From 36dabc65160ccc142921cd290b8b91ced88fef42 Mon Sep 17 00:00:00 2001
From: Moridius <moridius-github@posteo.hu>
Date: Sat, 17 Jul 2021 09:42:17 +0200
Subject: [PATCH] Initial commit.

---
 sshconf.py | 130 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100755 sshconf.py

diff --git a/sshconf.py b/sshconf.py
new file mode 100755
index 0000000..b596254
--- /dev/null
+++ b/sshconf.py
@@ -0,0 +1,130 @@
+#!/usr/bin/env python3
+
+import argparse
+import os
+import os.path
+import subprocess
+import sys
+
+
+def read_mdt(mdt_file):
+    table = []
+    try:
+        with open(mdt_file, "r") as f:
+            keys = None
+            for line in f:
+                line = line.strip()
+                if line.startswith("|-"):
+                    continue
+
+                if line.startswith("|"):
+                    line = line[1:]
+
+                if line.endswith("|"):
+                    line = line[:-1]
+
+                if not keys:
+                    keys = [x.strip() for x in line.split("|")]
+                    continue
+
+                row = dict()
+
+                for i, cell in enumerate([x.strip() for x in line.split("|")]):
+                    if cell != "":
+                        row[keys[i]] = cell
+
+                table.append(row)
+    except FileNotFoundError:
+        pass
+
+    return table
+
+
+def run_editor(path):
+    editor = os.environ.get("EDITOR")
+    if not editor:
+        editor = os.environ.get("VISUAL", "vim")
+
+    subprocess.check_call([editor, path])
+
+
+def write_ssh_conf(table):
+    output = ""
+    for host in sorted(table, key=lambda x: x["Host"]):
+        if output != "":
+            output += "\n"
+
+        output += f"Host {host['Host']}\n"
+
+        for key in sorted(host.keys()):
+            if key in ["Host", "Type"]:
+                continue
+
+            output += f"    {key} {host[key]}\n"
+
+    ssh_config_file = os.path.expanduser("~/.ssh/config")
+
+    with open(ssh_config_file, "w") as f:
+        f.write(output)
+
+    os.chmod(ssh_config_file, 0o644)
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description="")
+    group = parser.add_mutually_exclusive_group()
+    group.add_argument("-n", "--non-interactive", action="store_true", help="")
+    group.add_argument("-t", "--edit-types", action="store_true", help="")
+    args = parser.parse_args()
+
+    config_folder = os.path.expanduser("~/.config/sshconf/")
+    os.makedirs(config_folder, exist_ok=True)
+
+    table_file = f"{config_folder}/sshconf.mdt"
+    types_file = f"{config_folder}/types.mdt"
+
+    if not os.path.isfile(types_file):
+        with open(types_file, "w") as f:
+            f.write("| Type | HostName | Port | User | IdentityFile |\n")
+            f.write("|------|----------|------|------|--------------|\n")
+
+    if args.edit_types:
+        try:
+            run_editor(types_file)
+        except subprocess.CalledProcessError:
+            sys.exit(1)
+        sys.exit(0)
+
+    if not args.non_interactive:
+        if not os.path.isfile(table_file):
+            with open(table_file, "w") as f:
+                f.write("| Host | Type | HostName | Port | User | IdentityFile |\n")
+                f.write("|------|------|----------|------|------|--------------|\n")
+
+        try:
+            run_editor(table_file)
+        except subprocess.CalledProcessError:
+            sys.exit(2)
+
+    table = read_mdt(table_file)
+
+    types = dict()
+    for line in read_mdt(types_file):
+        types[line["Type"]] = line
+        del types[line["Type"]]["Type"]
+
+    for host in table:
+        host_type = host.get("Type", None)
+        if host_type and host_type not in types:
+            print(f"Type not found: {host_type}", file=sys.stderr)
+            host_type = None
+
+        if host_type:
+            for key in types[host_type].keys():
+                if key not in host:
+                    host[key] = types[host_type][key].replace("<Host>", host["Host"])
+
+        if "HostName" not in host:
+            host["HostName"] = host["Host"]
+
+    write_ssh_conf(table)