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check-env-diff.fish
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| #!/usr/bin/env fish | |
| function check-env-diff | |
| # Check arguments | |
| if test (count $argv) -lt 1 | |
| echo "Please input command as the 1st argument." | |
| return | |
| end | |
| set cmd $argv[1..-1] | |
| # Save env before command | |
| env | sort >/tmp/before.env | |
| # Execute command | |
| eval "$cmd" >/dev/null 2>&1 | |
| # Save env after command | |
| env | sort >/tmp/after.env | |
| # Compare env | |
| set env_diff_lines (diff /tmp/before.env /tmp/after.env) | |
| # Get different key names | |
| set different_key_names | |
| for env_diff_line in $env_diff_lines | |
| set -l pattern "^[<>] (\w+).*" | |
| if not string match -q -r -- $pattern "$env_diff_line" | |
| continue | |
| end | |
| set different_key_name (string replace -r -- $pattern "\$1" "$env_diff_line") | |
| if not contains $different_key_name $different_key_names | |
| set different_key_names $different_key_names $different_key_name | |
| end | |
| end | |
| # Show different key names | |
| printf "%s\n" $different_key_names | |
| end | |
| if test (count $argv) -ge 1 | |
| check-env-diff $argv | |
| end |
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