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Protection against ever-more-talented fools...

PATCH Peter Seebach 2 participants 3 messages May 9, 2012

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#0 lore raw

Time for some shell trivia!

Trivia point:  PATH=:/usr/bin and PATH=.:/usr/bin are equivalent.
Trivia point:  So are PATH=/bin::/usr/bin and PATH=/bin:.:/usr/bin
Trivia point:  People love to write stuff like:

PATH=$(THAT_DIRECTORY):$PATH
Trivia point: The shell expands undefined variables to empty strings.

Which is to say:

meta/classes/sanity.bbclass +3 -2
index 687ddeb..1384592 100644
@@ -298,8 +298,9 @@ def check_sanity(e):
         if not check_app_exists("qemu-arm", e.data):
             messages = messages + "qemu-native was in ASSUME_PROVIDED but the QEMU binaries (qemu-arm) can't be found in PATH"
 
-    if "." in data.getVar('PATH', e.data, True).split(":"):
-        messages = messages + "PATH contains '.' which will break the build, please remove this"
+    paths = data.getVar('PATH', e.data, True).split(":")
+    if "." in paths or "" in paths:
+        messages = messages + "PATH contains '.' or '', which will break the build, please remove this."
 
     if data.getVar('TARGET_ARCH', e.data, True) == "arm":
         # This path is no longer user-readable in modern (very recent) Linux
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Listen, get this.  Nobody with a good compiler needs to be justified.
#1 lore raw
Quoted 9 lines · Peter Seebach

Time for some shell trivia!

Trivia point:  PATH=:/usr/bin and PATH=.:/usr/bin are equivalent.
Trivia point:  So are PATH=/bin::/usr/bin and PATH=/bin:.:/usr/bin
Trivia point:  People love to write stuff like:

PATH=$(THAT_DIRECTORY):$PATH
Trivia point: The shell expands undefined variables to empty strings.

Which is to say:

I like the patch and I can live with the commit message but could we have the right subject line and a signed-off-by please? :)

Cheers,

Richard

#2 lore raw
Quoted 2 lines · On Wed, 9 May 2012 20:49:23 +0100 Richard Purdie…

I like the patch and I can live with the commit message but could we have the right subject line and a signed-off-by please? :)

Heh. I hadn't actually intended this as a pull request, just commentary, but I can do a proper pull request with a meaningful subject, commit message, etc.

-s

Signature · 1 line
Listen, get this.  Nobody with a good compiler needs to be justified.