add basic config file, use codemap_diagnostic for main errors

6 files changed, 285 insertions, 76 deletions

diff --git a/Cargo.lock b/Cargo.lock
index ad20d8e..f8735bd 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -18,7 +18,7 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.12"
+version = "1.0.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -26,23 +26,23 @@ name = "atty"
 version = "0.2.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "autocfg"
-version = "0.1.6"
+version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "bitflags"
-version = "1.2.0"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "cfg-if"
-version = "0.1.9"
+version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -50,9 +50,9 @@ name = "chrono"
 version = "0.4.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -62,7 +62,7 @@ version = "0.23.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "clang-sys 0.28.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -71,7 +71,7 @@ version = "0.28.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "glob 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -81,7 +81,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "atty 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "bitflags 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-width 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -125,7 +125,7 @@ name = "heck"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "unicode-segmentation 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-segmentation 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -133,7 +133,7 @@ name = "hermit-abi"
 version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -156,7 +156,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "libc"
-version = "0.2.62"
+version = "0.2.65"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -164,7 +164,7 @@ name = "log"
 version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -177,25 +177,25 @@ name = "num-integer"
 version = "0.1.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num-traits"
-version = "0.2.8"
+version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num_cpus"
-version = "1.11.0"
+version = "1.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "hermit-abi 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -203,9 +203,9 @@ name = "pandoc_types"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "serde 1.0.100 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.100 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -217,20 +217,23 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "poseidoc"
 version = "0.1.0"
 dependencies = [
- "anyhow 1.0.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "anyhow 1.0.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "clang 0.23.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "codemap 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "codemap-diagnostic 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "num_cpus 1.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num_cpus 1.11.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "pandoc_types 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "percent-encoding 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "pretty_env_logger 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
  "shell-words 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "structopt 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "thiserror 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "structopt 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "thiserror 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "threadpool 1.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "toml 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "xml-rs 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -249,14 +252,14 @@ name = "proc-macro-error"
 version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.3"
+version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -272,7 +275,7 @@ name = "quote"
 version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -298,32 +301,32 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "ryu"
-version = "1.0.0"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "serde"
-version = "1.0.100"
+version = "1.0.102"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "serde_derive"
-version = "1.0.100"
+version = "1.0.102"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "serde_json"
-version = "1.0.40"
+version = "1.0.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "itoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "ryu 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.100 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ryu 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -338,31 +341,31 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "structopt"
-version = "0.3.3"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "structopt-derive 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "structopt-derive 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "structopt-derive"
-version = "0.3.3"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "proc-macro-error 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "syn"
-version = "1.0.5"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -385,20 +388,20 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "1.0.1"
+version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "thiserror-impl 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "thiserror-impl 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.0"
+version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -414,7 +417,7 @@ name = "threadpool"
 version = "1.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num_cpus 1.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num_cpus 1.11.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -422,14 +425,22 @@ name = "time"
 version = "0.1.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
+name = "toml"
+version = "0.5.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "serde 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "unicode-segmentation"
-version = "1.3.0"
+version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -491,11 +502,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [metadata]
 "checksum aho-corasick 0.7.6 (registry+https://github.com/rust-lang/crates.io-index)" = "58fb5e95d83b38284460a5fda7d6470aa0b8844d283a0b614b8535e880800d2d"
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-"checksum anyhow 1.0.12 (registry+https://github.com/rust-lang/crates.io-index)" = "aaf594cde167a6a4e715d4c8c3a71eb07e6b2c48b28014f9425bc8f7d8bdec11"
+"checksum anyhow 1.0.19 (registry+https://github.com/rust-lang/crates.io-index)" = "57114fc2a6cc374bce195d3482057c846e706d252ff3604363449695684d7a0d"
 "checksum atty 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)" = "1803c647a3ec87095e7ae7acfca019e98de5ec9a7d01343f611cf3152ed71a90"
-"checksum autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "b671c8fb71b457dd4ae18c4ba1e59aa81793daacc361d82fcd410cef0d491875"
-"checksum bitflags 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8a606a02debe2813760609f57a64a2ffd27d9fdf5b2f133eaca0b248dd92cdd2"
-"checksum cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "b486ce3ccf7ffd79fdeb678eac06a9e6c09fc88d33836340becb8fffe87c5e33"
+"checksum autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "1d49d90015b3c36167a20fe2810c5cd875ad504b39cff3d4eae7977e6b7c1cb2"
+"checksum bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
+"checksum cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 "checksum chrono 0.4.9 (registry+https://github.com/rust-lang/crates.io-index)" = "e8493056968583b0193c1bb04d6f7684586f3726992d6c573261941a895dbd68"
 "checksum clang 0.23.0 (registry+https://github.com/rust-lang/crates.io-index)" = "edaa418fdc81a329f3c8258a4e8776f7d2c31682147c5bda1c5c37ab8e818114"
 "checksum clang-sys 0.28.1 (registry+https://github.com/rust-lang/crates.io-index)" = "81de550971c976f176130da4b2978d3b524eaa0fd9ac31f3ceb5ae1231fb4853"
@@ -509,39 +520,40 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum humantime 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "df004cfca50ef23c36850aaaa59ad52cc70d0e90243c3c7737a4dd32dc7a3c4f"
 "checksum itoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "501266b7edd0174f8530248f87f99c88fbe60ca4ef3dd486835b8d8d53136f7f"
 "checksum lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
-"checksum libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)" = "34fcd2c08d2f832f376f4173a231990fa5aef4e99fb569867318a227ef4c06ba"
+"checksum libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)" = "1a31a0627fdf1f6a39ec0dd577e101440b7db22672c0901fe00a9a6fbb5c24e8"
 "checksum log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)" = "14b6052be84e6b71ab17edffc2eeabf5c2c3ae1fdb464aae35ac50c67a44e1f7"
 "checksum memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "88579771288728879b57485cc7d6b07d648c9f0141eb955f8ab7f9d45394468e"
 "checksum num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)" = "b85e541ef8255f6cf42bbfe4ef361305c6c135d10919ecc26126c4e5ae94bc09"
-"checksum num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "6ba9a427cfca2be13aa6f6403b0b7e7368fe982bfa16fccc450ce74c46cd9b32"
-"checksum num_cpus 1.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "155394f924cdddf08149da25bfb932d226b4a593ca7468b08191ff6335941af5"
+"checksum num-traits 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)" = "443c53b3c3531dfcbfa499d8893944db78474ad7a1d87fa2d94d1a2231693ac6"
+"checksum num_cpus 1.11.1 (registry+https://github.com/rust-lang/crates.io-index)" = "76dac5ed2a876980778b8b85f75a71b6cbf0db0b1232ee12f826bccb00d09d72"
 "checksum pandoc_types 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "29869c4f0ed84c2514105047415ff220679d7dbe566982c32f60a5c330cb77ed"
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diff --git a/Cargo.toml b/Cargo.toml
index 17f23da..54e8670 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,9 +16,12 @@ num_cpus = "1"
 pandoc_types = "0.2"
 percent-encoding = "2"
 pretty_env_logger = "0.3"
+serde = "1"
+serde_derive = "1"
 serde_json = "1"
 shell-words = "0.1"
 structopt = "0.3"
 thiserror = "1"
 threadpool = "1"
+toml = "0.5"
 xml-rs = "0.8"
diff --git a/res/sample-markdown-project-1/poseidoc.toml b/res/sample-markdown-project-1/poseidoc.toml
new file mode 100644
index 0000000..fe24995
--- /dev/null
+++ b/res/sample-markdown-project-1/poseidoc.toml
@@ -0,0 +1 @@
+name = "Sample Markdown Project"
diff --git a/src/cli.rs b/src/cli.rs
index e106de7..0a883af 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -1,5 +1,9 @@
+use crate::config::Config;
+
 use structopt::StructOpt;
 
+use std::path::PathBuf;
+
 #[derive(Debug, Clone, StructOpt)]
 pub(crate) struct Cli {
     #[structopt(long, short, parse(from_occurrences))]
@@ -8,11 +12,27 @@ pub(crate) struct Cli {
     #[structopt(long, number_of_values = 1, parse(try_from_str = shell_words::split))]
     pub(crate) extra_arg: Vec<Vec<String>>,
 
+    #[structopt(long, short = "C", default_value = ".")]
+    pub(crate) directory: PathBuf,
+
     #[structopt(subcommand)]
     pub(crate) command: Command,
+
+    #[structopt(flatten)]
+    pub(crate) common_options: Config,
 }
 
 #[derive(Debug, Clone, StructOpt)]
 pub(crate) enum Command {
     Generate { file: String },
+    Config {
+        #[structopt(subcommand)]
+        command: ConfigCommand,
+    }
+}
+
+#[derive(Debug, Clone, StructOpt)]
+pub(crate) enum ConfigCommand {
+    Default,
+    Show,
 }
diff --git a/src/config.rs b/src/config.rs
new file mode 100644
index 0000000..4463479
--- /dev/null
+++ b/src/config.rs
@@ -0,0 +1,107 @@
+use anyhow::{anyhow, Context, Result};
+use codemap::CodeMap;
+use codemap_diagnostic::Diagnostic;
+use serde_derive::{Deserialize, Serialize};
+use structopt::StructOpt;
+use thiserror::Error;
+
+use std::path::{Path, PathBuf};
+use std::sync::Arc;
+
+pub(super) const DEFAULT_PROJECT_CONFIGURATION_FILE_NAME: &str = "poseidoc.toml";
+
+#[derive(Debug, Clone, StructOpt, Deserialize, Serialize)]
+#[structopt(rename_all = "kebab-case")]
+#[serde(rename_all = "kebab-case", default)]
+pub(crate) struct Config {
+    #[structopt(skip)]
+    pub(crate) name: String,
+    #[structopt(long, default_value = ".")]
+    pub(crate) compile_commands_location: PathBuf,
+    #[structopt(skip = vec![])]
+    pub(crate) extra_clang_args: Vec<String>,
+}
+
+impl Default for Config {
+    fn default() -> Self {
+        Config {
+            name: "My Project".into(),
+            compile_commands_location: PathBuf::from(r"."),
+            extra_clang_args: Vec::new(),
+        }
+    }
+}
+
+pub(super) fn load_config(location: impl AsRef<Path>, codemap: &mut CodeMap) -> Result<Config> {
+    let location = location.as_ref();
+
+    let final_path = if location.is_dir() {
+        location.join(DEFAULT_PROJECT_CONFIGURATION_FILE_NAME)
+    } else if !location.exists() {
+        return Err(anyhow!("File {:?} does not exists", location))
+            .with_context(|| format!("Failed to open project configuration: {:?}", location));
+    } else {
+        location.to_owned()
+    };
+
+    let config_str =
+        std::fs::read_to_string(&final_path).map_err(|err| ConfigLoadError::IoError {
+            file_name: final_path.clone(),
+            source: err,
+        })?;
+    Ok(
+        toml::from_str(&config_str).map_err(|err| ConfigLoadError::TomlDeserialzation {
+            file: codemap.add_file(final_path.to_string_lossy().into(), config_str),
+            source: err,
+        })?,
+    )
+}
+
+#[derive(Debug, Error)]
+#[error("Error loading project configuration")]
+pub(crate) enum ConfigLoadError {
+    #[error("Failed to read project configuration: {:?}", file_name)]
+    IoError {
+        file_name: PathBuf,
+        source: std::io::Error,
+    },
+    #[error("Failed to parse project configuration: {:?}", file.name())]
+    TomlDeserialzation {
+        file: Arc<codemap::File>,
+        source: toml::de::Error,
+    },
+}
+
+impl From<&ConfigLoadError> for Diagnostic {
+    fn from(err: &ConfigLoadError) -> Diagnostic {
+        use codemap_diagnostic::{Level, SpanLabel, SpanStyle};
+        use std::convert::TryInto;
+
+        let message = err.to_string();
+
+        let spans = match err {
+            ConfigLoadError::IoError { .. } => vec![],
+            ConfigLoadError::TomlDeserialzation { file, source, .. } => {
+                if let Some((line, col)) = source.line_col() {
+                    let line_span = file.line_span(line);
+                    let col = col.try_into().unwrap();
+                    let span = line_span.subspan(col, col);
+                    vec![SpanLabel {
+                        span,
+                        label: None,
+                        style: SpanStyle::Primary,
+                    }]
+                } else {
+                    vec![]
+                }
+            }
+        };
+
+        Diagnostic {
+            level: Level::Error,
+            message,
+            code: None,
+            spans,
+        }
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index e1d4752..503688e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,6 @@
 //mod doxygen;
 mod cli;
+mod config;
 mod entities;
 mod generator;
 mod pandoc;
@@ -8,14 +9,63 @@ mod parsing;
 #[macro_use]
 extern crate log;
 
-use cli::Command;
+use cli::{Command, ConfigCommand};
 use generator::generate;
 use parsing::parse_file;
 
-use anyhow::Result;
+use anyhow::{Context, Result};
+use codemap::CodeMap;
+use codemap_diagnostic::{Diagnostic, Emitter, Level};
 use structopt::StructOpt;
 
-fn main() -> Result<()> {
+fn into_diagnostic(err: &anyhow::Error) -> Diagnostic {
+    if let Some(err) = err.downcast_ref::<config::ConfigLoadError>() {
+        err.into()
+    } else {
+        Diagnostic {
+            level: Level::Error,
+            message: err.to_string(),
+            code: None,
+            spans: vec![],
+        }
+    }
+}
+
+fn main() {
+    let mut codemap = CodeMap::new();
+
+    match start(&mut codemap) {
+        Ok(()) => {}
+        Err(err) => {
+            let mut emitter =
+                Emitter::stderr(codemap_diagnostic::ColorConfig::Auto, Some(&codemap));
+
+            let mut diagnostics = Vec::new();
+            diagnostics.push(into_diagnostic(&err));
+
+            if let Some(mut source) = err.source() {
+                diagnostics.push(Diagnostic {
+                    level: Level::Note,
+                    message: format!("Caused by: {}", source),
+                    code: None,
+                    spans: vec![],
+                });
+                while let Some(source2) = source.source() {
+                    source = source2;
+                    diagnostics.push(Diagnostic {
+                        level: Level::Note,
+                        message: format!("Caused by: {}", source),
+                        code: None,
+                        spans: vec![],
+                    });
+                }
+            }
+            emitter.emit(&diagnostics);
+        }
+    }
+}
+
+fn start(codemap: &mut CodeMap) -> Result<()> {
     let cli = cli::Cli::from_args();
     pretty_env_logger::formatted_builder()
         .filter(
@@ -30,6 +80,9 @@ fn main() -> Result<()> {
         )
         .try_init()?;
 
+    std::env::set_current_dir(&cli.directory)
+        .with_context(|| format!("Cannot change current directory to: {:?}", cli.directory))?;
+
     match cli.command {
         Command::Generate { file } => {
             let extra_args = cli.extra_arg.iter().flatten().map(AsRef::as_ref).collect();
@@ -38,6 +91,19 @@ fn main() -> Result<()> {
             let base_output_dir = std::path::Path::new("doc");
             generate(&base_output_dir, manager)?;
         }
+        Command::Config {
+            command: ConfigCommand::Default,
+        } => {
+            print!("{}", toml::to_string_pretty(&config::Config::default())?);
+        }
+        Command::Config {
+            command: ConfigCommand::Show,
+        } => {
+            print!(
+                "{}",
+                toml::to_string_pretty(&config::load_config(".", codemap)?)?
+            );
+        }
     }
 
     Ok(())