Using `-S` inside `bat` does not chop long lines about bat

[SamuelLarkin]

I think I know what is happening. When calling bat file_with_long_lines.txt, the output generated by bat is line wrapped then passed to my pager which is less. When I type -S which is actually handled by the pager, less toggles line wrapping but since bat outputed a line wrapped content, toggling line wrapping in less has no effect.

How should I call bat to be able to toggle line wrapping?

[eth-p]

If it's not too much trouble, would you be able to add a screenshot to demonstrate?

Line chopping involves some complicated interactions between bat and less, and either one of them could be doing the wrapping. If the sidebar is enabled in bat and the text overflows the line into the sidebar area, bat isn't making any attempt to wrap the line. In that case, it may be less not receiving the -S flag from bat.

[SamuelLarkin]

bat file.csv

Pressing -S multiple times I still get the following:

───────┬──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
       │ File: delme.csv
───────┼──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
   1   │ lr=1.0e-4_e=1/000,42.10,41.15,44.25,44.01,42.44,41.65,43.51,42.43,43.10,42.38,41.86,41.10,42.39,41.88,42.44,41.87,39.96,39.24,41.27,40.50,41.62,40.98,41.01,4
       │ 0.29,40.14,39.56,42.01,41.13,39.23,38.35,42.28,41.46,40.73,39.80,40.76,39.70,41.72,40.56,40.90,40.40,40.62,39.53,43.28,42.01,43.49,43.95,42.43,42.55,39.13,37
       │ .94,41.82,40.61,41.80,41.32,40.25,39.27,40.35,39.04,43.13,42.10,39.44,39.18,42.84,42.85,42.02,41.23,41.82,40.14,40.34,38.64,42.11,41.79,44.25,43.41,42.36,41.
       │ 32,2024-01-26T06:07:38
   2   │ lr=1.0e-4_e=1/001,42.23,42.24,44.28,44.43,42.30,42.37,43.59,43.62,44.90,45.56,42.12,42.24,42.53,42.52,42.48,42.51,40.32,40.31,41.55,41.42,41.75,41.84,41.31,4
       │ 1.43,40.55,40.67,42.07,42.05,39.27,39.20,42.43,42.47,41.01,40.95,41.01,40.97,41.72,41.67,41.00,40.99,41.08,41.09,42.87,43.18,44.59,44.37,42.38,42.55,38.88,39
       │ .60,42.11,41.95,41.49,41.59,39.96,40.10,40.26,40.32,43.55,43.80,40.02,39.86,43.40,43.40,41.97,41.75,42.24,42.10,40.65,40.81,41.93,42.21,,41.08,41.09,41.84,20
       │ 24-02-20T15:08:58
   3   │ lr=1.0e-4_e=1/002,42.11,42.22,44.68,44.76,42.36,42.34,43.63,43.72,45.05,45.06,43.58,43.97,42.63,42.72,42.71,42.70,40.36,40.35,41.63,41.62,41.96,41.97,41.27,4
       │ 1.37,40.44,40.45,42.22,42.13,39.23,39.32,42.48,42.52,41.07,41.09,40.95,40.96,41.77,41.74,41.12,41.24,42.36,43.40,43.25,43.11,44.90,45.08,42.83,42.65,39.78,39
       │ .81,42.49,42.61,42.14,42.33,40.05,40.28,40.32,40.04,43.87,43.89,39.79,39.74,42.94,42.99,42.15,42.40,41.43,41.37,40.78,40.70,42.38,42.66,,43.25,43.11,42.09,20
       │ 24-02-20T15:21:35
   4   │ lr=1.0e-4_e=1/003,42.12,42.22,44.53,44.68,42.37,42.61,43.67,43.85,44.82,45.01,43.61,43.47,42.99,44.58,42.75,43.02,40.44,40.70,41.57,41.69,41.97,41.85,41.16,4
       │ 1.39,40.49,40.57,42.19,42.28,39.28,39.35,42.41,42.55,41.12,41.03,40.90,41.02,41.57,41.67,41.06,41.01,42.25,42.61,43.64,43.94,45.06,44.32,42.54,42.44,40.14,40
       │ .02,42.64,42.81,41.98,41.90,40.38,40.44,39.83,40.09,43.41,43.67,39.94,39.79,43.05,43.18,42.02,41.32,41.26,41.82,40.62,40.37,42.39,42.30,,45.06,44.32,42.12,20
       │ 24-02-20T15:33:11
   5   │ lr=1.0e-4_e=1/004,42.24,42.13,44.65,44.55,42.36,42.35,43.67,43.75,44.93,45.01,43.64,43.64,43.22,43.38,43.21,43.92,40.59,40.60,41.65,41.52,42.04,42.25,41.19,4
       │ 1.22,40.46,40.43,42.03,42.15,39.32,39.38,42.43,42.46,40.89,40.97,41.10,41.08,41.84,41.72,41.11,41.13,42.90,43.02,43.63,43.40,46.46,46.77,42.30,42.11,39.80,39
       │ .93,42.71,42.23,41.64,42.13,39.72,40.11,40.09,40.21,43.48,43.37,40.22,40.01,43.47,43.46,41.70,41.55,41.37,41.34,40.55,40.44,42.58,42.33,,42.30,42.11,42.10,20
       │ 24-02-20T15:48:35
   6   │ lr=1.0e-4_e=128/000,42.10,41.15,44.25,44.01,42.44,41.65,43.51,42.43,43.10,42.38,41.86,41.10,42.39,41.88,42.44,41.87,39.96,39.24,41.27,40.50,41.62,40.98,41.01
       │ ,40.29,40.14,39.56,42.01,41.13,39.23,38.35,42.28,41.46,40.73,39.80,40.76,39.70,41.72,40.56,40.90,40.40,40.62,39.53,43.28,42.01,43.49,43.95,42.43,42.55,39.13,
       │ 37.94,41.82,40.61,41.80,41.32,40.25,39.27,40.35,39.04,43.13,42.10,39.44,39.18,42.84,42.85,42.02,41.23,41.82,40.14,40.34,38.64,42.11,41.79,44.25,43.41,42.36,4
       │ 1.32,2024-01-26T06:07:38
   7   │ lr=1.0e-4_e=128/001,41.56,35.17,43.40,36.76,41.83,34.22,43.04,36.10,59.13,93.16,41.62,36.15,42.27,37.51,42.33,36.67,39.91,35.12,41.15,35.26,41.27,34.97,40.96
       │ ,34.99,40.22,35.33,41.52,35.71,38.94,30.52,41.72,34.56,40.49,33.61,40.34,33.74,41.17,35.25,40.49,34.15,42.14,38.27,42.62,36.60,44.14,38.97,42.26,36.53,39.08,
       │ 34.24,41.56,35.10,41.06,35.27,39.79,34.50,40.07,35.14,43.04,36.34,38.73,30.79,42.97,35.89,41.78,34.66,41.15,34.04,39.97,34.85,41.22,35.67,,42.14,38.27,39.34,
       │ 2024-02-20T15:14:39
   8   │ lr=1.0e-4_e=128/002,41.54,35.92,44.02,37.34,41.94,35.43,43.09,36.89,58.02,49.69,51.57,93.81,42.32,37.54,42.26,37.07,40.25,35.36,41.10,35.71,41.51,35.87,40.81
       │ ,35.36,40.38,35.82,41.84,36.11,38.73,31.50,41.97,35.53,40.48,34.12,40.49,34.47,41.15,35.23,40.50,34.77,51.95,99.33,43.67,39.35,43.93,37.49,42.58,36.19,39.41,
       │ 33.71,41.45,35.76,41.49,35.25,39.44,34.23,39.95,35.41,43.41,35.35,38.75,31.14,42.99,35.79,41.30,35.77,41.03,34.02,39.77,34.50,42.03,34.98,,43.67,39.35,40.84,
       │ 2024-02-20T19:59:50
   9   │ lr=1.0e-4_e=128/003,41.99,36.40,44.05,36.76,41.62,33.84,42.93,35.68,56.68,42.21,51.84,46.04,56.99,94.09,42.52,37.19,40.34,35.50,40.82,34.93,41.38,34.29,40.88
       │ ,34.50,40.18,34.79,41.86,34.89,38.58,30.71,41.77,34.59,40.14,33.53,40.16,33.53,41.17,35.42,40.63,33.98,50.94,39.14,58.09,99.27,45.50,41.06,42.12,36.92,40.08,
       │ 34.10,40.20,34.68,41.31,33.93,39.96,34.17,38.94,33.90,42.93,34.90,38.64,30.93,43.50,34.99,40.96,34.18,41.26,33.79,39.62,34.21,41.21,35.18,,45.50,41.06,41.03,
       │ 2024-02-20T23:43:20
  10   │ lr=1.0e-4_e=128/004,43.31,39.39,43.00,37.48,41.08,34.61,42.50,36.59,54.93,42.28,49.64,40.20,57.46,49.73,74.44,93.22,39.76,36.19,40.22,35.39,40.68,35.23,40.04
       │ ,34.76,39.53,35.43,41.12,35.63,37.66,31.73,40.84,35.12,39.49,34.49,39.34,34.78,40.57,36.42,39.89,34.60,49.57,39.64,54.12,42.62,78.41,99.48,42.54,38.18,39.85,
       │ 34.99,39.95,35.19,40.78,35.53,39.28,34.38,39.62,36.22,42.31,34.80,37.36,31.26,41.41,35.30,39.74,35.54,39.67,35.45,39.10,35.38,40.89,35.99,,42.54,38.18,41.95,
       │ 2024-02-21T04:26:24

---

bat -S file.csv

───────┬──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
       │ File: delme.csv
───────┼──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
   1   │ lr=1.0e-4_e=1/000,42.10,41.15,44.25,44.01,42.44,41.65,43.51,42.43,43.10,42.38,41.86,41.10,42.39,41.88,42.44,41.87,39.96,39.24,41.27,40.50,41.62,40.98,41.01,>
   2   │ lr=1.0e-4_e=1/001,42.23,42.24,44.28,44.43,42.30,42.37,43.59,43.62,44.90,45.56,42.12,42.24,42.53,42.52,42.48,42.51,40.32,40.31,41.55,41.42,41.75,41.84,41.31,>
   3   │ lr=1.0e-4_e=1/002,42.11,42.22,44.68,44.76,42.36,42.34,43.63,43.72,45.05,45.06,43.58,43.97,42.63,42.72,42.71,42.70,40.36,40.35,41.63,41.62,41.96,41.97,41.27,>
   4   │ lr=1.0e-4_e=1/003,42.12,42.22,44.53,44.68,42.37,42.61,43.67,43.85,44.82,45.01,43.61,43.47,42.99,44.58,42.75,43.02,40.44,40.70,41.57,41.69,41.97,41.85,41.16,>
   5   │ lr=1.0e-4_e=1/004,42.24,42.13,44.65,44.55,42.36,42.35,43.67,43.75,44.93,45.01,43.64,43.64,43.22,43.38,43.21,43.92,40.59,40.60,41.65,41.52,42.04,42.25,41.19,>
   6   │ lr=1.0e-4_e=128/000,42.10,41.15,44.25,44.01,42.44,41.65,43.51,42.43,43.10,42.38,41.86,41.10,42.39,41.88,42.44,41.87,39.96,39.24,41.27,40.50,41.62,40.98,41.0>
   7   │ lr=1.0e-4_e=128/001,41.56,35.17,43.40,36.76,41.83,34.22,43.04,36.10,59.13,93.16,41.62,36.15,42.27,37.51,42.33,36.67,39.91,35.12,41.15,35.26,41.27,34.97,40.9>
   8   │ lr=1.0e-4_e=128/002,41.54,35.92,44.02,37.34,41.94,35.43,43.09,36.89,58.02,49.69,51.57,93.81,42.32,37.54,42.26,37.07,40.25,35.36,41.10,35.71,41.51,35.87,40.8>
   9   │ lr=1.0e-4_e=128/003,41.99,36.40,44.05,36.76,41.62,33.84,42.93,35.68,56.68,42.21,51.84,46.04,56.99,94.09,42.52,37.19,40.34,35.50,40.82,34.93,41.38,34.29,40.8>
  10   │ lr=1.0e-4_e=128/004,43.31,39.39,43.00,37.48,41.08,34.61,42.50,36.59,54.93,42.28,49.64,40.20,57.46,49.73,74.44,93.22,39.76,36.19,40.22,35.39,40.68,35.23,40.0>
  11   │ lr=1.0e-4_e=16/000,42.10,41.15,44.25,44.01,42.44,41.65,43.51,42.43,43.10,42.38,41.86,41.10,42.39,41.88,42.44,41.87,39.96,39.24,41.27,40.50,41.62,40.98,41.01>
  12   │ lr=1.0e-4_e=16/001,41.56,41.21,43.40,42.67,41.83,41.19,43.04,42.27,59.13,78.25,41.62,40.93,42.27,41.69,42.33,41.70,39.91,39.44,41.15,40.34,41.27,40.75,40.96>
  13   │ lr=1.0e-4_e=16/002,41.54,40.71,44.02,43.26,41.94,41.22,43.09,41.88,58.02,59.42,51.57,76.72,42.32,41.63,42.26,41.61,40.25,39.54,41.10,40.37,41.51,41.00,40.81>
  14   │ lr=1.0e-4_e=16/003,41.99,42.02,44.05,43.26,41.62,41.01,42.93,42.52,56.68,55.57,51.84,53.31,56.99,75.39,42.52,41.63,40.34,39.65,40.82,40.26,41.38,40.68,40.88>
  15   │ lr=1.0e-4_e=16/004,43.31,43.35,43.00,42.88,41.08,40.97,42.50,42.61,54.93,54.79,49.64,49.50,57.46,57.39,74.44,76.10,39.76,39.77,40.22,40.18,40.68,40.57,40.04>
  16   │ lr=1.0e-4_e=2/000,42.10,41.15,44.25,44.01,42.44,41.65,43.51,42.43,43.10,42.38,41.86,41.10,42.39,41.88,42.44,41.87,39.96,39.24,41.27,40.50,41.62,40.98,41.01,>
  17   │ lr=1.0e-4_e=2/001,42.07,42.07,44.41,44.41,42.26,42.26,43.63,43.63,47.45,47.45,42.25,42.25,42.67,42.67,42.72,42.72,40.42,40.42,41.63,41.63,41.93,41.93,41.36,>
  18   │ lr=1.0e-4_e=2/002,42.06,41.98,44.70,44.65,42.48,42.39,43.64,43.69,47.36,47.41,45.92,46.11,42.78,42.76,42.58,42.62,40.43,40.40,41.66,41.66,42.01,41.94,41.39,>
  19   │ lr=1.0e-4_e=2/003,42.25,42.27,44.37,44.37,42.40,42.46,43.75,43.71,47.62,47.45,45.83,45.77,46.01,46.32,42.95,43.04,40.81,40.90,41.69,41.75,42.09,42.02,41.35,>
  20   │ lr=1.0e-4_e=2/004,42.30,42.25,44.39,44.56,42.49,42.17,43.73,43.70,47.52,47.26,45.81,45.52,45.92,46.25,43.06,46.11,40.96,40.95,41.72,41.63,41.94,41.92,41.27,>
  21   │ lr=1.0e-4_e=32/000,42.10,41.15,44.25,44.01,42.44,41.65,43.51,42.43,43.10,42.38,41.86,41.10,42.39,41.88,42.44,41.87,39.96,39.24,41.27,40.50,41.62,40.98,41.01>
  22   │ lr=1.0e-4_e=32/001,41.56,40.20,43.40,41.81,41.83,40.41,43.04,41.11,59.13,92.57,41.62,39.96,42.27,40.91,42.33,40.68,39.91,38.38,41.15,39.44,41.27,39.68,40.96>
  23   │ lr=1.0e-4_e=32/002,41.54,39.96,44.02,42.45,41.94,40.23,43.09,41.27,58.02,58.68,51.57,93.00,42.32,40.75,42.26,40.77,40.25,38.83,41.10,39.77,41.51,40.22,40.81>
  24   │ lr=1.0e-4_e=32/003,41.99,41.51,44.05,42.38,41.62,39.88,42.93,41.30,56.68,52.52,51.84,53.09,56.99,93.03,42.52,40.80,40.34,38.93,40.82,39.43,41.38,39.67,40.88>
  25   │ lr=1.0e-4_e=32/004,43.31,43.93,43.00,42.13,41.08,40.24,42.50,41.90,54.93,52.89,49.64,47.95,57.46,57.40,74.44,92.17,39.76,39.22,40.22,39.48,40.68,40.05,40.04>
  26   │ lr=1.0e-4_e=4/000,42.10,41.15,44.25,44.01,42.44,41.65,43.51,42.43,43.10,42.38,41.86,41.10,42.39,41.88,42.44,41.87,39.96,39.24,41.27,40.50,41.62,40.98,41.01,>
  27   │ lr=1.0e-4_e=4/001,42.00,42.05,44.27,44.27,42.33,42.19,43.49,43.44,49.74,51.49,42.21,42.19,42.62,42.55,42.62,42.69,40.40,40.27,41.49,41.43,41.71,41.53,41.45,>
  28   │ lr=1.0e-4_e=4/002,42.00,41.91,44.51,44.41,42.35,42.06,43.53,43.54,49.86,49.49,44.91,49.27,42.70,42.62,42.72,42.59,40.41,40.50,41.64,41.29,42.00,41.76,41.28,>
  29   │ lr=1.0e-4_e=4/003,42.50,42.50,44.55,44.55,42.31,42.31,43.53,43.53,49.10,49.10,44.98,44.98,49.94,49.94,43.03,43.03,40.90,40.90,41.66,41.66,41.95,41.95,41.41,>
  30   │ lr=1.0e-4_e=4/004,42.41,42.91,44.43,44.44,42.29,42.07,43.46,43.50,49.12,48.70,45.14,44.63,49.75,49.96,43.11,49.64,41.00,41.13,41.57,41.44,41.99,41.92,41.38,>
  31   │ lr=1.0e-4_e=64/000,42.10,41.15,44.25,44.01,42.44,41.65,43.51,42.43,43.10,42.38,41.86,41.10,42.39,41.88,42.44,41.87,39.96,39.24,41.27,40.50,41.62,40.98,41.01>
  32   │ lr=1.0e-4_e=64/001,41.56,38.38,43.40,40.38,41.83,38.24,43.04,39.60,59.13,93.47,41.62,38.82,42.27,39.81,42.33,39.31,39.91,37.36,41.15,37.87,41.27,38.10,40.96>
  33   │ lr=1.0e-4_e=64/002,41.54,38.78,44.02,40.38,41.94,38.73,43.09,39.94,58.02,54.38,51.57,93.92,42.32,39.65,42.26,39.50,40.25,37.73,41.10,38.29,41.51,38.64,40.81>
  34   │ lr=1.0e-4_e=64/003,41.99,39.51,44.05,39.57,41.62,36.90,42.93,39.15,56.68,47.41,51.84,49.96,56.99,94.20,42.52,39.25,40.34,37.28,40.82,37.50,41.38,37.44,40.88>
  35   │ lr=1.0e-4_e=64/004,43.31,42.55,43.00,40.81,41.08,38.56,42.50,40.40,54.93,48.79,49.64,44.78,57.46,53.96,74.44,93.29,39.76,38.11,40.22,38.35,40.68,38.54,40.04>
  36   │ lr=1.0e-4_e=8/000,42.10,41.15,44.25,44.01,42.44,41.65,43.51,42.43,43.10,42.38,41.86,41.10,42.39,41.88,42.44,41.87,39.96,39.24,41.27,40.50,41.62,40.98,41.01,>
  37   │ lr=1.0e-4_e=8/001,41.56,41.59,43.40,43.28,41.83,41.85,43.04,42.94,59.13,59.59,41.62,41.60,42.27,42.28,42.33,42.32,39.91,39.90,41.15,41.06,41.27,41.24,40.96,>
  38   │ lr=1.0e-4_e=8/002,41.54,41.44,44.02,43.94,41.94,41.90,43.09,42.95,58.02,58.35,51.57,57.46,42.32,42.29,42.26,42.29,40.25,40.26,41.10,41.02,41.51,41.29,40.81,>
  39   │ lr=1.0e-4_e=8/003,42.08,42.08,44.16,44.14,41.88,41.73,43.13,43.00,57.02,56.79,51.62,51.83,52.15,56.12,42.63,42.46,40.71,40.48,41.11,40.90,41.53,41.51,41.16,>
  40   │ lr=1.0e-4_e=8/004,42.95,42.90,43.86,43.82,41.68,41.53,43.06,42.99,55.98,55.92,50.34,50.25,52.29,52.41,55.69,57.38,40.45,40.46,40.86,40.79,41.48,41.43,40.68,

[cohml]

I am having the same problem as @SamuelLarkin - less as my pager, -S not working.

Admittedly I've implemented much greater bat configuration than @SamuelLarkin, so maybe I borked something. But I swear I did not use to have this problem.

Note that invoking less -S directly yield the desired wrap-toggling behavior.

---

Software version

bat 0.24.0

Operating system

macOS 14.3.1 (Darwin 23.3.0)

Command-line

bat --diagnostic 

Environment variables

SHELL=/bin/zsh
PAGER=<not set>
LESS=<not set>
LANG=en_US.UTF-8
LC_ALL=<not set>
BAT_PAGER='less --chop-long-lines --RAW-CONTROL-CHARS --header=1 --jump-target=3 --line-num-width=0 --LONG-PROMPT --no-number-headers --shift=4 --status-column --use-color --color=HGk --color=NGk'
BAT_PAGING=<not set>
BAT_CACHE_PATH=<not set>
BAT_CONFIG_PATH=<not set>
BAT_OPTS='--italic-text=always --pager='\''less --chop-long-lines --RAW-CONTROL-CHARS --header=1 --jump-target=3 --line-num-width=0 --LONG-PROMPT --no-number-headers --shift=4 --status-column --use-color --color=HGk --color=NGk'\'' --style=changes,header-filename,rule,snip --theme=TwoDark --wrap=never'
BAT_STYLE=<not set>
BAT_TABS=<not set>
BAT_THEME=<not set>
XDG_CONFIG_HOME=<not set>
XDG_CACHE_HOME=<not set>
COLORTERM=truecolor
NO_COLOR=<not set>
MANPAGER='sh -c '\''col -bx | bat --language=man --style=plain --theme=Monokai\ Extended'\'''

System Config file

Could not read contents of '/etc/bat/config': No such file or directory (os error 2).

Config file

Could not read contents of '$HOME/.config/bat/config': No such file or directory (os error 2).

Custom assets metadata

Could not read contents of '$HOME/.cache/bat/metadata.yaml': No such file or directory (os error 2).

Custom assets

'$HOME/.cache/bat' not found

Compile time information

• Profile: release
• Target triple: aarch64-apple-darwin
• Family: unix
• OS: macos
• Architecture: aarch64
• Pointer width: 64
• Endian: little
• CPU features: aes,crc,dit,dotprod,dpb,dpb2,fcma,fhm,flagm,fp16,frintts,jsconv,lor,lse,neon,paca,pacg,pan,pmuv3,ras,rcpc,rcpc2,rdm,sb,sha2,sha3,ssbs,vh
• Host: aarch64-apple-darwin

Less version

> less --version 
less 643 (PCRE2 regular expressions)
Copyright (C) 1984-2023  Mark Nudelman

less comes with NO WARRANTY, to the extent permitted by law.
For information about the terms of redistribution,
see the file named README in the less distribution.
Home page: https://greenwoodsoftware.com/less

---

In the interest of linking issues, #2837 may be of minor relevance.

[cohml]

Actually, in investigating this further, I realized that less's --header option - which I specify in my BAT_PAGER - seems to disable -S.

@SamuelLarkin doesn't seem to be using that flag, but it may explain this issue in my case at least. I've opened an issue for it (gwsw/less#487).