ds

README.md

@@ -5,15 +5,23 @@ A system management tool for server operations, written in C++.
 ## Installation
 
 ```
-curl -fsSL https://gitea.jde.nz/public/dropshell/releases/download/latest/install.sh | sudo bash
+curl -fsSL https://gitea.jde.nz/public/dropshell/releases/download/latest/install.sh | bash
 ```
 
-This installs as dropshell, with a symlink ds if the ds command does not already exist.
+This installs as dropshell for the local user, with a symbolic link ds.
+You'll need to run:
+```
+~/.local/bin/dropshell edit
+~/.local/bin/dropshell install
+source ~/.bashrc
+```
+to configure dropshell and install the local components.
 
-## Installation of Agent
+## Remote Server Setup
 
-Install the Agent on each server you wish to manage. Supports amd64 (x86_64) and arm64 (aarch64) architectures.
+### Initial setup
 
+Auto setup script which creates a dropshell user, and includes installing docker if not already present:
 ```
 curl -fsSL https://gitea.jde.nz/public/dropshell/releases/download/latest/server_autosetup.sh | sudo bash
 ```
@@ -26,7 +34,21 @@ Manual steps:
 1. Test ssh'ing into the server.
 
 
-## Install Services
+### Configure and Use Remote Server
 
-Set up a server and install a service:
-1. `ds create-server SERVERNAME`
+#### Add to local dropshell configuration, and install remote agent
+Back on the dropshell host:
+1. `dropshell create-server SERVERNAME`
+1. `dropshell edit SERVERNAME`
+1. `dropshell install SERVERNAME`
+
+#### Install Services
+Create and install a service
+1. `ds template list`  -- see what templates are available to install.
+1. `ds create-service SERVERNAME SERVICENAME TEMPLATE`
+1. `ds edit SERVERNAME SERVICENAME`
+1. Edit other config files if needed.
+1. `ds install SERVERNAME SERVICENAME`
+1. `ds list`
+
+The service should now be seen to be running.

install.sh

@@ -3,12 +3,6 @@ set -e
 
 # download and install dropshell
 
-# Check if running as root
-if [ "$EUID" -ne 0 ]; then
-    echo "Please run this script as root (use sudo)"
-    exit 1
-fi
-
 # 1. Determine architecture
 # ----------------------------------------------------------------------------- 
 
@@ -30,21 +24,26 @@ trap 'rm -rf "$TMPDIR"' EXIT
 URL="https://gitea.jde.nz/public/dropshell/releases/download/latest/$BIN"
 echo "Downloading $BIN from $URL..."
 
-curl -fsSL -o "$TMPDIR/dropshell" "$URL"
+TARGET_PATH="${HOME}/.local/bin/dropshell"
 
-if [ ! -f "$TMPDIR/dropshell" ]; then
+mkdir -p "${HOME}/.local/bin"
+
+curl -fsSL -o "$TARGET_PATH" "$URL"
+
+if [ ! -f "$TARGET_PATH" ]; then
     echo "Failed to download dropshell" >&2
     exit 1
 fi
 
-chmod +x "$TMPDIR/dropshell"
+chmod +x "$TARGET_PATH"
 
-cp "$TMPDIR/dropshell" /usr/local/bin/dropshell
-if [ -f /usr/local/bin/ds ]; then
-    rm -f /usr/local/bin/ds
+if [ ! -f "${HOME}/.local/bin/ds" ]; then
+    ln -s "$TARGET_PATH" "${HOME}/.local/bin/ds"
 fi
-ln -s /usr/local/bin/dropshell /usr/local/bin/ds
-rm -rf "$TMPDIR"
 
-echo "dropshell installed successfully to /usr/local/bin/dropshell"
+echo "dropshell installed successfully to $TARGET_PATH"
 
+echo "Please:"
+echo "1. run '${TARGET_PATH} edit' to edit the configuration."
+echo "2. run '${TARGET_PATH} install' to install dropshell components on this computer."
+echo "3. run 'source ~/.bashrc' to add to your path and autocomplete for the current shell."

source/CMakeLists.txt

@@ -97,81 +97,32 @@ FetchContent_Declare(
 )
 FetchContent_MakeAvailable(cpptrace)
 
+# Add cpp-httplib
+FetchContent_Declare(
+  cpp-httplib
+  GIT_REPOSITORY https://github.com/yhirose/cpp-httplib.git
+  GIT_TAG        v0.14.1
+)
+FetchContent_MakeAvailable(cpp-httplib)
+
+# Add nlohmann/json
+FetchContent_Declare(
+  nlohmann_json
+  GIT_REPOSITORY https://github.com/nlohmann/json.git
+  GIT_TAG        v3.11.3
+)
+FetchContent_MakeAvailable(nlohmann_json)
+
 # Link libraries
 target_link_libraries(dropshell PRIVATE
     libassert::assert
     cpptrace::cpptrace
+    httplib::httplib
+    nlohmann_json::nlohmann_json
 )
 
 # Install targets
 install(TARGETS dropshell
-    RUNTIME DESTINATION bin
+    RUNTIME DESTINATION $ENV{HOME}/.local/bin
 )
 
-# Create symbolic link 'ds' pointing to 'dropshell'
-install(CODE "
-    message(STATUS \"Checking if 'ds' command already exists...\")
-    execute_process(
-        COMMAND which ds
-        RESULT_VARIABLE DS_NOT_EXISTS
-        OUTPUT_QUIET
-        ERROR_QUIET
-    )
-    if(DS_NOT_EXISTS)
-        message(STATUS \"Command 'ds' does not exist. Creating symlink.\")
-        execute_process(
-            COMMAND ${CMAKE_COMMAND} -E create_symlink 
-            \${CMAKE_INSTALL_PREFIX}/bin/dropshell
-            \${CMAKE_INSTALL_PREFIX}/bin/ds
-        )
-    else()
-        message(STATUS \"Command 'ds' already exists. Skipping symlink creation.\")
-    endif()
-")
-
-# Install completion script
-install(FILES src/dropshell-completion.bash
-    DESTINATION /etc/bash_completion.d
-    RENAME dropshell
-)
-
-# Create a symlink for the completion script to work with 'ds' command
-install(CODE "
-    # First check if 'ds' command exists after our installation
-    execute_process(
-        COMMAND which ds
-        RESULT_VARIABLE DS_NOT_EXISTS
-        OUTPUT_VARIABLE DS_PATH
-        ERROR_QUIET
-        OUTPUT_STRIP_TRAILING_WHITESPACE
-    )
-    
-    # Only proceed if 'ds' exists
-    if(NOT DS_NOT_EXISTS)
-        # Check if 'ds' is a symlink pointing to dropshell
-        execute_process(
-            COMMAND readlink -f \${DS_PATH}
-            RESULT_VARIABLE READLINK_FAILED
-            OUTPUT_VARIABLE REAL_PATH
-            ERROR_QUIET
-            OUTPUT_STRIP_TRAILING_WHITESPACE
-        )
-        
-        # Get the path to our dropshell binary
-        set(DROPSHELL_PATH \${CMAKE_INSTALL_PREFIX}/bin/dropshell)
-        
-        # Check if the real path is our dropshell binary
-        if(NOT READLINK_FAILED AND \"\${REAL_PATH}\" STREQUAL \"\${DROPSHELL_PATH}\")
-            message(STATUS \"Command 'ds' exists and points to dropshell. Creating completion script symlink.\")
-            execute_process(
-                COMMAND ${CMAKE_COMMAND} -E create_symlink 
-                /etc/bash_completion.d/dropshell
-                /etc/bash_completion.d/ds
-            )
-        else()
-            message(STATUS \"Command 'ds' exists but doesn't point to dropshell. Skipping completion symlink.\")
-        endif()
-    else()
-        message(STATUS \"Command 'ds' not found. Skipping completion symlink.\")
-    endif()
-")

source/build.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
+
 # Exit on error
 set -e
 
@@ -53,24 +55,6 @@ if ! command -v make &> /dev/null; then
     exit 1
 fi
 
-# Check if pkg-config is installed
-if ! command -v pkg-config &> /dev/null; then
-    print_error "pkg-config is not installed. Please install pkg-config first."
-    print_warning "On Ubuntu/Debian: sudo apt-get install pkg-config"
-    print_warning "On Fedora: sudo dnf install pkg-config"
-    print_warning "On Arch: sudo pacman -S pkg-config"
-    exit 1
-fi
-
-# Check if ncurses is installed
-if ! pkg-config --exists ncurses; then
-    print_error "ncurses is not installed. Please install ncurses first."
-    print_warning "On Ubuntu/Debian: sudo apt-get install libncurses-dev"
-    print_warning "On Fedora: sudo dnf install ncurses-devel"
-    print_warning "On Arch: sudo pacman -S ncurses"
-    exit 1
-fi
-
 # Configure with CMake
 print_status "Configuring with CMake..."
 cmake .. -DCMAKE_BUILD_TYPE=Debug
@@ -83,21 +67,14 @@ make -j"$JOBS"
 # Check if build was successful
 if [ $? -eq 0 ]; then
     print_status "Build successful!"
-    print_status "Binary location: $(pwd)/dropshell"
 else
     print_error "Build failed!"
     exit 1
 fi
 
-print_status "Auto-installing dropshell..."
-sudo make install
-if [ $? -eq 0 ]; then
-    print_status "Installation successful!"
-else
-    print_error "Installation failed!"
-    exit 1
-fi
-
+print_status "Auto-installing dropshell locally..."
+mkdir -p "${HOME}/.local/bin"
+cp "$SCRIPT_DIR/build/dropshell" "${HOME}/.local/bin/dropshell"
 
 # Return to original directory
 cd ..

source/src/commands/install.cpp

@@ -18,6 +18,7 @@
 #include <filesystem>
 #include <libassert/assert.hpp>
 #include "servers.hpp"
+#include <sys/stat.h>
 
 namespace dropshell
 {
@@ -176,49 +177,107 @@ namespace dropshell
         return trim(result);
     }
 
+    int configure_autocomplete()
+    {
+        debug << "Ensuring dropshell autocomplete is registered in ~/.bashrc..." << std::endl;
+
+        std::filesystem::path bashrc = localpath::current_user_home() +"/.bashrc";
+
+        std::string autocomplete_script = R"(
+#---DROPSHELL AUTOCOMPLETE START---
+_dropshell_completions() {
+    local cur
+    COMPREPLY=()
+    cur="${COMP_WORDS[COMP_CWORD]}"
+    
+    # call dropshell to get the list of possiblities for the current argument. Supply all previous arguments.
+    local completions=($(dropshell autocomplete "${COMP_WORDS[@]:1:${COMP_CWORD}-1}"))
+    COMPREPLY=( $(compgen -W "${completions[*]}" -- ${cur}) )
+    return 0
+}
+
+# Register the completion function
+complete -F _dropshell_completions dropshell 
+complete -F _dropshell_completions ds 
+#---DROPSHELL AUTOCOMPLETE END---
+)";
+
+        file_replace_or_add_segment(bashrc.string(), autocomplete_script);
+        return 0;
+    }
+
+    int configure_localbin()
+    {
+        debug << "Ensuring ~/.local/bin is in the ~/.bashrc path..." << std::endl;
+
+        std::filesystem::path bashrc = localpath::current_user_home() +"/.bashrc";
+        std::filesystem::path localbin = localpath::current_user_home() + "/.local/bin";
+        std::filesystem::create_directories(localbin);
+        // check if already in path
+        const char* env_p = std::getenv("PATH");
+        if (env_p) {
+            std::string path_str = env_p;
+            if (path_str.find(localbin.string()) == std::string::npos) {
+                std::string pathstr="#---DROPSHELL PATH START---\nexport PATH=\""+localbin.string()+":$PATH\"\n#---DROPSHELL PATH END---\n";
+                file_replace_or_add_segment(bashrc.string(), pathstr);
+            }
+        }
+        return 0;
+    }
+
     int update_dropshell()
     {
         maketitle("Updating dropshell on this computer...");
 
+        configure_localbin();
+        configure_autocomplete();
+
         // determine path to this executable
-        std::filesystem::path dropshell_path = std::filesystem::canonical("/proc/self/exe");
-        std::filesystem::path parent_path = dropshell_path.parent_path();
+        std::filesystem::path exe_path = std::filesystem::canonical("/proc/self/exe");
+        std::filesystem::path parent_path = exe_path.parent_path();
 
         // determine the architecture of the system
         std::string arch = shared_commands::get_arch();
 
         std::string url = "https://gitea.jde.nz/public/dropshell/releases/download/latest/dropshell." + arch;
 
-        // download new version, preserve permissions and ownership
-        std::string bash_script;
-        bash_script += "docker run --rm -v " + parent_path.string() + ":/target";
-        bash_script += " gitea.jde.nz/public/debian-curl:latest";
-        bash_script += " sh -c \"";
-        bash_script += " curl -fsSL " + url + " -o /target/dropshell_temp &&";
-        bash_script += " chmod --reference=/target/dropshell /target/dropshell_temp &&";
-        bash_script += " chown --reference=/target/dropshell /target/dropshell_temp";
-        bash_script += "\"";
+        // check that the user that owns the exe is the current user this process is running as.
+        struct stat st;
+        if (stat(exe_path.c_str(), &st) != 0) {
+            error << "Failed to stat dropshell executable: " << strerror(errno) << std::endl;
+            return -1;
+        }
 
-        std::string cmd = "bash -c '" + bash_script + "'";
-        int rval = system(cmd.c_str());
-        if (rval != 0)
+        uid_t current_uid = getuid();
+        if (st.st_uid != current_uid) {
+            warning << "Current user does not own the dropshell executable. Please run as the owner to update." << std::endl;
+            return -1;
+        }
+
+        shared_commands::cLocalTempFolder local_temp_folder;
+        std::filesystem::path temp_file = local_temp_folder.path() / "dropshell";
+        bool download_okay = download_file(url, temp_file);
+        if (!download_okay)
         {
             error << "Failed to download new version of dropshell." << std::endl;
             return -1;
         }
 
+        // make executable
+        chmod(temp_file.c_str(), 0755);
+
         // check if the new version is the same as the old version
-        uint64_t new_hash = hash_file(parent_path / "dropshell_temp");
-        uint64_t old_hash = hash_file(parent_path / "dropshell");
+        uint64_t new_hash = hash_file(temp_file);
+        uint64_t old_hash = hash_file(exe_path);
         if (new_hash == old_hash)
         {
             info << "Confirmed dropshell is the latest version." << std::endl;
             return 0;
         }
 
-        std::string runvercmd = (parent_path / "dropshell").string() + " version";
+        std::string runvercmd = exe_path.string() + " version";
         std::string currentver = _exec(runvercmd.c_str());
-        runvercmd = (parent_path / "dropshell_temp").string() + " version";
+        runvercmd = temp_file.string() + " version";
         std::string newver = _exec(runvercmd.c_str());
 
         if (currentver >= newver)
@@ -228,18 +287,12 @@ namespace dropshell
             return 0;
         }
 
-        return 0;
+        // move the new version to the old version.
+        std::filesystem::rename(exe_path, exe_path.parent_path() / "dropshell.old");
+        std::filesystem::rename(temp_file, exe_path);
 
-        std::string bash_script_2 = "docker run --rm -v " + parent_path.string() + ":/target gitea.jde.nz/public/debian-curl:latest " +
-                                    "sh -c \"mv /target/dropshell_temp /target/dropshell\"";
-        rval = system(bash_script_2.c_str());
-        if (rval != 0)
-        {
-            error << "Failed to install new version of dropshell." << std::endl;
-            return -1;
-        }
-
-        info << "Successfully updated " << dropshell_path << " to the latest " << arch << " version." << std::endl;
+        // remove the old version.
+        std::filesystem::remove(exe_path.parent_path() / "dropshell.old");
 
         // execute the new version
         execlp("bash", "bash", "-c", (parent_path / "dropshell").c_str(), "install", (char *)nullptr);
@@ -316,8 +369,6 @@ namespace dropshell
         if (rval != 0)
             return rval;
 
-        return 0;
-
         rval = install_local_agent();
         if (rval != 0)
             return rval;

source/src/commands/shared_commands.cpp

@@ -107,6 +107,22 @@ namespace dropshell
             return mPath;
         }
 
+
+
+        cLocalTempFolder::cLocalTempFolder()
+        {
+            mPath = std::filesystem::temp_directory_path() / random_alphanumeric_string(10);
+            std::filesystem::create_directories(mPath);
+        }
+        cLocalTempFolder::~cLocalTempFolder()
+        {
+            std::filesystem::remove_all(mPath);
+        }
+        std::filesystem::path cLocalTempFolder::path() const
+        {
+            return mPath;
+        }
+
         // ------------------------------------------------------------------------------------------------
         // get_all_services_status : SHARED COMMAND
         // ------------------------------------------------------------------------------------------------

source/src/commands/shared_commands.hpp

@@ -1,6 +1,8 @@
 #ifndef SHARED_COMMANDS_HPP
 #define SHARED_COMMANDS_HPP
 
+#include <filesystem>
+
 #include "servers.hpp"
 #include "command_registry.hpp"
 #include "servers.hpp"
@@ -40,6 +42,16 @@ namespace dropshell
         std::string mUser;
     };
 
+    class cLocalTempFolder
+    {
+    public:
+        cLocalTempFolder(); // create a temp folder on the local machine
+        ~cLocalTempFolder();                                    // delete the temp folder on the local machine
+        std::filesystem::path path() const;                                // get the path to the temp folder on the local machine
+    private:
+        std::filesystem::path mPath;
+    };
+
     bool rsync_tree_to_remote(
         const std::string &local_path,
         const std::string &remote_path,

source/src/utils/utils.cpp

@@ -1,4 +1,8 @@
 #include "utils.hpp"
+#include "httplib.hpp"
+#include "json.hpp"
+
+
 #include <iostream>
 #include <string>
 #include <fstream>
@@ -10,6 +14,7 @@
 #include <sys/ioctl.h>
 #include <unistd.h>
 #include <cctype>
+#include <sstream>
 
 namespace dropshell {
 
@@ -445,4 +450,183 @@ std::string tolower(const std::string& str) {
     return result;
 }
 
+// Common utility function to make HTTP requests
+struct HttpResult {
+    bool success;
+    int status;
+    std::string body;
+    std::string error;
+};
+
+HttpResult make_http_request(const std::string& url) {
+    try {
+        // Parse the URL to get host and path
+        std::string host;
+        std::string path;
+        size_t protocol_end = url.find("://");
+        if (protocol_end != std::string::npos) {
+            size_t host_start = protocol_end + 3;
+            size_t path_start = url.find('/', host_start);
+            if (path_start != std::string::npos) {
+                host = url.substr(host_start, path_start - host_start);
+                path = url.substr(path_start);
+            } else {
+                host = url.substr(host_start);
+                path = "/";
+            }
+        } else {
+            return {false, 0, "", "Invalid URL format"};
+        }
+
+        // Create HTTP client
+        httplib::Client cli(host);
+        cli.set_connection_timeout(10); // 10 second timeout
+
+        // Make GET request
+        auto res = cli.Get(path);
+        if (!res) {
+            return {false, 0, "", "Failed to connect to server"};
+        }
+        if (res->status != 200) {
+            return {false, res->status, "", "HTTP request failed with status " + std::to_string(res->status)};
+        }
+
+        return {true, res->status, res->body, ""};
+    } catch (const std::exception& e) {
+        return {false, 0, "", std::string("Exception: ") + e.what()};
+    }
+}
+
+bool download_file(const std::string &url, const std::string &destination) {
+    auto result = make_http_request(url);
+    if (!result.success) {
+        warning << "Failed to download file from URL: " << url << std::endl;
+        return false;
+    }
+
+    try {
+        std::ofstream out_file(destination, std::ios::binary);
+        if (!out_file) {
+            warning << "Failed to open file for writing: " << destination << std::endl;
+            return false;
+        }
+        out_file.write(result.body.c_str(), result.body.size());
+        out_file.close();
+        return true;
+    } catch (const std::exception& e) {
+        warning << "Failed to download file from URL: " << url << std::endl;
+        warning << "Exception: " << e.what() << std::endl;
+        return false;
+    }
+}
+
+nlohmann::json get_json_from_url(const std::string &url) {
+    auto result = make_http_request(url);
+    if (!result.success) {
+        warning << "Failed to get JSON from URL: " << url << std::endl;
+        return nlohmann::json();
+    }
+
+    try {
+        return nlohmann::json::parse(result.body);
+    } catch (const nlohmann::json::parse_error& e) {
+        warning << "Failed to parse JSON from URL: " << url << std::endl;
+        warning << "JSON: " << result.body << std::endl;
+        return nlohmann::json();
+    }
+}
+
+std::string get_string_from_url(const std::string &url) {
+    auto result = make_http_request(url);
+    if (!result.success) {
+        warning << "Failed to get string from URL: " << url << std::endl;
+        return std::string();
+    }
+    return result.body;
+}
+
+bool match_line(const std::string &line, const std::string &pattern) {
+    return trim(line) == trim(pattern);
+}
+
+// replace or append a block of text to a file, matching first and last lines if replacing.
+// edits file in-place.
+bool file_replace_or_add_segment(std::string filepath, std::string segment)
+{
+    std::string first_line = segment.substr(0, segment.find("\n"));
+
+    // look backwards until we get a non-empty line.
+    size_t last_line_pos = segment.rfind("\n");
+    while (last_line_pos != std::string::npos) {
+        std::string last_line = segment.substr(last_line_pos + 1);
+        if (!trim(last_line).empty()) {
+            break;
+        }
+        last_line_pos = segment.rfind("\n", last_line_pos - 1);
+    }
+    std::string last_line = segment.substr(last_line_pos + 1);
+
+    // Read the entire file into memory
+    std::ifstream input_file(filepath);
+    if (!input_file.is_open()) {
+        std::cerr << "Error: Unable to open file: " << filepath << std::endl;
+        return false;
+    }
+
+    std::vector<std::string> file_lines;
+    std::string line;
+    while (std::getline(input_file, line)) {
+        file_lines.push_back(line);
+    }
+    input_file.close();
+
+    // Try to find the matching block
+    bool found_match = false;
+    for (size_t i = 0; i < file_lines.size(); i++) {
+        if (match_line(file_lines[i], first_line)) {
+            // Found potential start, look for end
+            for (size_t j = i + 1; j < file_lines.size(); j++) {
+                if (match_line(file_lines[j], last_line)) {
+                    // Found matching block, replace it
+                    file_lines.erase(file_lines.begin() + i, file_lines.begin() + j + 1);
+                    
+                    // Split segment into lines and insert them
+                    std::vector<std::string> segment_lines;
+                    std::istringstream segment_stream(segment);
+                    while (std::getline(segment_stream, line)) {
+                        segment_lines.push_back(line);
+                    }
+                    file_lines.insert(file_lines.begin() + i, segment_lines.begin(), segment_lines.end());
+                    
+                    found_match = true;
+                    break;
+                }
+            }
+            if (found_match) break;
+        }
+    }
+
+    // If no match found, append the segment
+    if (!found_match) {
+        std::istringstream segment_stream(segment);
+        while (std::getline(segment_stream, line)) {
+            file_lines.push_back(line);
+        }
+    }
+
+    // Write back to file
+    std::ofstream output_file(filepath);
+    if (!output_file.is_open()) {
+        std::cerr << "Error: Unable to open file for writing: " << filepath << std::endl;
+        return false;
+    }
+
+    for (const auto& line : file_lines) {
+        output_file << line << "\n";
+    }
+    output_file.close();
+
+    return true;
+}
+
 } // namespace dropshell 

source/src/utils/utils.hpp

@@ -5,6 +5,7 @@
 #include <map>
 
 #include "output.hpp"
+#include "json.hpp"
 
 namespace dropshell {
 
@@ -61,4 +62,11 @@ std::string get_line_wrap(std::string & src, int maxchars);
 
 std::string tolower(const std::string& str);
 
+bool download_file(const std::string& url, const std::string& destination);
+nlohmann::json get_json_from_url(const std::string& url);
+std::string get_string_from_url(const std::string& url);
+
+// replace or append a block of text to a file, matching first and last lines if replacing.
+bool file_replace_or_add_segment(std::string filepath, std::string segment);
+
 } // namespace dropshell