thinArbitraryDatedBackups - keeps all hourly backups in last 2 days, one per day in last 31 days, one per week after [1022822]

// file names need to include the pattern "-YYYYMMDD-HH"
static void thinArbitraryDatedBackups(File dir, bool doIt) {
  new L<File> files;
  new Map<File, Double> ageMap;
  
  Pattern pat = regexp("-(20\\d\\d)(\\d\\d)(\\d\\d)-(\\d\\d)");
  for (File f : listFilesNotDirs(dir)) {
    S s = f.getName();
    Matcher matcher = pat.matcher(s);
    continue unless matcher.find();
    //print("Found backup: " + sfu(matcherGroups(matcher)));
    int year = matcherInt(matcher, 1);
    int month = matcherInt(matcher, 2);
    int day = matcherInt(matcher, 3);
    int hour = matcherInt(matcher, 4);
    long time = timestampFromYMDH(year, month, day, hour);
    double age = ((now()-time)/1000.0/60/60/24;
    //print("Age: " + age + " days");
    ageMap.put(f, age);
    files.add(f);
  }
  
  int numDeleted = 0;
  sortByMap_inPlace(files, ageMap);
  double lastAge = -1;
  for (File f : files) {
    double age = ageMap.get(f);
    if (!thinArbitraryDatedBackups_shouldKeep(age, lastAge)) {
      //print("Deleting: " + f);
      ++numDeleted;
      if (doIt) {
        print("Deleting: " + f);
        f.delete();
      }
    } else {
      print("Keeping: " + f);
      lastAge = age;
    }
  }
  if (numDeleted != 0)
    print((doIt ? "Deleted: " : "Would delete: ") + n(numDeleted, "file"));
}

// age = age in days
sbool thinArbitraryDatedBackups_shouldKeep(double age, double lastAge) {
  if (age <= 2) true;
  if (age <= 31 && age >= lastAge+1) true;
  if (age >= lastAge+7) true;
  false;
}

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Snippet ID:	#1022822
Snippet name:	thinArbitraryDatedBackups - keeps all hourly backups in last 2 days, one per day in last 31 days, one per week after
Eternal ID of this version:	#1022822/1
Text MD5:	27905c9385e6a22b6f825efbb11c9cb1
Author:	stefan
Category:	javax
Type:	JavaX fragment (include)
Public (visible to everyone):	Yes
Archived (hidden from active list):	No
Created/modified:	2019-04-09 11:41:50
Source code size:	1544 bytes / 50 lines
Pitched / IR pitched:	No / No
Views / Downloads:	281 / 306
Referenced in:	[show references]

< > BotCompany Repo | #1022822 // thinArbitraryDatedBackups - keeps all hourly backups in last 2 days, one per day in last 31 days, one per week after

JavaX fragment (include)

Author comment

1	// file names need to include the pattern "-YYYYMMDD-HH"
2	static void thinArbitraryDatedBackups(File dir, bool doIt) {
3	new L<File> files;
4	new Map<File, Double> ageMap;
5
6	Pattern pat = regexp("-(20\\d\\d)(\\d\\d)(\\d\\d)-(\\d\\d)");
7	for (File f : listFilesNotDirs(dir)) {
8	S s = f.getName();
9	Matcher matcher = pat.matcher(s);
10	continue unless matcher.find();
11	//print("Found backup: " + sfu(matcherGroups(matcher)));
12	int year = matcherInt(matcher, 1);
13	int month = matcherInt(matcher, 2);
14	int day = matcherInt(matcher, 3);
15	int hour = matcherInt(matcher, 4);
16	long time = timestampFromYMDH(year, month, day, hour);
17	double age = ((now()-time)/1000.0/60/60/24;
18	//print("Age: " + age + " days");
19	ageMap.put(f, age);
20	files.add(f);
21	}
22
23	int numDeleted = 0;
24	sortByMap_inPlace(files, ageMap);
25	double lastAge = -1;
26	for (File f : files) {
27	double age = ageMap.get(f);
28	if (!thinArbitraryDatedBackups_shouldKeep(age, lastAge)) {
29	//print("Deleting: " + f);
30	++numDeleted;
31	if (doIt) {
32	print("Deleting: " + f);
33	f.delete();
34	}
35	} else {
36	print("Keeping: " + f);
37	lastAge = age;
38	}
39	}
40	if (numDeleted != 0)
41	print((doIt ? "Deleted: " : "Would delete: ") + n(numDeleted, "file"));
42	}
43
44	// age = age in days
45	sbool thinArbitraryDatedBackups_shouldKeep(double age, double lastAge) {
46	if (age <= 2) true;
47	if (age <= 31 && age >= lastAge+1) true;
48	if (age >= lastAge+7) true;
49	false;
50	}