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* PlatformIOCommand
* Setup and uninstall PlatformIO integration
*/
import { resolve } from "node:path";
import { existsSync, readFileSync, writeFileSync, unlinkSync } from "node:fs";
/**
* Resolved paths for PlatformIO project.
*/
interface IPioProjectPaths {
pioIniPath: string;
scriptPath: string;
}
/**
* Get PlatformIO project paths and validate that platformio.ini exists.
* Exits with error if not in a PlatformIO project directory.
*/
function getPioProjectPaths(): IPioProjectPaths {
const pioIniPath = resolve(process.cwd(), "platformio.ini");
const scriptPath = resolve(process.cwd(), "cnext_build.py");
if (!existsSync(pioIniPath)) {
console.error("Error: platformio.ini not found in current directory");
console.error("Run this command from your PlatformIO project root");
process.exit(1);
}
return { pioIniPath, scriptPath };
}
/**
* PlatformIO integration commands
*/
class PlatformIOCommand {
/**
* Setup PlatformIO integration
* Creates cnext_build.py and modifies platformio.ini
*/
static install(): void {
const { pioIniPath, scriptPath } = getPioProjectPaths();
// Create cnext_build.py script
const buildScript = `Import("env")
import subprocess
from pathlib import Path
def transpile_cnext(source, target, env):
"""Transpile all .cnx files before build"""
# Find all .cnx files in src directory
src_dir = Path("src")
if not src_dir.exists():
return
cnx_files = list(src_dir.rglob("*.cnx"))
if not cnx_files:
return
print(f"Transpiling {len(cnx_files)} c-next files...")
for cnx_file in cnx_files:
try:
result = subprocess.run(
["cnext", str(cnx_file)],
check=True,
capture_output=True,
text=True
)
print(f" ✓ {cnx_file.name}")
except subprocess.CalledProcessError as e:
print(f" ✗ Error: {cnx_file.name}")
print(e.stderr)
env.Exit(1)
env.AddPreAction("buildprog", transpile_cnext)
`;
writeFileSync(scriptPath, buildScript, "utf-8");
console.log(`✓ Created: ${scriptPath}`);
// Read platformio.ini
let pioIni = readFileSync(pioIniPath, "utf-8");
// Check if extra_scripts is already present
if (pioIni.includes("cnext_build.py")) {
console.log("✓ PlatformIO already configured for c-next");
return;
}
// Add extra_scripts line to [env:*] section or create it
if (pioIni.includes("extra_scripts")) {
// Append to existing extra_scripts
pioIni = pioIni.replace(
/extra_scripts\s*=\s*(.+)/,
"extra_scripts = $1\n pre:cnext_build.py",
);
} else {
// Add new extra_scripts line after first [env:*] section
pioIni = pioIni.replace(
/(\[env:[^\]]+\])/,
"$1\nextra_scripts = pre:cnext_build.py",
);
}
writeFileSync(pioIniPath, pioIni, "utf-8");
console.log(`✓ Modified: ${pioIniPath}`);
console.log("");
console.log("✓ PlatformIO integration configured!");
console.log("");
console.log("Next steps:");
console.log(
" 1. Create .cnx files in src/ (alongside your .c/.cpp files)",
);
console.log(" 2. Run: pio run");
console.log("");
console.log(
"The transpiler will automatically convert .cnx → .c before each build.",
);
console.log("Commit both .cnx and generated .c files to version control.");
}
/**
* Remove PlatformIO integration
* Deletes cnext_build.py and removes extra_scripts from platformio.ini
*/
static uninstall(): void {
const { pioIniPath, scriptPath } = getPioProjectPaths();
let hasChanges = false;
// Remove cnext_build.py if it exists
if (existsSync(scriptPath)) {
try {
unlinkSync(scriptPath);
console.log(`✓ Removed: ${scriptPath}`);
hasChanges = true;
} catch (err) {
console.error(`Error removing ${scriptPath}:`, err);
process.exit(1);
}
} else {
console.log("✓ cnext_build.py not found (already removed)");
}
// Read platformio.ini
let pioIni = readFileSync(pioIniPath, "utf-8");
// Check if extra_scripts includes cnext_build.py
if (pioIni.includes("cnext_build.py")) {
// Remove the cnext_build.py reference
// Handle both standalone and appended cases
pioIni = pioIni
// Remove standalone "extra_scripts = pre:cnext_build.py" line (with newline)
.replace(/^extra_scripts[ \t]*=[ \t]*pre:cnext_build\.py[ \t]*\n/m, "")
// Remove from multi-line extra_scripts (e.g., " pre:cnext_build.py")
// Use explicit whitespace chars to avoid backtracking with \s+
.replaceAll(/[\n\t ]+pre:cnext_build\.py/g, "")
// Clean up multiple consecutive blank lines
.replaceAll(/\n\n\n+/g, "\n\n");
writeFileSync(pioIniPath, pioIni, "utf-8");
console.log(`✓ Modified: ${pioIniPath}`);
hasChanges = true;
} else {
console.log(
"✓ platformio.ini already clean (no c-next integration found)",
);
}
if (hasChanges) {
console.log("");
console.log("✓ PlatformIO integration removed!");
console.log("");
console.log("Your .cnx files remain untouched.");
console.log("To re-enable integration: cnext --pio-install");
} else {
console.log("");
console.log("No c-next integration found - nothing to remove.");
}
}
}
export default PlatformIOCommand;
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