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import { readableStreamToText, spawn } from "bun";
import { afterEach, expect, it } from "bun:test";
import { readFile, unlink } from "fs/promises";
export const runContainer = async (
image: string,
init = "sleep infinity",
): Promise<string> => {
const proc = spawn([
"docker",
"run",
"--rm",
"-d",
"--label",
"modules-test=true",
"--network",
"host",
"--entrypoint",
"sh",
image,
"-c",
init,
]);
let containerID = await readableStreamToText(proc.stdout);
const exitCode = await proc.exited;
if (exitCode !== 0) {
throw new Error(containerID);
}
return containerID.trim();
};
// executeScriptInContainer finds the only "coder_script"
// resource in the given state and runs it in a container.
export const executeScriptInContainer = async (
state: TerraformState,
image: string,
shell: string = "sh",
): Promise<{
exitCode: number;
stdout: string[];
stderr: string[];
}> => {
const instance = findResourceInstance(state, "coder_script");
const id = await runContainer(image);
const resp = await execContainer(id, [shell, "-c", instance.script]);
const stdout = resp.stdout.trim().split("\n");
const stderr = resp.stderr.trim().split("\n");
return {
exitCode: resp.exitCode,
stdout,
stderr,
};
};
export const execContainer = async (
id: string,
cmd: string[],
): Promise<{
exitCode: number;
stderr: string;
stdout: string;
}> => {
const proc = spawn(["docker", "exec", id, ...cmd], {
stderr: "pipe",
stdout: "pipe",
});
const [stderr, stdout] = await Promise.all([
readableStreamToText(proc.stderr),
readableStreamToText(proc.stdout),
]);
const exitCode = await proc.exited;
return {
exitCode,
stderr,
stdout,
};
};
export interface TerraformState {
outputs: {
[key: string]: {
type: string;
value: any;
};
}
resources: [
{
type: string;
name: string;
provider: string;
instances: [
{
attributes: {
[key: string]: any;
};
},
];
},
];
}
export interface CoderScriptAttributes {
script: string;
agent_id: string;
url: string;
}
// findResourceInstance finds the first instance of the given resource
// type in the given state. If name is specified, it will only find
// the instance with the given name.
export const findResourceInstance = <T extends "coder_script" | string>(
state: TerraformState,
type: T,
name?: string,
// if type is "coder_script" return CoderScriptAttributes
): T extends "coder_script"
? CoderScriptAttributes
: Record<string, string> => {
const resource = state.resources.find(
(resource) =>
resource.type === type && (name ? resource.name === name : true),
);
if (!resource) {
throw new Error(`Resource ${type} not found`);
}
if (resource.instances.length !== 1) {
throw new Error(
`Resource ${type} has ${resource.instances.length} instances`,
);
}
return resource.instances[0].attributes as any;
};
// testRequiredVariables creates a test-case
// for each variable provided and ensures that
// the apply fails without it.
export const testRequiredVariables = (
dir: string,
vars: Record<string, string>,
) => {
// Ensures that all required variables are provided.
it("required variables", async () => {
await runTerraformApply(dir, vars);
});
const varNames = Object.keys(vars);
varNames.forEach((varName) => {
// Ensures that every variable provided is required!
it("missing variable " + varName, async () => {
const localVars = {};
varNames.forEach((otherVarName) => {
if (otherVarName !== varName) {
localVars[otherVarName] = vars[otherVarName];
}
});
try {
await runTerraformApply(dir, localVars);
} catch (ex) {
expect(ex.message).toContain(
`input variable \"${varName}\" is not set`,
);
return;
}
throw new Error(`${varName} is not a required variable!`);
});
});
};
// runTerraformApply runs terraform apply in the given directory
// with the given variables. It is fine to run in parallel with
// other instances of this function, as it uses a random state file.
export const runTerraformApply = async (
dir: string,
vars: Record<string, string>,
): Promise<TerraformState> => {
const stateFile = `${dir}/${crypto.randomUUID()}.tfstate`;
const env = {};
Object.keys(vars).forEach((key) => (env[`TF_VAR_${key}`] = vars[key]));
const proc = spawn(
[
"terraform",
"apply",
"-compact-warnings",
"-input=false",
"-auto-approve",
"-state",
"-no-color",
stateFile,
],
{
cwd: dir,
env,
stderr: "pipe",
stdout: "pipe",
},
);
const text = await readableStreamToText(proc.stderr);
const exitCode = await proc.exited;
if (exitCode !== 0) {
throw new Error(text);
}
const content = await readFile(stateFile, "utf8");
await unlink(stateFile);
return JSON.parse(content);
};
// runTerraformInit runs terraform init in the given directory.
export const runTerraformInit = async (dir: string) => {
const proc = spawn(["terraform", "init"], {
cwd: dir,
});
const text = await readableStreamToText(proc.stdout);
const exitCode = await proc.exited;
if (exitCode !== 0) {
throw new Error(text);
}
};
export const createJSONResponse = (obj: object, statusCode = 200): Response => {
return new Response(JSON.stringify(obj), {
headers: {
"Content-Type": "application/json",
},
status: statusCode,
})
}