[bug#51791] [PATCH 1/2]: Update guile-bash

[david larsson <david.larsson@selfhosted.xyz>]

[-- Attachment #1: Type: text/plain, Size: 1263 bytes --]

On 2021-11-12 14:56, david larsson wrote:
> Hi,
> 
> The following 2 patches update the guile-bash source url and
> home-page, and adds a patch for it that does 2 things:
>   - fixes a bug, see below
>   - enables reading newline- or null-separated arguments via stdin to
> guile-bash-defined bash functions.
> 
> The bug is that guile-bash can't read string args with whitespaces in
> it. Example:
> ------------------------
> ~$ enable -f ~/.guix-profile/lib/bash/libguile-bash.so scm
> ~$ scm /tmp/printargs
> ~$ printargs "apa bepa" cepa
> In procedure printargs: scm-function called from Bash with args (apa
> bepa cepa) failed to match signature (file1 file2)
> ~$ cat /tmp/printargs
> (use-modules
>  (gnu bash))
> (define-bash-function (printargs file1 file2)
>     (display file1)
>     (display "\n")
>     (display file2)
>     (display "\n"))
> -------------------------
> 
> After this patch, you can read args "as normal", or via stdin that are
> either newline- or null-separated:
> -------------------------
> ~$ printargs "apa bepa" cepa
> apa bepa
> cepa
> ~$ echo "$apa"
> aba
> aca
> ~$ printf '%s\0' "$apa" bepa | printargs -z
> aba
> aca
> bepa
> ~$ echo "$apa" | printargs
> aba
> aca
> -------------------------
> 
> Best regards,
> David

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: 0002-gnu-guile-bash-Add-patch-that-fixes-reading-args.patch --]
[-- Type: text/x-diff; name=0002-gnu-guile-bash-Add-patch-that-fixes-reading-args.patch, Size: 3438 bytes --]

From 10cc67f7c25991ec2aca2044a9e18e90001d7a1a Mon Sep 17 00:00:00 2001
From: David Larsson <david.larsson@selfhosted.xyz>
Date: Fri, 12 Nov 2021 13:42:41 +0100
Subject: [PATCH 2/2] gnu: guile-bash: Add patch that fixes reading args.

This patch allows guile-bash defined bash-functions
to read newline- or null-separated arguments from stdin,
making it usable in bash pipelines. It also fixes a bug
with arguments containing whitespace not being properly
passed to the corresponding guile function.

* gnu/packages/guile-xyz (guile-bash)[patches]: add patch.
* gnu/packages/patches/guile-bash-args-from-stdin.patch: new file.
---
 gnu/packages/guile-xyz.scm                    |  1 +
 .../patches/guile-bash-args-from-stdin.patch  | 42 +++++++++++++++++++
 2 files changed, 43 insertions(+)
 create mode 100644 gnu/packages/patches/guile-bash-args-from-stdin.patch

diff --git a/gnu/packages/guile-xyz.scm b/gnu/packages/guile-xyz.scm
index 1d35c41796..511d766a6f 100644
--- a/gnu/packages/guile-xyz.scm
+++ b/gnu/packages/guile-xyz.scm
@@ -419,6 +419,7 @@ dictionary and suggesting spelling corrections.")
                 (uri (git-reference
                       (commit commit)
                       (url home-page)))
+                (patches (search-patches "guile-bash-args-from-stdin.patch"))
                 (sha256
                  (base32
                   "097vny990wp2qpjij6a5a5gwc6fxzg5wk56inhy18iki5v6pif1p"))
diff --git a/gnu/packages/patches/guile-bash-args-from-stdin.patch b/gnu/packages/patches/guile-bash-args-from-stdin.patch
new file mode 100644
index 0000000000..ad42616c70
--- /dev/null
+++ b/gnu/packages/patches/guile-bash-args-from-stdin.patch
@@ -0,0 +1,42 @@
+From a124921666a16cb4e93f59a653f98b99c78eb2ca Mon Sep 17 00:00:00 2001
+From: David Larsson <david.larsson@selfhosted.xyz>
+Date: Thu, 11 Nov 2021 14:07:04 +0100
+Subject: [PATCH] Enable reading arguments from bash via stdin
+
+* lisp/gnu/bash.scm(define-bash-function): read from stdin
+to SCM_ARGS array when it is open, and separate args by null
+instead of newline if -z option is passed as $1.
+---
+ lisp/gnu/bash.scm | 16 ++++++++++++----
+ 1 file changed, 12 insertions(+), 4 deletions(-)
+
+diff --git a/lisp/gnu/bash.scm b/lisp/gnu/bash.scm
+index 199ebc0..e9dcea5 100644
+--- a/lisp/gnu/bash.scm
++++ b/lisp/gnu/bash.scm
+@@ -326,10 +326,18 @@
+       (hashq-set! *funcs* symbol thunk)
+       (unsafe-format/eval
+        "function ~a {
+-            SCM_ARGS=($@)    ;
+-            local retval=$~a ;
+-            unset SCM_ARGS   ;
+-            return $retval   ;
++            local -a Input SCM_ARGS                                          ;
++            [[ ! -t 0 ]] && mapfile -d '' Input                              ;
++            if [[ -n \"${Input[@]}\" ]]; then
++                if [[ \"$1\" == -z ]]; then
++                    local -a SCM_ARGS=\"(${Input[*]@Q})\"                    ;
++                else
++                    mapfile -t SCM_ARGS < <(printf '%s' \"${Input[@]}\"); fi ;
++            else
++                SCM_ARGS=(\"$@\"); fi                                        ;
++            local retval=$~a                                                 ;
++            unset SCM_ARGS                                                   ;
++            return $retval                                                   ;
+        }"
+        symbol special-varname))))
+ 
+-- 
+2.31.0
+
-- 
2.31.0