[no merge] Octave development branch

.github/workflows/octave-tests.yml

@@ -0,0 +1,25 @@
+name: Chebfun Tests on Octave
+
+on: [push, pull_request, workflow_dispatch]
+
+jobs:
+  test-octave:
+    runs-on: ubuntu-latest
+    container:
+      # Container is built from the "classdef" branch of the 
+      # github.com/kolmanthomas/octave repo
+      image: ghcr.io/kolmanthomas/octave:classdef
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Run Chebfun tests
+        run: octave --eval "addpath(genpath(pwd)); chebtest('--log')"
+
+      - name: Upload log file
+        uses: actions/upload-artifact@v4
+        with:
+          name: chebtest-log
+          path: ./*.log
+          retention-days: 30
+

.github/workflows/octave_pkg.yml

@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: FSFAP
+# Copyright 2025 The Chebfun Developers
+# See http://www.chebfun.org/ for Chebfun information.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.  This file is offered as-is,
+# without any warranty.
+
+name: Octave packaging
+
+on:
+  push:
+  pull_request:
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  octave-pkg:
+    name: Octave package
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Assemble Octave pkg
+        run: |
+          uname -a
+          pwd
+          cd octave_pkg
+          ./make_oct_pkg.sh
+          ls
+          md5sum chebfun-*.tar.gz
+          sha256sum chebfun-*.tar.gz
+
+      - name: Container setup
+        run: |
+          uname -a
+          docker pull docker.io/gnuoctave/octave:10.2.0
+          docker run --name=oc --detach --init \
+            --volume=$PWD:/workdir/chebfun:rw \
+            gnuoctave/octave:10.2.0 sleep inf
+          # FIXME: workaround "fatal: unsafe repository" error
+          # For more details, see https://stackoverflow.com/q/71901632
+          # and https://github.com/actions/checkout/issues/760
+          docker exec oc git config --global --add safe.directory /workdir/chebfun
+          # docker exec oc octave-cli --eval "pkg install struct optim"
+
+      - name: Try to install the package (should fail as we need Octave >= 11)
+        run: docker exec oc octave-cli --eval "cd chebfun/octave_pkg; try, pkg install chebfun-*.tar.gz, exit(1), catch err, disp(err.message), end"
+
+      - name: Keep built package as artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: octave-dev-package
+          path: octave_pkg/chebfun-*.tar.gz
+
+      - name: Stop container
+        run: |
+          docker stop oc
+          docker rm oc

@ballfun/disp.m

@@ -27,7 +27,12 @@ function disp( f )
 % Display one ballfun function 
 function display_ballfun(f)
 
-loose = strcmp(get(0, 'FormatSpacing'), 'loose');
+if is_octave()
+    [fmt, spacing] = format();
+    loose = strcmp(spacing, 'loose');
+else
+    loose = strcmp(get(0, 'FormatSpacing'), 'loose');
+end
 
 if isempty(f)
     fprintf('    empty ballfun\n')    

@ballfun/display.m

@@ -11,7 +11,14 @@ function display(X)
 % Copyright 2019 by The University of Oxford and The Chebfun Developers.
 % See http://www.chebfun.org/ for Chebfun information.
 
-if ( isequal(get(0, 'FormatSpacing'), 'compact') )
+if is_octave()
+    [fmt, spacing] = format();
+    compact = strcmp(spacing, 'compact');
+else
+    compact = strcmp(get(0, 'FormatSpacing'), 'compact');
+end
+
+if ( compact )
 	disp([inputname(1), ' =']);
 	disp(X);
 else
@@ -20,4 +27,4 @@ function display(X)
 	disp(' ');
     disp(X);
 end
-end
+end

@ballfunv/disp.m

@@ -4,7 +4,12 @@ function disp(f)
 % Copyright 2019 by The University of Oxford and The Chebfun Developers.
 % See http://www.chebfun.org/ for Chebfun information.
 
-loose = strcmp(get(0,'FormatSpacing'),'loose');
+if is_octave()
+    [fmt, spacing] = format();
+    loose = strcmp(spacing, 'loose');
+else
+    loose = strcmp(get(0, 'FormatSpacing'), 'loose');
+end
 
 % Compact version:
 if ( isempty(f) )
@@ -22,4 +27,4 @@ function disp(f)
     disp(F{j});
 end
 
-end
+end

@ballfunv/display.m

@@ -10,8 +10,14 @@ function display(X)
 % Copyright 2019 by The University of Oxford and The Chebfun Developers.
 % See http://www.chebfun.org/ for Chebfun information.
 
+if is_octave()
+    [fmt, spacing] = format();
+    compact = strcmp(spacing, 'compact');
+else
+    compact = strcmp(get(0, 'FormatSpacing'), 'compact');
+end
 
-if ( isequal(get(0, 'FormatSpacing'), 'compact') )
+if ( compact )
 	disp([inputname(1), ' =']);
 	disp(X);
 else
@@ -21,4 +27,4 @@ function display(X)
     disp(X);
 end
 
-end
+end

@chebfun/conv.m

@@ -259,7 +259,7 @@
             % INTEGRAL is not available in versions of MATLAB prior to R2012a,
             % so if we're running on an older version, fall back to QUADGK.
             integrand = @(t) feval(f, t).*feval(g, x(k) - t);
-            if ( verLessThan('matlab', '7.14') )
+            if ( ~is_octave() && verLessThan('matlab', '7.14') )
                 out(k) = out(k) + quadgk(integrand, dom(j), dom(j+1), ...
                     'AbsTol', 1e-15, 'RelTol', 100*eps);
             else

@chebfun/dimCheck.m

@@ -1,10 +1,11 @@
 function out = dimCheck(f, g, ~)
 %DIMCHECK   Check dimension compatibility of two CHEBFUN objects.
-%   In MATLAB 2016a and below DIMCHECK(F, G) returns:
+%   The behaviour depends on whether "broadcasting" is suppported.
+%   Without broacasting (e.g., MATLAB <= 2016a) DIMCHECK(F, G) returns:
 %       1    if numColumns(F) == numColumns(G)
 %     error  otherwise.
 %
-%   In MATLAB 2016b and above DIMCHECK(F, G) returns:
+%   With brodcasting (e.g., MATLAB >= 2016b) DIMCHECK(F, G) returns:
 %       1    if numColumns(F) == numColumns(G)
 %      -1    if numColumns(F) == 1 or numColumns(G) == 1
 %     error  otherwise.
@@ -29,8 +30,8 @@
 end
 
 % Adjust for MATLAB version if out = -1:
-if ( (out == -1 ) && verLessThan('matlab', '9.1') )
-   out = 0; 
+if ( (out == -1 ) && ~is_octave() && verLessThan('matlab', '9.1') )
+   out = 0;
 end
 
 if ( out == 0 && nargin == 2 )

@chebfun/disp.m

@@ -7,7 +7,12 @@ function disp(f)
 % See http://www.chebfun.org/ for Chebfun information.
 
 % If the 'format loose' setting is enabled, we print additional linebreaks:
-loose = strcmp(get(0, 'FormatSpacing'), 'loose');
+if is_octave()
+    [fmt, spacing] = format();
+    loose = strcmp(spacing, 'loose');
+else
+    loose = strcmp(get(0, 'FormatSpacing'), 'loose');
+end
 
 s = '';
 

@chebfun/display.m

@@ -13,7 +13,14 @@ function display(X)
 % Copyright 2017 by The University of Oxford and The Chebfun Developers. 
 % See http://www.chebfun.org/ for Chebfun information.
 
-if ( isequal(get(0, 'FormatSpacing'), 'compact') )
+if is_octave()
+    [fmt, spacing] = format();
+    compact = strcmp(spacing, 'compact');
+else
+    compact = strcmp(get(0, 'FormatSpacing'), 'compact');
+end
+
+if ( compact )
     disp([inputname(1), ' =']);
     disp(X);
 else

@chebfun/get.m

@@ -100,14 +100,6 @@
         out = hscale(f);
     case 'ishappy'
         out = ishappy(f);
-    case fieldnames(f)
-        out = cell(1, numel(f));
-        for k = 1:1:numel(f)
-            out{k} = f(k).(prop);
-        end
-        if ( numel(out) == 1 )
-            out = out{1};
-        end
     case 'lval'
         dom = domain(f);
         out = feval(f, dom(1));
@@ -167,6 +159,14 @@ case fieldnames(f)
         warning('CHEBFUN:CHEBFUN:get:imps', ...
             '''imps'' property is deprecated.  Use ''deltas'' instead.');
         out = get(f, 'deltas');
+    case fieldnames(f)
+        out = cell(1, numel(f));
+        for k = 1:1:numel(f)
+            out{k} = f(k).(prop);
+        end
+        if ( numel(out) == 1 )
+            out = out{1};
+        end
     otherwise
         error('CHEBFUN:CHEBFUN:get:badProp', ...
             '''%s'' is not a recognized CHEBFUN property name.', prop);

@chebfun/nextpow2.m

@@ -25,7 +25,7 @@
 
 % NEXTPOW2 is not vectorized in versions of MATLAB prior to R2010a.  Vectorize
 % it manually if we're running on older platforms.
-if ( verLessThan('matlab', '7.10') )
+if ( ~is_octave() && verLessThan('matlab', '7.10') )
     mynextpow2 = @nextpow2Vectorized;
 else
     mynextpow2 = @nextpow2;