use std::io::Write;
use std::path::Path;
use serde_json::json;
use crate::errors::{AgenticSshError, Result};
use super::{
AgentIntegration, DoctorCounters, HealthcheckContext, InstallContext, backup_and_write_json,
backup_config_file, load_json_file, load_json_file_strict, safe_write_json_file,
};
pub struct GeminiIntegration;
impl AgentIntegration for GeminiIntegration {
fn name(&self) -> &'static str {
"Gemini CLI"
}
fn id(&self) -> &'static str {
"gemini"
}
fn supports_local(&self) -> bool {
true
}
fn install(&self, ctx: &InstallContext) -> Result<()> {
let gemini_dir = ctx.base_dir().join(".gemini");
std::fs::create_dir_all(&gemini_dir).ok();
let settings_path = gemini_dir.join("settings.json");
install_mcp_server(&settings_path, &ctx.agentic_ssh_bin)?;
let gemini_md = gemini_dir.join("GEMINI.md");
install_prompt_rules(&gemini_md)?;
eprintln!();
eprintln!("Setup complete. Next steps:");
eprintln!(" 1. Start a new Gemini CLI session — agentic_ssh tools are now available");
Ok(())
}
fn uninstall(&self, ctx: &InstallContext) -> Result<()> {
let gemini_dir = ctx.base_dir().join(".gemini");
let settings_path = gemini_dir.join("settings.json");
uninstall_mcp_server(&settings_path);
let gemini_md = gemini_dir.join("GEMINI.md");
uninstall_prompt_rules(&gemini_md);
eprintln!();
eprintln!("Uninstall complete. AgenticSsh has been removed from Gemini CLI.");
eprintln!("Start a new Gemini CLI session for changes to take effect.");
Ok(())
}
fn healthcheck(&self, dc: &mut DoctorCounters, ctx: &HealthcheckContext) {
eprintln!("\n\x1b[1mGemini CLI integration\x1b[0m");
doctor_check_settings(dc, &ctx.home);
doctor_check_prompt(dc, &ctx.home);
}
fn is_detected(&self, home: &Path) -> bool {
home.join(".gemini").is_dir()
}
fn primary_config_path(&self, home: &Path) -> Option<std::path::PathBuf> {
Some(home.join(".gemini/settings.json"))
}
fn has_agentic_ssh(&self, home: &Path) -> bool {
let settings = home.join(".gemini").join("settings.json");
if !settings.exists() {
return false;
}
let json = super::load_json_file(&settings);
if let Some(agentic_ssh) = json.get("mcpServers").and_then(|v| v.get("agentic_ssh")) {
if let Some(current_bin) = super::which_agentic_ssh() {
let cmd = agentic_ssh
.get("command")
.and_then(|v| v.as_str())
.unwrap_or("");
cmd == current_bin
} else {
true
}
} else {
false
}
}
}
fn install_mcp_server(settings_path: &Path, agentic_ssh_bin: &str) -> Result<()> {
let backup = backup_config_file(settings_path)?;
let mut settings = match load_json_file_strict(settings_path) {
Ok(v) => v,
Err(e) => {
if let Some(ref b) = backup {
eprintln!(" Backup preserved at: {}", b.display());
}
return Err(e);
}
};
settings["mcpServers"]["agentic_ssh"] = json!({
"command": agentic_ssh_bin,
"args": ["serve"],
"trust": true
});
safe_write_json_file(settings_path, &settings, backup.as_deref())?;
eprintln!(
"\x1b[32m✔\x1b[0m Added agentic_ssh MCP server to {}",
settings_path.display()
);
Ok(())
}
fn install_prompt_rules(gemini_md: &Path) -> Result<()> {
let marker = "## Prefer agentic_ssh MCP tools";
let existing = if gemini_md.exists() {
std::fs::read_to_string(gemini_md).unwrap_or_default()
} else {
String::new()
};
if existing.contains(marker) {
if existing.contains("agentic_ssh_context") || existing.contains("knowledge graph") {
uninstall_prompt_rules(gemini_md);
} else {
eprintln!(" GEMINI.md already contains agentic_ssh rules, skipping");
return Ok(());
}
}
let mut f = std::fs::OpenOptions::new()
.create(true)
.append(true)
.open(gemini_md)
.map_err(|e| AgenticSshError::Config {
message: format!("failed to open GEMINI.md: {e}"),
})?;
write!(
f,
"\n{marker}\n\n\
When you need to discover, query, monitor, or execute commands on remote SSH hosts, \
ALWAYS use the `agentic_ssh` MCP tools:\n\
- **Discovering Hosts:** Use the `list_hosts` tool to retrieve the list of configured remote SSH hosts. Do NOT read or parse `~/.ssh/config` manually.\n\
- **Executing Commands:** Use the `run_command` tool to run shell commands on one or more hosts concurrently.\n\
- **Monitoring Logs:** Use `tail_log` (for files) or `tail_container_logs` (for Docker containers) to read recent logs. To verify startup, services, or events across cluster nodes without polling, use `wait_for_log_pattern` to block and stream logs until a regex pattern is matched.\n\
- **Checking System & Network Status:** Use `get_system_stats` to fetch structured CPU, memory, and disk usage metrics. Use `list_ports` to see active listening TCP/UDP ports. Use `search_processes` to find running processes.\n\
- **Custom Tools:** Use custom commands registered dynamically through the configuration file (e.g., `find_large_files`, `check_service_status`, `check_docker_status`).\n\n\
These tools leverage an automatic connection pool (reusing active sessions and closing them after 5 minutes of inactivity), handle SSH key-based authentication seamlessly, and support output abbreviation to prevent token bloat.\n"
)
.ok();
eprintln!(
"\x1b[32m✔\x1b[0m Appended agentic_ssh rules to {}",
gemini_md.display()
);
Ok(())
}
fn uninstall_mcp_server(settings_path: &Path) {
if !settings_path.exists() {
return;
}
let Ok(contents) = std::fs::read_to_string(settings_path) else {
return;
};
let Ok(mut settings) = serde_json::from_str::<serde_json::Value>(&contents) else {
return;
};
let Some(servers) = settings
.get_mut("mcpServers")
.and_then(|v| v.as_object_mut())
else {
return;
};
if servers.remove("agentic_ssh").is_none() {
eprintln!(
" No agentic_ssh MCP server in {}, skipping",
settings_path.display()
);
return;
}
if servers.is_empty() {
settings.as_object_mut().map(|o| o.remove("mcpServers"));
}
let is_empty = settings.as_object().is_some_and(serde_json::Map::is_empty);
if is_empty {
std::fs::remove_file(settings_path).ok();
eprintln!(
"\x1b[32m✔\x1b[0m Removed {} (was empty)",
settings_path.display()
);
} else if backup_and_write_json(settings_path, &settings) {
eprintln!(
"\x1b[32m✔\x1b[0m Removed agentic_ssh MCP server from {}",
settings_path.display()
);
}
}
fn uninstall_prompt_rules(gemini_md: &Path) {
if !gemini_md.exists() {
return;
}
let Ok(contents) = std::fs::read_to_string(gemini_md) else {
return;
};
if !contents.contains("agentic_ssh") {
eprintln!(" GEMINI.md does not contain agentic_ssh rules, skipping");
return;
}
let marker = "## Prefer agentic_ssh MCP tools";
let Some(start) = contents.find(marker) else {
return;
};
let after_marker = start + marker.len();
let end = contents[after_marker..]
.find("\n## ")
.map_or(contents.len(), |pos| after_marker + pos);
let mut new_contents = String::new();
new_contents.push_str(contents[..start].trim_end());
let remainder = &contents[end..];
if !remainder.is_empty() {
new_contents.push_str("\n\n");
new_contents.push_str(remainder.trim_start());
}
let new_contents = new_contents.trim().to_string();
if new_contents.is_empty() {
std::fs::remove_file(gemini_md).ok();
eprintln!(
"\x1b[32m✔\x1b[0m Removed {} (was empty)",
gemini_md.display()
);
} else {
std::fs::write(gemini_md, format!("{new_contents}\n")).ok();
eprintln!(
"\x1b[32m✔\x1b[0m Removed agentic_ssh rules from {}",
gemini_md.display()
);
}
}
fn doctor_check_settings(dc: &mut DoctorCounters, home: &Path) {
let settings_path = home.join(".gemini").join("settings.json");
if !settings_path.exists() {
dc.warn(&format!(
"{} not found — run `agentic_ssh install --agent gemini` if you use Gemini CLI",
settings_path.display()
));
return;
}
let settings = load_json_file(&settings_path);
let server = settings
.get("mcpServers")
.and_then(|v| v.get("agentic_ssh"));
let Some(server) = server.and_then(|v| v.as_object()) else {
dc.fail(&format!(
"MCP server NOT registered in {} — run `agentic_ssh install --agent gemini`",
settings_path.display()
));
return;
};
dc.pass(&format!(
"MCP server registered in {}",
settings_path.display()
));
let has_serve = server
.get("args")
.and_then(|v| v.as_array())
.is_some_and(|arr| arr.iter().any(|v| v.as_str() == Some("serve")));
if has_serve {
dc.pass("MCP server args include \"serve\"");
} else {
dc.fail("MCP server args missing \"serve\" — run `agentic_ssh install --agent gemini`");
}
let is_trusted = server
.get("trust")
.and_then(serde_json::Value::as_bool)
.unwrap_or(false);
if is_trusted {
dc.pass("MCP server has trust: true (tools auto-approved)");
} else {
dc.warn("MCP server missing trust: true — Gemini will prompt for each tool call");
}
}
fn doctor_check_prompt(dc: &mut DoctorCounters, home: &Path) {
let gemini_md = home.join(".gemini").join("GEMINI.md");
if gemini_md.exists() {
let has_rules = std::fs::read_to_string(&gemini_md)
.unwrap_or_default()
.contains("agentic_ssh");
if has_rules {
dc.pass("GEMINI.md contains agentic_ssh rules");
} else {
dc.fail(
"GEMINI.md missing agentic_ssh rules — run `agentic_ssh install --agent gemini`",
);
}
} else {
dc.warn("~/.gemini/GEMINI.md does not exist");
}
}