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const std = @import("std");
const assert = std.debug.assert;
const fs = @import("fs.zig");
const shell = @import("shell.zig");
const cli = @import("cli.zig");
const Env = @import("env.zig");
const fatal = cli.fatal;
pub const Commit = struct {
hash: []const u8,
timestamp: u64,
pub fn init_empty() Commit {
return .{ .hash = "", .timestamp = 0 };
}
pub fn parse(version_str: []const u8) !Commit {
const s = std.mem.trim(u8, version_str, " \t");
if (s.len == 0) return .init_empty();
const pos = std.mem.indexOfScalar(u8, s, '@') orelse return error.invalid_commit;
return .{
.hash = s[0..pos],
.timestamp = std.fmt.parseInt(u64, s[pos + 1 ..], 10) catch return error.invalid_commit,
};
}
pub fn format(self: Commit, w: *std.io.Writer) std.io.Writer.Error!void {
if (self.hash.len > 0) {
try w.print("{s}@{d}", .{ self.hash, self.timestamp });
}
}
};
pub const Repo = struct {
path: fs.Path,
url: []const u8,
branch: []const u8,
pub fn clone(self: Repo, env: Env) !void {
const dir = try fs.dir_info(self.path);
if (!dir.exists or dir.empty) {
var branch_buf: [std.fs.max_name_bytes]u8 = undefined;
const branch_param = branch_buf[0 .. 9 + self.branch.len];
@memcpy(branch_param[0..9], "--branch=");
@memcpy(branch_param[9..], self.branch);
const res = shell.exec(.{
.env = env,
.argv = &.{ "git", "clone", "--quiet", "--depth=1", branch_param, self.url, self.path.name() },
});
switch (res) {
.success => |out| env.dealloc(out),
.failure => |out| {
env.err("failed to clone {s}\n", .{self.url});
fatal("{s}", .{out});
},
}
}
}
pub fn reset(self: Repo, env: Env) void {
var res = shell.exec(.{
.env = env,
.argv = &.{ "git", "reset", "--hard" },
.cwd = self.path,
});
switch (res) {
.success => |out| env.dealloc(out),
.failure => |out| {
env.err("failed to reset repository: {s}\n", .{self.path.name()});
fatal("{s}", .{out});
},
}
res = shell.exec(.{
.env = env,
.argv = &.{ "git", "clean", "-fdx" },
.cwd = self.path,
});
switch (res) {
.success => |out| env.dealloc(out),
.failure => |out| {
env.err("failed to clean repository: {s}\n", .{self.path.name()});
fatal("{s}", .{out});
},
}
}
pub fn update(self: Repo, env: Env) !Commit {
const dir = try fs.dir_info(self.path);
if (!dir.exists or dir.empty) {
try self.clone(env);
} else {
var res = shell.exec(.{
.env = env,
.argv = &.{ "git", "fetch", "--quiet", "--depth=1", "origin", self.branch },
.cwd = self.path,
});
switch (res) {
.success => |out| env.dealloc(out),
.failure => |out| {
env.err("failed to fetch branch {s}: {s}\n", .{ self.branch, self.url });
fatal("{s}", .{out});
},
}
const branch_spec: fs.Path = .join(.{ "origin", self.branch });
res = shell.exec(.{
.env = env,
.argv = &.{ "git", "reset", "--hard", branch_spec.name() },
.cwd = self.path,
});
switch (res) {
.success => |out| env.dealloc(out),
.failure => |out| {
env.err("failed to reset branch {s}: {s}\n", .{ self.branch, self.path.name() });
fatal("{s}", .{out});
},
}
}
// We leak `out` intentionally here.
const out = self.must_run(env, &.{ "git", "show", "--no-patch", "--format=format:%H %at", self.branch });
const space = std.mem.indexOfScalar(u8, out, ' ') orelse {
fatal("unexpected output for 'git show'", .{});
};
return .{
.hash = out[0..space],
.timestamp = ts: {
var timestamp: u64 = 0;
for (out[space + 1 ..]) |c| {
if (c < '0' or c > '9') {
fatal("unexpected timestamp in 'git show'", .{});
}
timestamp *= 10;
timestamp += @intCast(c - '0');
}
break :ts timestamp;
},
};
}
fn must_run(self: Repo, env: Env, argv: []const []const u8) []const u8 {
const res = shell.exec(.{
.env = env,
.argv = argv,
.cwd = self.path,
});
switch (res) {
.success => |out| return out,
.failure => |out| {
var errmsg = out;
if (std.mem.indexOfScalar(u8, errmsg, '\n')) |eol| {
errmsg = errmsg[0..eol];
if (errmsg.len > 0 and errmsg[errmsg.len - 1] == '\r') {
errmsg = errmsg[0 .. errmsg.len - 1];
}
}
fatal("{s}", .{errmsg});
},
}
}
};
pub fn is_valid_branch_name(name: []const u8) bool {
var last_c: u8 = 0;
for (name) |c| {
switch (c) {
0...31 => return false,
':', '?', '[', '\\', '^', '~', ' ', '*' => return false,
'.' => if (last_c == '.') return false,
'{' => if (last_c == '@') return false,
else => {},
}
last_c = c;
}
return true;
}
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