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| author | Luke Shumaker <lukeshu@parabola.nu> | 2017-02-15 14:29:19 -0500 |
|---|---|---|
| committer | Luke Shumaker <lukeshu@parabola.nu> | 2017-04-05 14:09:14 -0400 |
| commit | eff2e50803c35a1cbbce572036c271df8c352d87 (patch) | |
| tree | 353b99a03dc588b1d0a457d1b3c69b38a5af03ee | |
| parent | 55d5e061cb3d955faaf6ed291eb7294b84706a83 (diff) | |
lib/common.sh: Make it safe to include multiple times.lukeshu/to-upstream/cleanup-20170402-rebase
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 | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/common.sh b/lib/common.sh index 4536668..c9afc36 100644 --- a/lib/common.sh +++ b/lib/common.sh @@ -3,6 +3,9 @@ # License: Unspecified +[[ -z ${_INCLUDE_COMMON_SH:-} ]] || return 0 +_INCLUDE_COMMON_SH=true + # Avoid any encoding problems export LANG=C |