#!/usr/bin/python

# Graph the number of installed packages over time by parsing /var/log/pacman.log

from datetime import datetime
from matplotlib import pyplot as plt


with open('/var/log/pacman.log', 'r') as f:
    cnt = 0
    installed = 0
    removed = 0
    x = []
    y = []
    for line in f.readlines():
        if '[ALPM]' not in line or 'warning' in line:
            # Ignore operations
            continue

        if ' installed' in line:
            cnt += 1
            installed += 1
        elif 'removed' in line:
            cnt -= 1
            removed += 1
        else:
            continue

        x.append(datetime.fromisoformat(line[1:23] + ':00'))
        y.append(cnt)


print('Currently installed packages:', cnt)
print('Total installed packages:', installed)
print('Total removed packages:', removed)
plt.plot(x, y)
plt.savefig('pac.png')
plt.show()