movescript.py

#! /usr/bin/env python

import sys, string

def analyze_log(path):
    logfile = open(path,"r")
    cont = logfile.readlines()
    logfile.close()
    cont = parse_log(cont)
    toinstall = {}
    while cont:
        endpos = cont.index("End")
        cut = cont[1:endpos]
        toinstall[cont[0]] = cut
        del cont[:endpos+1]
    toinstall = dict([(key, toinstall[key]) for key in toinstall if toinstall[key]])
    return toinstall
        
def parse_log(cont):
    cont_new = []
    for x in cont:
        if x[:5] == "Start":
            cont_new.append(string.strip(x))
        elif x[:3] == "End":
            cont_new.append("End")
        elif x[:7] == "Install":
            progs = string.split(x," ")
            for prog in progs:
                if prog != "Install:" and prog[0] != '(' and prog[0] not in '0123456789':
                    cont_new.append(prog)
        elif x[:7] == "Upgrade":
            pass
        elif x[:6] == "Remove" or x[:5] == "Purge":
            progs = string.split(x," ")
            for prog in progs:
                while cont_new.count(prog):
                    cont_new.remove(prog)
    return cont_new

def create_script(path,progs):
    script = open(path,"w")
    script.write("#! /bin/bash\n\n")
    script.write("# autocreated installation file with movescript.py\n")
    script.write("# comment files you don't want to install with sharp\n\n")
    for key in progs:
        script.write("# "+key+"\n")
        script.write("apt-get install "+string.join(progs[key],' ')+"\n")
    script.close()

def main(args):
    log = "/var/log/apt/history.log"
    if len(args) == 1:
        log = args[1]
        out = args[2]
    else:
        out = args[1]
    progs = analyze_log(log)
    create_script(out,progs)
    #print "Script created!"

if __name__ == "__main__":
    if len(sys.argv) == 1:
        print "run as 'python movescript.py [infile] outfile'"
    else: main(sys.argv)

So it is similar to pacman -Qqe on Arch Linux.