authorgravatar for hello@nektro.netMeghan Denny <hello@nektro.net> 2023-04-25 17:06:47 -07:00
committergravatar for hello@nektro.netMeghan Denny <hello@nektro.net> 2023-04-25 17:06:47 -07:00
logcc714914f69269db0c569ea416fa87142b388557
treed8e5abb0e5d90defd911e1cf25b183e98a7207df
parente97e004ec8e27431a01d9cf2956476b7a8703d7c

woo yay finally more methods

1 files changed, 52 insertions(+), 5 deletions(-)

git.zig+52-5
...@@ -2,10 +2,57 @@ const std = @import("std");...@@ -2,10 +2,57 @@ const std = @import("std");
2const string = []const u8;2const string = []const u8;
33
4/// Returns the result of running `git rev-parse HEAD`4/// Returns the result of running `git rev-parse HEAD`
5/// dir must already be pointing at the .git folder
5pub fn getHEAD(alloc: std.mem.Allocator, dir: std.fs.Dir) !string {6pub fn getHEAD(alloc: std.mem.Allocator, dir: std.fs.Dir) !string {
6 var dirg = try dir.openDir(".git", .{});7 const h = std.mem.trimRight(u8, try dir.readFileAlloc(alloc, "HEAD", 1024), "\n");
7 defer dirg.close();8
8 const h = std.mem.trimRight(u8, try dirg.readFileAlloc(alloc, "HEAD", 1024), "\n");9 if (std.mem.startsWith(u8, h, "ref:")) {
9 const r = std.mem.trimRight(u8, try dirg.readFileAlloc(alloc, h[5..], 1024), "\n");10 return std.mem.trimRight(u8, try dir.readFileAlloc(alloc, h[5..], 1024), "\n");
10 return r;11 }
12
13 // content should be 40-char sha1 hash
14 std.debug.assert(h.len == 40);
15 return h;
16}
17
18// TODO make this inspect .git/objects
19// https://git-scm.com/book/en/v2/Git-Internals-Git-Objects
20// https://git-scm.com/book/en/v2/Git-Internals-Packfiles
21pub fn getObject(alloc: std.mem.Allocator, dir: std.fs.Dir, obj: string) !string {
22 const result = try std.ChildProcess.exec(.{
23 .allocator = alloc,
24 .cwd_dir = dir,
25 .argv = &.{ "git", "cat-file", "-p", obj },
26 });
27 return result.stdout;
11}28}
29
30pub fn parseCommit(alloc: std.mem.Allocator, commitfile: string) !Commit {
31 var iter = std.mem.split(u8, commitfile, "\n");
32 var result: Commit = undefined;
33 var parents = std.ArrayList(string).init(alloc);
34 errdefer parents.deinit();
35 while (true) {
36 const line = iter.next().?;
37 if (line.len == 0) break;
38 const space = std.mem.indexOfScalar(u8, line, ' ').?;
39 const k = line[0..space];
40
41 if (std.mem.eql(u8, k, "tree")) result.tree = line[space + 1 ..];
42 if (std.mem.eql(u8, k, "author")) result.author = line[space + 1 ..];
43 if (std.mem.eql(u8, k, "committer")) result.committer = line[space + 1 ..];
44 if (std.mem.eql(u8, k, "parent")) try parents.append(line[space + 1 ..]);
45 }
46 result.parents = try parents.toOwnedSlice();
47 result.message = iter.rest();
48 return result;
49}
50
51pub const Commit = struct {
52 tree: string,
53 parents: []const string,
54 author: string,
55 committer: string,
56 gpgsig: string,
57 message: string,
58};