ID

4de7868

date

2023-07-17 01:24:26+00:00

author

Alex Chan <alex@alexwlchan.net>

parent

37e95be

message

add a `body` command

changed files

2 files, 46 additions

• text/README.md
• text/body

Changed files

text/README.md (2301) → text/README.md (2596)

diff --git a/text/README.md b/text/README.md
index 376ee87..bc76a92 100644
--- a/text/README.md
+++ b/text/README.md
@@ -6,6 +6,17 @@ These are utilities for manipulating streams of text; I consider them in a simil
 
 <dl>
   <dt>
+    <a href="https://github.com/alexwlchan/scripts/blob/main/text/body">
+      <code>body -n [LINENO] [PATH]</code>
+    </a>
+  </dt>
+  <dd>
+    print the nth line of a file.
+    This is meant to fill a gap between the Unix utilities <code>head</code> and <code>tail</code>.
+  </dd>
+  
+  
+  <dt>
     <a href="https://github.com/alexwlchan/scripts/blob/main/text/midline">
       <code>midline [PATH]</code>
     </a>

text/body (0) → text/body (832)

diff --git a/text/body b/text/body
new file mode 100755
index 0000000..f5d46f2
--- /dev/null
+++ b/text/body
@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+"""
+Prints the nth line of a file.
+
+This is meant to fill a gap between the Unix utilities ``head`` and
+``tail``, which I normally use in one of the following forms:
+
+    $ head -n 5 myfile.txt
+    $ tail -n 5 myfile.txt
+
+which print the first/last 5 lines of a file, respectively.
+
+This command fills the gap -- it gets the nth line of a file, e.g. this
+prints the 100th line of the file:
+
+    $ body -n 100 myfile.txt
+
+"""
+
+import argparse
+import subprocess
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+
+    parser.add_argument("-n", required=True, dest="lineno", type=int)
+    parser.add_argument("PATH")
+
+    args = parser.parse_args()
+
+    for lineno, line in enumerate(open(args.PATH), start=1):
+        if lineno == args.lineno:
+            print(line, end="")
+            break