--- Begin Message ---
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Subject: |
[PATCH] doc: Document 'shebang' for 'guix shell'. |
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Date: |
Fri, 27 Jan 2023 12:12:37 +0100 |
* doc/guix.texi (Invoking guix shell): Add a note mentioning how to use
'shebang'.
---
doc/guix.texi | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/doc/guix.texi b/doc/guix.texi
index 2b1ad77ba5..acda01c8e6 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -71,7 +71,7 @@ Copyright @copyright{} 2019 Kyle Andrews@*
Copyright @copyright{} 2019 Alex Griffin@*
Copyright @copyright{} 2019, 2020, 2021, 2022 Guillaume Le Vaillant@*
Copyright @copyright{} 2020 Liliana Marie Prikler@*
-Copyright @copyright{} 2019, 2020, 2021, 2022 Simon Tournier@*
+Copyright @copyright{} 2019, 2020, 2021, 2022, 2023 Simon Tournier@*
Copyright @copyright{} 2020 Wiktor Żelazny@*
Copyright @copyright{} 2020 Damien Cassou@*
Copyright @copyright{} 2020 Jakub Kądziołka@*
@@ -5923,6 +5923,19 @@ building or downloading any missing package, and runs the
guix shell python python-numpy -- python3
@end example
+@quotation Note
+@cindex shebang
+@command{guix shell} can be used as @emph{shebang}. Consider the
+previous example as an executable Python script, the @emph{shebang}
+reads,
+
+@example
+#!/usr/bin/env -S guix shell python python-nympy -- python3
+@end example
+
+All the @var{options} or convenience of @command{guix shell} apply.
+@end quotation
+
Development environments can be created as in the example below, which
spawns an interactive shell containing all the dependencies and
environment variables needed to work on Inkscape:
base-commit: 8e1cca32b938cef0812ce042c6c2e8bccb326ec7
--
2.38.1
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--- Begin Message ---
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Subject: |
Re: bug#61094: [PATCH] doc: Document 'shebang' for 'guix shell'. |
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Date: |
Thu, 16 Mar 2023 12:21:59 +0100 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) |
Hi Simon,
Simon Tournier <zimon.toutoune@gmail.com> skribis:
> * doc/guix.texi (Invoking guix shell): Add a note mentioning how to use
> 'shebang'.
Applied with the changes below.
Thanks!
Ludo’.
diff --git a/doc/guix.texi b/doc/guix.texi
index 9c1fc04265..aa98d7df4b 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -5940,16 +5940,19 @@ guix shell python python-numpy -- python3
@end example
@quotation Note
-@cindex shebang
-@command{guix shell} can be used as @emph{shebang}. Consider the
-previous example as an executable Python script, the @emph{shebang}
-reads,
+@cindex shebang, for @command{guix shell}
+@command{guix shell} can be also be used as a script interpreter, also
+known as @dfn{shebang}. Here is an example self-contained Python script
+making use of this feature:
@example
-#!/usr/bin/env -S guix shell python python-nympy -- python3
+#!/usr/bin/env -S guix shell python python-numpy -- python3
+import numpy
+print("This is numpy", numpy.version.version)
@end example
-All the @var{options} or convenience of @command{guix shell} apply.
+You may pass any @command{guix shell} option, but there's one caveat:
+the Linux kernel has a limit of 127 bytes on shebang length.
@end quotation
Development environments can be created as in the example below, which
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