *"rsync -avz -e ssh -o StrictHostKeyChecking=no  -p 22  /tmp/ user@localhost.local:remote/"* ]]
 }