pyenv/libexec/rbenv-version-file-read

#!/usr/bin/env bash
# Usage: rbenv version-file-read <file>
set -e
[ -n "$RBENV_DEBUG" ] && set -x

VERSION_FILE="$1"

if [ -e "$VERSION_FILE" ]; then
  # Read the first non-whitespace word from the specified version file.
  # Be careful not to load it whole in case there's something crazy in it.
  words=( $(head -c 1024 "$VERSION_FILE") )
  version="${words[0]}"

  if [ -n "$version" ]; then
    echo "$version"
    exit
  fi
fi

exit 1
Extract rbenv-version-file{,-read,-write} 2011-08-18 15:11:40 -04:00			`#!/usr/bin/env bash`
Documentation tweaks 2012-12-29 23:05:04 -05:00			`# Usage: rbenv version-file-read <file>`
Extract rbenv-version-file{,-read,-write} 2011-08-18 15:11:40 -04:00			`set -e`
Set RBENV_DEBUG=1 to see what's going on under the hood 2011-09-12 11:11:59 -04:00			`[ -n "$RBENV_DEBUG" ] && set -x`
Extract rbenv-version-file{,-read,-write} 2011-08-18 15:11:40 -04:00
			`VERSION_FILE="$1"`

			`if [ -e "$VERSION_FILE" ]; then`
put up a note why `version-file-read` is tricky 2012-12-12 19:45:06 -05:00			`# Read the first non-whitespace word from the specified version file.`
			`# Be careful not to load it whole in case there's something crazy in it.`
Simplify version-file-read to avoid process substitution Process substitution seems to be causing problems with some versions of bash on specific systems. Fixes #401 2013-10-29 21:33:49 -04:00			`words=( $(head -c 1024 "$VERSION_FILE") )`
			`version="${words[0]}"`
Don't exit out of piped loop Can cause the stdin of cat to close too soon causing: echo: write error: Broken pipe Fixes #97 2011-09-28 13:06:53 -04:00
			`if [ -n "$version" ]; then`
			`echo "$version"`
			`exit`
			`fi`
Extract rbenv-version-file{,-read,-write} 2011-08-18 15:11:40 -04:00			`fi`
`rbenv-version-name` returns `system` for empty version files. Closes #62, #65, #77. 2011-09-09 16:52:31 -04:00
			`exit 1`