demos: run scripts in a fixed environment and record with term-transc…

…ript

demos/helpers.sh

@@ -39,3 +39,27 @@ comment() {
   echo -e "\033[0;32m${indented}\033[0m"
   blank
 }
+
+git_config() {
+  cat <<'EOF' > "$1"
+[color]
+ui=always
+EOF
+}
+
+jj_config() {
+  cat <<'EOF' > "$1"
+[user]
+name = "JJ Fan"
+email = "[email protected]"
+
+[operation]
+hostname = "jujube"
+username = "jjfan"
+
+[ui]
+color="always"
+paginate="never"
+log-word-wrap=true  # Need to set COLUMNS for this to work
+EOF
+}

demos/run_script.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+set -euo pipefail
+. "$(dirname "$0")"/helpers.sh
+
+which term-transcript > /dev/null || echo "\`term-transcipt\` must be installed with e.g. \`cargo binstall term-transcript-cli\`. See also https://github.com/slowli/term-transcript"
+which convert > /dev/null || echo "\`convert\` from ImageMagik needs to be installed to create pngs. Only svgs will be created." >&2
+
+echo "jj --version: (set PATH to change)"
+jj --version
+
+JJ_CONFIG=$(mktemp --tmpdir jjconfig-XXXX.toml)
+export JJ_CONFIG
+jj_config "$JJ_CONFIG"
+
+GIT_CONFIG_GLOBAL=$(mktemp --tmpdir gitconfig-XXXX)
+export GIT_CONFIG_GLOBAL
+git_config "$GIT_CONFIG_GLOBAL"
+
+# Make `jj` wrap text as opposed to `term-transcript`
+# Currently, 80 is the only value the tool supports when
+# used as a CLI.
+# https://github.com/slowli/term-transcript/issues/59
+COLUMNS=80
+export COLUMNS
+
+for script in "$@"; do
+  script_base="${script%.sh}"
+  script_base="${script_base#demo_}"
+  (bash "$script" || echo 'SCRIPT FAIL') 2>&1 | tee /dev/stderr | term-transcript capture --no-inputs --pure-svg --out "$script_base".svg "$script_base"
+  # Resize to 700 width and any height
+  which convert > /dev/null && convert  -resize 700x10000 -colors 50 -background black "$script_base".svg "$script_base".png || true
+done