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Subject: [bug#68412] [PATCH] scripts: edit: Accept generic formatting parameter.
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This will hopefully end the opening of unwanted files.

* guix/scripts/edit.scm (%location-format): New parameter.
(location->location-specification): Use %location-format.
(spawn-editor): Adjust accordingly.

Fixes: Pass special flags to ‘kate’ <https://bugs.gnu.org/44272#14>
---
 doc/guix.texi         | 18 ++++++++++++++++++
 guix/scripts/edit.scm | 20 ++++++++++++++------
 2 files changed, 32 insertions(+), 6 deletions(-)

diff --git a/doc/guix.texi b/doc/guix.texi
index 811edd0bf7..8dca1272a2 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -13987,6 +13987,24 @@ Invoking guix edit
 @var{directory}}) allows you to add @var{directory} to the front of the
 package module search path and so make your own packages visible.

+By default, Guix assumes that @env{EDITOR} uses the
+``+@var{LINE} @var{FILE}'' convention to scroll to a particular line
+within a file.  However, not all editors use this convention.
+For instance, @command{kate} instead wants you to use @code{--line}.
+Some minimal editors may not even have an option to pass the line.
+In both cases, an additional file named ``+@var{LINE}'' would be
+opened instead.  To prevent this from happening, you can customize
+@env{GUIX_EDITOR_LOCATION_FORMAT}, using the literal strings
+`${FILE}' to denote @var{FILE} and `${LINE}' to denote @var{LINE}
+respectively.
+For instance:
+
+@example
+GUIX_EDITOR_LOCATION_FORMAT='${FILE}' guix edit gnome
+# will open @var{directory}/gnu/packages/gnome.scm, but not scroll to
+# the definition of gnome
+@end example
+
 @node Invoking guix download
 @section Invoking @command{guix download}

diff --git a/guix/scripts/edit.scm b/guix/scripts/edit.scm
index b7b4cd2514..13b8a4559c 100644
--- a/guix/scripts/edit.scm
+++ b/guix/scripts/edit.scm
@@ -25,6 +25,7 @@ (define-module (guix scripts edit)
   #:use-module ((guix diagnostics)
                 #:select (location-file location-line))
   #:use-module (gnu packages)
+  #:use-module (ice-9 string-fun)
   #:use-module (srfi srfi-1)
   #:use-module (srfi srfi-37)
   #:export (%editor
@@ -62,6 +63,10 @@ (define %editor
   ;; For development, user can set custom value for $EDITOR.
   (make-parameter (or (getenv "VISUAL") (getenv "EDITOR") "nano")))

+(define %location-format
+  (make-parameter (or (getenv "GUIX_EDITOR_LOCATION_FORMAT")
+                      "+${LINE} ${FILE}")))
+
 (define (search-path* path file)
   "Like 'search-path' but exit if FILE is not found."
   (let ((absolute-file-name (or (search-path path file)
@@ -78,18 +83,21 @@ (define (search-path* path file)
 (define (location->location-specification location)
   "Return the location specification for LOCATION for a typical editor command
 line."
-  (list (string-append "+"
-                       (number->string
-                        (location-line location)))
-        (search-path* %load-path (location-file location))))
+  (let* ((spec (peek (%location-format)))
+         (spec (string-replace-substring
+                spec "${LINE}"
+                (number->string (location-line location))))
+         (spec (string-replace-substring
+                spec "${FILE}"
+                (search-path* %load-path (location-file location)))))
+    spec))

 (define (spawn-editor locations)
   "Spawn (%editor) to edit the code at LOCATIONS, a list of <location>
 records, and exit."
   (catch 'system-error
     (lambda ()
-      (let ((file-names (append-map location->location-specification
-                                    locations)))
+      (let ((file-names (map location->location-specification locations)))
         ;; Use `system' instead of `exec' in order to sanely handle
         ;; possible command line arguments in %EDITOR.
         (exit (system (string-join (cons (%editor) file-names))))))

base-commit: 3619dd7d059d1141acf39872f57e55b458dc8257
-- 
2.41.0

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Liliana Marie Prikler <liliana.prikler@HIDDEN>
Subject: bug#68412: Acknowledgement ([PATCH] scripts: edit: Accept generic
 formatting parameter.)
Message-ID: <handler.68412.B.170510320624807.ack <at> debbugs.gnu.org>
References: <9a666abbf1cb4b7548c1a117eaa04b0de02145ae.1705103171.git.liliana.prikler@HIDDEN>
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Subject: [bug#68412] [PATCH] scripts: edit: Accept generic formatting parameter.
Resent-From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@HIDDEN>
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From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@HIDDEN>
In-Reply-To: <9a666abbf1cb4b7548c1a117eaa04b0de02145ae.1705103171.git.liliana.prikler@HIDDEN>
 (Liliana Marie Prikler's message of "Sat, 13 Jan 2024 00:35:29 +0100")
References: <9a666abbf1cb4b7548c1a117eaa04b0de02145ae.1705103171.git.liliana.prikler@HIDDEN>
Date: Sat, 27 Jan 2024 15:07:38 +0100
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Hi Liliana,

Liliana Marie Prikler <liliana.prikler@HIDDEN> skribis:

> This will hopefully end the opening of unwanted files.
>
> * guix/scripts/edit.scm (%location-format): New parameter.
> (location->location-specification): Use %location-format.
> (spawn-editor): Adjust accordingly.
>
> Fixes: Pass special flags to =E2=80=98kate=E2=80=99 <https://bugs.gnu.org=
/44272#14>

Rather: =E2=80=9CFixes <https://issues.guix.gnu.org/44272>.=E2=80=9D

> +By default, Guix assumes that @env{EDITOR} uses the
> +``+@var{LINE} @var{FILE}'' convention to scroll to a particular line
> +within a file.  However, not all editors use this convention.
> +For instance, @command{kate} instead wants you to use @code{--line}.
> +Some minimal editors may not even have an option to pass the line.
> +In both cases, an additional file named ``+@var{LINE}'' would be
> +opened instead.  To prevent this from happening, you can customize
> +@env{GUIX_EDITOR_LOCATION_FORMAT}, using the literal strings
> +`${FILE}' to denote @var{FILE} and `${LINE}' to denote @var{LINE}
> +respectively.

I=E2=80=99d word it slightly differently, like:

  @vindex GUIX_EDITOR_LOCATION_FORMAT
  The default convention used by @code{guix edit} when invoking
  @code{$EDITOR} is to pass it @code{+@VAR{line} @var{file}} to open
  @var{file} at the given @var{line}.  You can change this convention
  for editors that do not support it by setting
  @env{GUIX_EDITOR_LOCATION_FORMAT}.  For example, when using Kate, you
  should set:

  @example
  # Convention for =E2=80=98kate=E2=80=99.
  export GUIX_EDITOR_LOCATION_FORMAT=3D'--whatever ${FILE}'
  @end example

  Likewise, for @command{guix edit} to invoke VSCode, you must specify
  this setting:

  @example
  # Settings for VSCode.
  export GUIX_EDITOR_LOCATION_FORMAT=3D'--whatever ${FILE}'
  @end example
=20=20
> +  (let* ((spec (peek (%location-format)))

Leftover debugging statement?

I=E2=80=99m still wondering about the relative merits of this approach vs. =
the
less generic but ready-to-use special-casing of Kate and VSCode based on
the basename of $EDITOR, but I don=E2=80=99t have a strong opinion.

Otherwise LGTM, thanks!

Ludo=E2=80=99.

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Subject: [bug#68412] [PATCH v2] scripts: edit: Accept generic formatting parameter.
References: <9a666abbf1cb4b7548c1a117eaa04b0de02145ae.1705103171.git.liliana.prikler@HIDDEN>
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 Content preview:  This will hopefully end the opening of unwanted files. * guix/scripts/edit.scm
    (%location-format): New parameter. (location->location-specification): Use
    %location-format. (spawn-editor): Adjust accordingly. 
 
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This will hopefully end the opening of unwanted files.

* guix/scripts/edit.scm (%location-format): New parameter.
(location->location-specification): Use %location-format.
(spawn-editor): Adjust accordingly.

Fixes: Pass special flags to ‘kate’ <https://bugs.gnu.org/44272#14>
---
Am Samstag, dem 27.01.2024 um 15:07 +0100 schrieb Ludovic Courtès:
> Hi Liliana,
> 
> Liliana Marie Prikler <liliana.prikler@HIDDEN> skribis:
> 
> > This will hopefully end the opening of unwanted files.
> > 
> > * guix/scripts/edit.scm (%location-format): New parameter.
> > (location->location-specification): Use %location-format.
> > (spawn-editor): Adjust accordingly.
> > 
> > Fixes: Pass special flags to ‘kate’ <https://bugs.gnu.org/44272#14>
> 
> Rather: “Fixes <https://issues.guix.gnu.org/44272>.”
I'm using a convention that I've proposed earlier in [1].
Since we're currently adding ChangeIds without any of the supported
infra (AFAIK), I think following my own proposal here is fair game.
As for why I took the message instead of the bug itself, the bug was
marked as done without resolving it, so I think linking to the
message is more correct.

> [...]
> I’d word it slightly differently, like:
> [...]
I changed the wording.  Let me know WDYT.

> Leftover debugging statement?
Yup.

> I’m still wondering about the relative merits of this approach vs.
> the less generic but ready-to-use special-casing of Kate and VSCode
> [...]
With every decade bringing a new hot editor, we'd be special-casing
a lot.

Cheers

[1] https://lists.gnu.org/archive/html/guix-devel/2023-09/msg00225.html

 doc/guix.texi         | 29 +++++++++++++++++++++++++++++
 guix/scripts/edit.scm | 20 ++++++++++++++------
 2 files changed, 43 insertions(+), 6 deletions(-)

diff --git a/doc/guix.texi b/doc/guix.texi
index c458befb76..2ae3871464 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -13989,6 +13989,35 @@ Invoking guix edit
 @var{directory}}) allows you to add @var{directory} to the front of the
 package module search path and so make your own packages visible.
 
+@vindex GUIX_EDITOR_LOCATION_FORMAT
+The default convention used by @code{guix edit} when invoking
+@code{$EDITOR} is to pass it @code{+@var{line} @var{file}} to open
+@var{file} at the given @var{line}.
+You can change this convention for editors that do not support it
+by setting @env{GUIX_EDITOR_LOCATION_FORMAT}.
+For instance, to set things up with kate, use:
+
+@example
+export VISUAL=kate
+export GUIX_EDITOR_LOCATION_FORMAT='--line=$@{LINE@} $@{FILE@}'
+# Assume you want to hack on kate
+guix edit kate
+@end example
+
+Alternatively, for gnome-text-editor, which has no such flag, simply
+skip it:
+
+@example
+export VISUAL=gnome-text-editor
+export GUIX_EDITOR_LOCATION_FORMAT='$@{FILE@}'
+# Assume you want to hack on gnome
+guix edit gnome
+@end example
+
+Note, that Guix only matches the literal strings @code{$@{LINE@}} and
+@code{$@{FILE@}} here.  These may look like shell parameters, but their
+short form is currently not supported.
+
 @node Invoking guix download
 @section Invoking @command{guix download}
 
diff --git a/guix/scripts/edit.scm b/guix/scripts/edit.scm
index b7b4cd2514..130470dbc1 100644
--- a/guix/scripts/edit.scm
+++ b/guix/scripts/edit.scm
@@ -25,6 +25,7 @@ (define-module (guix scripts edit)
   #:use-module ((guix diagnostics)
                 #:select (location-file location-line))
   #:use-module (gnu packages)
+  #:use-module (ice-9 string-fun)
   #:use-module (srfi srfi-1)
   #:use-module (srfi srfi-37)
   #:export (%editor
@@ -62,6 +63,10 @@ (define %editor
   ;; For development, user can set custom value for $EDITOR.
   (make-parameter (or (getenv "VISUAL") (getenv "EDITOR") "nano")))
 
+(define %location-format
+  (make-parameter (or (getenv "GUIX_EDITOR_LOCATION_FORMAT")
+                      "+${LINE} ${FILE}")))
+
 (define (search-path* path file)
   "Like 'search-path' but exit if FILE is not found."
   (let ((absolute-file-name (or (search-path path file)
@@ -78,18 +83,21 @@ (define (search-path* path file)
 (define (location->location-specification location)
   "Return the location specification for LOCATION for a typical editor command
 line."
-  (list (string-append "+"
-                       (number->string
-                        (location-line location)))
-        (search-path* %load-path (location-file location))))
+  (let* ((spec (%location-format))
+         (spec (string-replace-substring
+                spec "${LINE}"
+                (number->string (location-line location))))
+         (spec (string-replace-substring
+                spec "${FILE}"
+                (search-path* %load-path (location-file location)))))
+    spec))
 
 (define (spawn-editor locations)
   "Spawn (%editor) to edit the code at LOCATIONS, a list of <location>
 records, and exit."
   (catch 'system-error
     (lambda ()
-      (let ((file-names (append-map location->location-specification
-                                    locations)))
+      (let ((file-names (map location->location-specification locations)))
         ;; Use `system' instead of `exec' in order to sanely handle
         ;; possible command line arguments in %EDITOR.
         (exit (system (string-join (cons (%editor) file-names))))))

base-commit: dc8aa525174d25331d74576faf0643e45bc152c4
-- 
2.41.0

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Hi,

On sam., 13 janv. 2024 at 00:35, Liliana Marie Prikler <liliana.prikler@HIDDEN> wrote:

> +@vindex GUIX_EDITOR_LOCATION_FORMAT
> +The default convention used by @code{guix edit} when invoking
> +@code{$EDITOR} is to pass it @code{+@var{line} @var{file}} to open
> +@var{file} at the given @var{line}.
> +You can change this convention for editors that do not support it
> +by setting @env{GUIX_EDITOR_LOCATION_FORMAT}.
> +For instance, to set things up with kate, use:
> +
> +@example
> +export VISUAL=kate
> +export GUIX_EDITOR_LOCATION_FORMAT='--line=$@{LINE@} $@{FILE@}'
> +# Assume you want to hack on kate
> +guix edit kate
> +@end example

First, it appears to me inconsistent to speak about EDITOR and then to
use VISUAL in the example.  I suggest to have:

    The default convention used by @code{guix edit} when invoking
    @code{$EDITOR} or @code{VISUAL} is to pass it @code{+@var{line} @var{file}} to open

and the same example.  Or change the example and replace with:

    export EDITOR=kate
    export GUIX_EDITOR_LOCATION_FORMAT='--line=$@{LINE@} $@{FILE@}'


Second, I think that using markers that can be interpreted by Bash shell
can lead to confusion.  For instance,

    $ LINE=foo; FILE=bar # somewhere in my config for whatever reasons

then:

--8<---------------cut here---------------start------------->8---
$ export GUIX_EDITOR_LOCATION_FORMAT='--line=${LINE} ${FILE}'
$ echo $GUIX_EDITOR_LOCATION_FORMAT
--line=${LINE} ${FILE}

$ export GUIX_EDITOR_LOCATION_FORMAT="--line=${LINE} ${FILE}"
$ echo $GUIX_EDITOR_LOCATION_FORMAT
--line=foo bar
--8<---------------cut here---------------end--------------->8---

Well, simple quote versus double quote appears to me subtle.


Since it is an hard text replacement, why not remove $ and just have the
placeholder {LINE} or {FILE}?  Or <LINE> and <FILE>?  Or whatever that
is not interpreted by common shells.


> +Note, that Guix only matches the literal strings @code{$@{LINE@}} and
> +@code{$@{FILE@}} here.  These may look like shell parameters, but their
> +short form is currently not supported.

Therefore, it would make that more clear or even obsolete.


Cheers,
simon

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Hi,

Liliana Marie Prikler <liliana.prikler@HIDDEN> skribis:

> This will hopefully end the opening of unwanted files.
>
> * guix/scripts/edit.scm (%location-format): New parameter.
> (location->location-specification): Use %location-format.
> (spawn-editor): Adjust accordingly.
>
> Fixes: Pass special flags to =E2=80=98kate=E2=80=99 <https://bugs.gnu.org=
/44272#14>

LGTM!

>> > Fixes: Pass special flags to =E2=80=98kate=E2=80=99 <https://bugs.gnu.=
org/44272#14>
>>=20
>> Rather: =E2=80=9CFixes <https://issues.guix.gnu.org/44272>.=E2=80=9D
> I'm using a convention that I've proposed earlier in [1].
> Since we're currently adding ChangeIds without any of the supported
> infra (AFAIK), I think following my own proposal here is fair game.

It=E2=80=99s not: conventions, by definition, are agreed upon collectively.
Regardless of the merits of a proposal, we first have to build consensus
for the proposal before starting using it.

Thanks,
Ludo=E2=80=99.

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Hi,

On Mon, 29 Jan 2024 at 14:24, Ludovic Court=C3=A8s <ludo@HIDDEN> wrote:

> LGTM!

This does not LGTM for the reason I invoked earlier: single-quote
versus double-quote and the interpretation of ${LINE}.

I think it would be less confusing to have another placeholder, as
just {LINE} or whatever else.

For what my opinion is worth.

Cheers,
simon

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From: Liliana Marie Prikler <liliana.prikler@HIDDEN>
Date: Mon, 29 Jan 2024 18:58:31 +0100
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Am Montag, dem 29.01.2024 um 12:10 +0100 schrieb Simon Tournier:
> Hi,
>=20
> On sam., 13 janv. 2024 at 00:35, Liliana Marie Prikler
> <liliana.prikler@HIDDEN> wrote:
>=20
> > +@vindex GUIX_EDITOR_LOCATION_FORMAT
> > +The default convention used by @code{guix edit} when invoking
> > +@code{$EDITOR} is to pass it @code{+@var{line} @var{file}} to open
> > +@var{file} at the given @var{line}.
> > +You can change this convention for editors that do not support it
> > +by setting @env{GUIX_EDITOR_LOCATION_FORMAT}.
> > +For instance, to set things up with kate, use:
> > +
> > +@example
> > +export VISUAL=3Dkate
> > +export GUIX_EDITOR_LOCATION_FORMAT=3D'--line=3D$@{LINE@} $@{FILE@}'
> > +# Assume you want to hack on kate
> > +guix edit kate
> > +@end example
>=20
> First, it appears to me inconsistent to speak about EDITOR and then
> to use VISUAL in the example.=C2=A0 I suggest to have:
>=20
> =C2=A0=C2=A0=C2=A0 The default convention used by @code{guix edit} when i=
nvoking
> =C2=A0=C2=A0=C2=A0 @code{$EDITOR} or @code{VISUAL} is to pass it @code{+@=
var{line}
> @var{file}} to open
>=20
> and the same example.=C2=A0 Or change the example and replace with:
>=20
> =C2=A0=C2=A0=C2=A0 export EDITOR=3Dkate
> =C2=A0=C2=A0=C2=A0 export GUIX_EDITOR_LOCATION_FORMAT=3D'--line=3D$@{LINE=
@} $@{FILE@}'
I think "or VISUAL" would be acceptable, but repeating what we wrote
earlier.  I wouldn't set EDITOR=3Dkate, because it is graphical after
all.

> Second, I think that using markers that can be interpreted by Bash
> shell can lead to confusion.=C2=A0 For instance,
>=20
> =C2=A0=C2=A0=C2=A0 $ LINE=3Dfoo; FILE=3Dbar # somewhere in my config for =
whatever
> reasons
>=20
> then:
>=20
> --8<---------------cut here---------------start------------->8---
> $ export GUIX_EDITOR_LOCATION_FORMAT=3D'--line=3D${LINE} ${FILE}'
> $ echo $GUIX_EDITOR_LOCATION_FORMAT
> --line=3D${LINE} ${FILE}
>=20
> $ export GUIX_EDITOR_LOCATION_FORMAT=3D"--line=3D${LINE} ${FILE}"
> $ echo $GUIX_EDITOR_LOCATION_FORMAT
> --line=3Dfoo bar
> --8<---------------cut here---------------end--------------->8---
>=20
> Well, simple quote versus double quote appears to me subtle.
>=20
> Since it is an hard text replacement, why not remove $ and just have
> the placeholder {LINE} or {FILE}?=C2=A0 Or <LINE> and <FILE>?=C2=A0 Or wh=
atever
> that is not interpreted by common shells.
Because it is only a hard text replacement *for now*.  We might find
that there's merit to having gash interpret these later on.  I know
there's like fifty conventions for formatting strings and we have to
pick one, but I'd like to think that this isn't just a pointless
exercise in forward compatibility.

> > +Note, that Guix only matches the literal strings @code{$@{LINE@}}
> > and
> > +@code{$@{FILE@}} here.=C2=A0 These may look like shell parameters, but
> > their
> > +short form is currently not supported.
>=20
> Therefore, it would make that more clear or even obsolete.
/me hints at "currently"

Cheers

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Hi,

Liliana Marie Prikler <liliana.prikler@HIDDEN> skribis:

>> Second, I think that using markers that can be interpreted by Bash
>> shell can lead to confusion.=C2=A0 For instance,

[...]

>> $ export GUIX_EDITOR_LOCATION_FORMAT=3D"--line=3D${LINE} ${FILE}"
>> $ echo $GUIX_EDITOR_LOCATION_FORMAT
>> --line=3Dfoo bar
>> --8<---------------cut here---------------end--------------->8---
>>=20
>> Well, simple quote versus double quote appears to me subtle.
>>=20
>> Since it is an hard text replacement, why not remove $ and just have
>> the placeholder {LINE} or {FILE}?=C2=A0 Or <LINE> and <FILE>?=C2=A0 Or w=
hatever
>> that is not interpreted by common shells.
> Because it is only a hard text replacement *for now*.  We might find
> that there's merit to having gash interpret these later on.  I know
> there's like fifty conventions for formatting strings and we have to
> pick one, but I'd like to think that this isn't just a pointless
> exercise in forward compatibility.

It=E2=80=99s true that someone not well versed in shell or someone distract=
ed
could easily find themselves having ${LINE} and ${FILE} shell-expanded
even though we precisely don=E2=80=99t want that.

One way out would be to use a different syntax, say, %LINE% and %FILE%.
With the syntax clearly different from shell variables, we=E2=80=99d avoid =
those
easy mistakes.

WDYT?

Ludo=E2=80=99.

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Am Mittwoch, dem 07.02.2024 um 23:22 +0100 schrieb Ludovic Court=C3=A8s:
> Hi,
>=20
> Liliana Marie Prikler <liliana.prikler@HIDDEN> skribis:
>=20
> > > Second, I think that using markers that can be interpreted by
> > > Bash
> > > shell can lead to confusion.=C2=A0 For instance,
>=20
> [...]
>=20
> > > $ export GUIX_EDITOR_LOCATION_FORMAT=3D"--line=3D${LINE} ${FILE}"
> > > $ echo $GUIX_EDITOR_LOCATION_FORMAT
> > > --line=3Dfoo bar
> > > --8<---------------cut here---------------end--------------->8---
> > >=20
> > > Well, simple quote versus double quote appears to me subtle.
> > >=20
> > > Since it is an hard text replacement, why not remove $ and just
> > > have the placeholder {LINE} or {FILE}?=C2=A0 Or <LINE> and <FILE>?=C2=
=A0 Or
> > > whatever that is not interpreted by common shells.
> > Because it is only a hard text replacement *for now*.=C2=A0 We might
> > find that there's merit to having gash interpret these later on.=C2=A0 =
I
> > know there's like fifty conventions for formatting strings and we
> > have to pick one, but I'd like to think that this isn't just a
> > pointless exercise in forward compatibility.
>=20
> It=E2=80=99s true that someone not well versed in shell or someone distra=
cted
> could easily find themselves having ${LINE} and ${FILE} shell-
> expanded even though we precisely don=E2=80=99t want that.
>=20
> One way out would be to use a different syntax, say, %LINE% and
> %FILE%.  With the syntax clearly different from shell variables, we=E2=80=
=99d
> avoid those easy mistakes.
>=20
> WDYT?
Well, I said my opinion already in reply to Simon, but if y'all
strongly feel that preventing this confusion is preferable and can
agree to a common syntax, by all means go ahead and commit it with that
change.

I do think there's value in having this interpretable by gash at some
point, but maybe I'm thinking too far into the future.

Cheers

Last modified: Thu, 8 Feb 2024 18:15:01 UTC

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Copyright (C) 1999 Darren O. Benham, 1997 nCipher Corporation Ltd, 1994-97 Ian Jackson.