TERMINAL: Add grep command (#1381)

src/Terminal/HelpText.ts

@@ -15,6 +15,8 @@ export const TerminalHelpText: string[] = [
   "    download [script/text file]      Downloads scripts or text files to your computer",
   "    expr [math expression]           Evaluate a mathematical expression",
   "    free                             Check the machine's memory (RAM) usage",
+  "    grep [opts]... pattern [file]... Search for PATTERN (string/regular expression) in each FILE and print results to terminal",
+  "         [-O] [target file]",
   "    grow                             Spoof money in a servers bank account, increasing the amount available.",
   "    hack                             Hack the current machine",
   "    help [command]                   Display this help text, or the help text for a command",
@@ -229,6 +231,47 @@ export const HelpTexts: Record<string, string[]> = {
     "how much of it is being used.",
     " ",
   ],
+  grep: [
+    "Usage: grep [OPTION]... PATTERN [FILE]... [-O] [OUTFILE] [-B/A/C] [NUM]",
+    " ",
+    "Search for PATTERN in each FILE and print results to terminal.",
+    "Example: grep -n -h 'hello world' file1.js file2.txt -O output.txt -C 10 -V",
+    " ",
+    "OPTIONS: ",
+    "  --help                   output this usage message and exit",
+    " ",
+    "Search control:",
+    "  -* --search-all          search for PATTERN in each FILE on server. Ignores any FILE argument(s) passed",
+    "  -p --pipe-terminal       search for PATTERN in terminal output. Ignores any FILE argument(s) passed",
+    " ",
+    "Pattern selection and interpretation:",
+    "  -R, --regexp       PATTERN is basic regular expression. PATTERN is a string by default",
+    " ",
+    "Output control:",
+    "  -m --max-count NUM       stop after NUM selected lines",
+    "  -H --with-filename       print filename with output lines. Default when multiple FILE arguments passed",
+    "  -h --no-filename         suppress printing file name with output lines. Default when one FILE argument passed. Overrides -H",
+    "  -n --line-number         print line number with output lines",
+    "  -q --quiet --silent      suppress printing to terminal",
+    "  -O --output OUTFILE      pipe output to text file. The following argument must be a valid .txt or .json filename. Does NOT overwrite by default",
+    "  -f --allow-overwrite     combine with [-O/--output] to allow overwriting provided output file",
+    " ",
+    "Context control:",
+    "  -B --before-context NUM  print NUM lines of leading context",
+    "  -A --after-context NUM   print NUM lines of trailing context",
+    "  -C --context NUM         print NUM lines of output context",
+    " ",
+    "Miscellaneous:",
+    "  -V --verbose             print PATTERN, count of matches and FILE(s) searched after regular output",
+    "  -v --invert-match        select non-matching lines",
+    " ",
+    "Regular OPTIONs may be combined into one. Context, max-count and output OPTIONs must be separated. Example: grep test -VnH* -O output.txt -C 5",
+    "By default PATTERN is interpreted as a simple string.",
+    "At least one FILE argument must be passed, or pass -*/--search-all to search all files.",
+    "The argument immediately following -m, -O and -B/A/C will be interpreted as the parameter for that OPTION.",
+    'If encountering difficulties with argument parsing, consider explicitly passing a string as PATTERN. Example: grep -G "(complex|regexp|\\w+)" script.js',
+    " ",
+  ],
   grow: [
     "Usage: grow",
     " ",