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| author | Luke Shumaker <lukeshu@parabola.nu> | 2017-02-15 14:29:19 -0500 |
|---|---|---|
| committer | Luke Shumaker <lukeshu@parabola.nu> | 2017-02-15 14:29:19 -0500 |
| commit | f1ed4b1d81dcaa04bfdf49e36f3b5e3cc5dfa338 (patch) | |
| tree | 3a8d1377c3da73c7842e7ea2e1e484adb892c253 | |
| parent | aa11acaf52dfd101cb6fe6f7137d2cbd5c8e0d9b (diff) | |
lib/common.sh: Make it safe to include multiple times.
This is similar to common C #ifdef guards.
I was tempted to wrap the entire thing in the if/fi (rather than use
'return' to bail early. However, that means it won't execute anything
until after it reaches 'fi'. And if `shopt -s extglob` isn't executed
before parsing, then it will syntax-error on the extended globs. One
solution would have been to move `shopt -s extglob` up above the
include-guard. But the committed solution is all-around simpler.
| -rw-r--r-- | lib/common.sh | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/common.sh b/lib/common.sh index 62f4e72..33f9552 100644 --- a/lib/common.sh +++ b/lib/common.sh @@ -1,5 +1,11 @@ +#!/hint/bash +# This may be included with or without `set -euE` + # License: Unspecified +[[ -z ${_INCLUDE_COMMON_SH:-} ]] || return 0 +_INCLUDE_COMMON_SH=true + # Avoid any encoding problems export LANG=C |