cygwin bash: unexpected EOF

Question

What is the problem with the following bash code ?

#!/bin/bash
if [ -z "$1" ]; then
  echo "Usage: $0 {file}"
fi

Generates an error of "Unexpected EOF". Cygwin 2.10.0(0.325/5/3) in Windows 10.

Do you have DOS carriage returns in the file, in particular immediately adjacent to `then`? — tripleee, Jun 11 '18 at 13:56
That was the problem. After 36 years of programming you still learn every day :D — Tickseeker, Jun 12 '18 at 14:10

score 1 · Accepted Answer · answered Jun 11 '18 at 13:53

You have DOS line endings in your file, which means the bash parser sees

if [ -z "$1" ]; then\r
  echo "Usage: $0 {file}"\r
fi\r

Rather than a complete if statement, it sees the beginning of one, one whose condition consists of (so far) the commands [ -z "$1" ], then\r, echo "Usage: $0 {file}"\r, and fi\r. The parser is still looking for the then keyword to terminate the condition list, but finds the end of the file instead.

Save your script as a POSIX text file using \n as the line endings, not \r\n.

cygwin bash: unexpected EOF

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