From 071201b3d2f89efca016e5addce3394c6ebbde9a Mon Sep 17 00:00:00 2001
From: t-bltg <tf.bltg@gmail.com>
Date: Mon, 20 Dec 2021 14:03:51 +0100
Subject: [PATCH] make image() throw

---
 .github/workflows/ci.yml | 2 +-
 src/UnicodePlots.jl      | 2 +-
 src/canvas/imgcanvas.jl  | 4 +++-
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ae689dff..fbd7f8f4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.6'   # LTS
+          - '1.0'   # oldest supported in Project.toml
           - '1'     # latest stable
           - 'nightly'
         os:
diff --git a/src/UnicodePlots.jl b/src/UnicodePlots.jl
index 623390cb..79f74f57 100644
--- a/src/UnicodePlots.jl
+++ b/src/UnicodePlots.jl
@@ -84,7 +84,7 @@ include("interface/heatmap.jl")
 include("interface/spy.jl")
 include("interface/boxplot.jl")
 
-image(args...; kwargs...) = @warn "not implemented, did you forget 'using ImageInTerminal' ?"
+image(args...; kwargs...) = error("not implemented, did you forget 'using ImageInTerminal' ?")
 
 function __init__()
     @require ImageInTerminal = "d8c32880-2388-543b-8c61-d9f865259254" begin
diff --git a/src/canvas/imgcanvas.jl b/src/canvas/imgcanvas.jl
index 671510a5..4cfd5c27 100644
--- a/src/canvas/imgcanvas.jl
+++ b/src/canvas/imgcanvas.jl
@@ -15,7 +15,9 @@ function render(c::ImgCanvas)
     if (c.sixel[] = ImageInTerminal.use_sixel(c.img))
         h, w = size(c.img)
         # determine the terminal carret size, in pixels
-        char_pixels = ImageInTerminal.Sixel.TerminalTools.query_terminal("\e[16t", r"\e\[6;(\d+);(\d+)t", stdout)
+        char_pixels = ImageInTerminal.Sixel.TerminalTools.query_terminal(
+            "\e[16t", r"\e\[6;(\d+);(\d+)t", stdout
+        )
         char_h, char_w = length(char_pixels) > 1 ? parse.(Int, char_pixels) : (15, 7)
         lines = String[]
         io = IOBuffer()