IHEB HAMDI | oct2025-2 | Module-Tools | implemenet-shell-tools

implement-shell-tools/cat/cat.js

@@ -0,0 +1,35 @@
+import { program } from 'commander'
+import process from 'process'
+import fs from 'fs'
+
+// const argv = process.argv[4]
+// const data = fs.readFileSync(`sample-files/${argv}`, 'utf-8')
+
+program
+  .command('cat <file>')
+  .description('Output file content')
+  .option('-a, --all', 'Output all content')
+  .option('-n, --line', 'Output each line with number')
+  .option('-b, --nonempty', 'Output total lines not empty')
+  .action((file, options) => {
+    const data = fs.readFileSync(`sample-files/${file}`, 'utf-8').split('\n')
+    if (options.all) {
+      console.log(data.join())
+    }
+    if (options.line) {
+      for (let i = 0; i < data.length; i++) {
+        console.log(`${i} - ${data[i]}`)
+      }
+    }
+    if (options.nonempty) {
+      let totalline = 0
+      data.forEach((line) => {
+        if (line.length != 0) {
+          totalline++
+        }
+      })
+      console.log(totalline)
+    }
+  })
+
+program.parse()

implement-shell-tools/cat/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "cat",
+  "version": "1.0.0",
+  "description": "You should already be familiar with the `cat` command line tool.",
+  "main": "cat.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "module",
+  "dependencies": {
+    "commander": "^14.0.3"
+  }
+}

implement-shell-tools/ls/ls.js

@@ -0,0 +1,22 @@
+import { program } from 'commander'
+import process from 'process'
+import fs from 'fs'
+program
+  .command('ls')
+  .description('Output available files on directory')
+  .option('-a, --all', 'Output all files')
+  .option('-1, --line', 'List one file per line')
+  .action((options) => {
+    const contents = fs.readdirSync(process.cwd(), { withFileTypes: true })
+
+    if (options.all) {
+      contents.forEach((content) => {
+        console.log(content.name)
+      })
+    }
+    if (options.line) {
+      console.log(contents[0].name)
+    }
+  })
+
+program.parse()

implement-shell-tools/ls/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "ls",
+  "version": "1.0.0",
+  "description": "You should already be familiar with the `ls` command line tool.",
+  "main": "ls.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "module",
+  "dependencies": {
+    "commander": "^14.0.3"
+  }
+}

implement-shell-tools/wc/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "wc",
+  "version": "1.0.0",
+  "description": "You should already be familiar with the `wc` command line tool.",
+  "main": "wc.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "module",
+  "dependencies": {
+    "buffer": "^6.0.3",
+    "commander": "^14.0.3"
+  }
+}

implement-shell-tools/wc/wc.js

@@ -0,0 +1,28 @@
+import { program } from 'commander'
+import fs from 'fs'
+import { Buffer } from 'buffer'
+import process from 'process'
+program
+  .command('wc <file>')
+  .description('File word counts')
+  .option('-l, --line', 'print the newline counts')
+  .option('-w, --count', 'print the word counts')
+  .option('-c, --bytes', 'print the bytes counts')
+  .action((file, options) => {
+    const content = fs.readFileSync(`sample-files/${file}`, 'utf-8')
+    if (options.line) {
+      console.log(content.split('\n').length)
+    }
+    if (options.bytes) {
+      console.log(Buffer.from(content).toString('hex'))
+    }
+    if (options.count) {
+      console.log(content.split(' ').length)
+    }
+    if (options.line && file == '*') {
+      const files = fs.readdirSync('sample-files/', { withFileTypes: true })
+      console.log(files)
+    }
+  })
+
+program.parse()

individual-shell-tools/awk/script-01.sh

@@ -2,5 +2,6 @@
 
 set -euo pipefail
 
+awk '{print $1}' scores-table.txt
 # TODO: Write a command to output just the names of each player in `scores-table.txt`.
 # Your output should contain 6 lines, each with just one word on it.

individual-shell-tools/awk/script-02.sh

@@ -2,5 +2,6 @@
 
 set -euo pipefail
 
+awk '{print $1,$2}' scores-table.txt
 # TODO: Write a command to output the names of each player, as well as their city.
 # Your output should contain 6 lines, each with two words on it, separated by a space.

individual-shell-tools/awk/script-03.sh

@@ -2,6 +2,7 @@
 
 set -euo pipefail
 
+awk '{print $1,$3}' scores-table.txt
 # TODO: Write a command to output just the names of each player along with the score from their first attempt.
 # Your output should contain 6 lines, each with one word and one number on it.
 # The first line should be "Ahmed 1".

individual-shell-tools/awk/script-04.sh

@@ -2,6 +2,7 @@
 
 set -euo pipefail
 
+awk '$2 == "London"{print $1,$5}' scores-table.txt
 # TODO: Write a command to output just the names of each player in London along with the score from their last attempt.
 # Your output should contain 3 lines, each with one word and one number on it.
 # The first line should be "Ahmed 4".

individual-shell-tools/awk/script-05.sh

@@ -2,6 +2,8 @@
 
 set -euo pipefail
 
+awk '($3 > 0) {attempt++} ($4 > 0) {attempt++} ($5 > 0) {attempt++} ($6 > 0) {attempt++} ($7 > 0) {attempt++} {print $1,attempt} attempt=0' scores-table.txt
+
 # TODO: Write a command to output just the names of each player along with the number of times they've played the game.
 # Your output should contain 6 lines, each with one word and one number on it.
 # The first line should be "Ahmed 3".

individual-shell-tools/awk/script-06-stretch.sh

@@ -3,6 +3,6 @@
 set -euo pipefail
 
 # NOTE: This is a stretch exercise - it is optional.
-
+awk '{total += $3} END {print total}' scores-table.txt
 # TODO: Write a command to output the total of adding together all players' first scores.
 # Your output should be exactly the number 54.

individual-shell-tools/cat/script-01.sh

@@ -3,4 +3,5 @@
 set -euo pipefail
 
 # TODO: Write a command to output the contents of the helper-1.txt file inside the helper-files directory to the terminal.
+cat ../helper-files/helper-1.txt
 # The output of this command should be "Once upon a time...".

individual-shell-tools/cat/script-02.sh

@@ -11,3 +11,4 @@ set -euo pipefail
 # It looked delicious.
 # I was tempted to take a bite of it.
 # But this seemed like a bad idea...
+cat "../helper-files/helper-1.txt" "../helper-files/helper-2.txt" "../helper-files/helper-3.txt"

individual-shell-tools/cat/script-03.sh

@@ -9,3 +9,4 @@ set -euo pipefail
 # 1 It looked delicious.
 # 2 I was tempted to take a bite of it.
 # 3 But this seemed like a bad idea...
+cat -n ../helper-files/helper-3.txt

individual-shell-tools/grep/script-01.sh

@@ -2,5 +2,6 @@
 
 set -euo pipefail
 
+grep "" dialogue.txt
 # TODO: Write a command to output every line in dialogue.txt said by the Doctor.
 # The output should contain 6 lines.

individual-shell-tools/grep/script-02.sh

@@ -2,5 +2,6 @@
 
 set -euo pipefail
 
+grep -F "Doctor" dialogue.txt
 # TODO: Write a command to output every line in dialogue.txt that contains the word Doctor (regardless of case).
 # The output should contain 9 lines.

individual-shell-tools/grep/script-03.sh

@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the number of lines in dialogue.txt that contain the word Doctor (regardless of case).
 # The output should be exactly the number 9.
+grep -ci "Doctor" dialogue.txt 

individual-shell-tools/grep/script-04.sh

@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt that does not contain the word "Hello" (regardless of case).
 # The output should contain 10 lines.
+grep -vi "Hello" dialogue.txt

individual-shell-tools/grep/script-05.sh

@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt that contains the string "cure", as well as the line before that line.
 # The output should contain two pairs of two lines of text (with a separator between them).
+grep -B 1 "cure" dialogue.txt

individual-shell-tools/ls/script-01.sh

@@ -12,4 +12,5 @@ if [[ "${script_dir}" != "$(pwd)" ]]; then
 fi
 
 # TODO: Write a command to list the files and folders in this directory.
+ls
 # The output should be a list of names including child-directory, script-01.sh, script-02.sh, and more.

individual-shell-tools/ls/script-02.sh

@@ -3,4 +3,5 @@
 set -euo pipefail
 
 # TODO: Write a command which lists all of the files in the directory named child-directory.
+ls child-directory/
 # The output should be a list of names: helper-1.txt, helper-2.txt, helper-3.txt.

individual-shell-tools/ls/script-03.sh

@@ -4,4 +4,5 @@ set -euo pipefail
 
 # TODO: Write a command which _recursively_ lists all of the files and folders in this directory _and_ all of the files inside those folders.
 # The output should be a list of names including: child-directory, script-01.sh, helper-1.txt (and more).
+ls -R
 # The formatting of the output doesn't matter.