add check option to confirm the file is clean

README.md

@@ -13,6 +13,9 @@ colc [column] [file.csv|tsv|txt]
 ## Option
 
 ```
+# check the column is valid
+-c,--check
+
 # show frequency table and histogram
 -b,--binsize <number>
 
@@ -45,7 +48,7 @@ you can download a binary release
 ```sh
 # Install with wget or curl
 ## set the latest version on releases.
-VERSION=v1.0.11
+VERSION=v1.0.12
 ## case you use wget
 wget https://github.com/solaoi/colc/releases/download/$VERSION/colc_linux_amd64.tar.gz
 ## case you use curl
@@ -76,22 +79,30 @@ colc 2 some.csv
 
 <img width="381" alt="スクリーンショット 2022-03-26 23 53 17" src="https://user-images.githubusercontent.com/46414076/160244923-bedc63d3-a516-473f-9cb8-c8c926884c10.png">
 
-Of course Binsize option works well:)
+Of course `-b,--binsize` works well:)
 
 ```
 colc 2 some.csv -b 10
 ```
 
 <img width="742" alt="スクリーンショット 2022-03-26 23 54 04" src="https://user-images.githubusercontent.com/46414076/160244950-d543ed29-4709-465d-8b7d-63be530cc29a.png">
 
-There are noises, then filter necessaries(>=1%)
+There are noises, then filter necessaries(>=1%) with `-f,--filter`
 
 ```
 colc 2 some.csv -b 10 -f 1
 ```
 
 <img width="742" alt="スクリーンショット 2022-03-26 23 54 44" src="https://user-images.githubusercontent.com/46414076/160244980-3e938d6a-766b-4f63-865c-8e5caef18739.png">
 
+If you wanna check whether the file is valid in advance,
+
+`-c,--check` answers the file is dirty or clean.
+
+```
+colc 2 some.csv -c
+```
+
 ## Development
 
 ```

colc.ts

@@ -7,7 +7,7 @@ import {
 import { runner } from "./lib/common.ts";
 import { parse } from "https://deno.land/[email protected]/flags/mod.ts";
 
-const { _, binsize, b, filter, f } = parse(Deno.args);
+const { _, binsize, b, filter, f, check, c } = parse(Deno.args);
 const [column, filename] = _;
 if (typeof column !== "number" || typeof filename !== "string") {
   console.log("Usage:\n  colc [column] [file.csv|tsv|txt]");
@@ -23,13 +23,46 @@ const filterRank: number = (() => {
   if (typeof f === "number" && f > 0) return f;
   return 0;
 })();
+const hasCheck: boolean = (() => {
+  if (typeof check === "boolean") return check;
+  if (typeof c === "boolean") return c;
+  return false;
+})();
 
 const isCsv = filename.endsWith(".csv");
 const headerName = await runner.run(
   `head -n 1 ${filename}| cut -f${column} ${isCsv ? "-d, " : ""}| tr -d 0-9.-`,
 );
 const hasHeader = headerName !== "";
 
+if (hasCheck) {
+  const checkCommand = (() => {
+    const bash = [];
+    if (hasHeader) {
+      bash.push(
+        `tail -n +2 ${filename} | cut -f${column} ${isCsv ? "-d, " : ""}`,
+      );
+    } else {
+      bash.push(
+        `cut -f${column} ${isCsv ? "-d, " : ""}${filename} `,
+      );
+    }
+    bash.push(
+      "| awk '{clean=($1 ~/^[0-9.-]+$/);if(!clean)exit}END{print clean}'",
+    );
+    return bash.join(" ");
+  })();
+  const result = await runner
+    .run(checkCommand);
+  const hasError = result === "0";
+  if (hasError) {
+    console.log("dirty:<");
+    Deno.exit(1);
+  }
+  console.log("clean:D");
+  Deno.exit(0);
+}
+
 if (binSize === null) {
   const statsCommand = (() => {
     const bash = [];