#!/usr/bin/env bash
set -euo pipefail

# Give an overview of the current state, including:
#
# * Current channel
# * State of tracked files with changes
# * Untracked files

current_channel() {
	local c=$(pijul channel | grep '^\*')
	printf "On channel %s\n" "${c:2}"
}

pijul_status() {
	pijul diff --short --untracked | awk -f <(cat - <<-'EOD'
	        BEGIN {
			ci = 0
			ui = 0
	        }
		/^[MR] .*/ {
			changes[ci++] = "modified " substr($0, 3)
		}
		/^A .*/ {
			changes[ci++] = "added " substr($0, 3)
		}
		/^D .*/ {
			changes[ci++] = "deleted " substr($0, 3)
		}
		/^U .*/ {
			untracked[ui++] = substr($0, 3)
		}
		END {
			if (ci > 0) {
				printf("\nUnrecorded changes:\n")
				printf("  (use 'pijul record' to record a new patch)\n")
				printf("  (use 'pijul reset' to discard changes)\n")
				for (c in changes) {
					printf("    %s\n", changes[c])
				}
			}
			if (ui > 0) {
				printf("\nUntracked files:\n")
				for (u in untracked) {
					printf("    %s\n", untracked[u])
				}
			}
			if (ci == 0 && ui == 0) {
				printf("nothing to record, working copy clean\n")
			}
		}
	EOD
	)
}

current_channel
pijul_status