better error chaining

Cargo.lock

@@ -366,6 +366,18 @@ dependencies = [
  "regex",
 ]
 
+[[package]]
+name = "filetime"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4e884668cd0c7480504233e951174ddc3b382f7c2666e3b7310b5c4e7b0c37f9"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "redox_syscall",
+ "windows-sys",
+]
+
 [[package]]
 name = "flate2"
 version = "1.0.25"
@@ -436,6 +448,12 @@ dependencies = [
  "url",
 ]
 
+[[package]]
+name = "glob"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2fabcfbdc87f4758337ca535fb41a6d701b65693ce38287d856d1674551ec9b"
+
 [[package]]
 name = "globset"
 version = "0.4.10"
@@ -582,12 +600,15 @@ version = "0.5.1"
 dependencies = [
  "chrono",
  "clap",
+ "flate2",
  "git2",
+ "glob",
  "open",
  "pulldown-cmark",
  "rayon",
  "serde",
  "syntect",
+ "tar",
  "tera",
  "toml",
 ]
@@ -1053,6 +1074,15 @@ dependencies = [
  "num_cpus",
 ]
 
+[[package]]
+name = "redox_syscall"
+version = "0.2.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
+dependencies = [
+ "bitflags",
+]
+
 [[package]]
 name = "regex"
 version = "1.7.0"
@@ -1215,6 +1245,17 @@ dependencies = [
  "yaml-rust",
 ]
 
+[[package]]
+name = "tar"
+version = "0.4.38"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4b55807c0344e1e6c04d7c965f5289c39a8d94ae23ed5c0b57aabac549f871c6"
+dependencies = [
+ "filetime",
+ "libc",
+ "xattr",
+]
+
 [[package]]
 name = "tera"
 version = "1.17.1"
@@ -1632,6 +1673,15 @@ version = "0.42.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f40009d85759725a34da6d89a94e63d7bdc50a862acf0dbc7c8e488f1edcb6f5"
 
+[[package]]
+name = "xattr"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d1526bbe5aaeb5eb06885f4d987bcdfa5e23187055de9b83fe00156a821fabc"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "xml-rs"
 version = "0.8.4"