Remove C dependencies (#95)

This change make gitql to use a pure go implemenation of git instead of libgit, it will allow us to give support to homebrew easily for example.

go.mod

@@ -6,10 +6,9 @@ require (
 	github.com/chzyer/logex v1.1.10 // indirect
 	github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e
 	github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1 // indirect
-	github.com/cloudson/git2go v0.0.0-20191006111621-d809ba5282bf
+	github.com/go-git/go-git/v5 v5.1.0
 	github.com/jessevdk/go-flags v1.4.0
 	github.com/mattn/go-runewidth v0.0.4 // indirect
 	github.com/olekukonko/tablewriter v0.0.1
 	github.com/pkg/errors v0.8.1
-	golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9 // indirect
 )

go.sum

@@ -1,18 +1,89 @@
+github.com/alcortesm/tgz v0.0.0-20161220082320-9c5fe88206d7 h1:uSoVVbwJiQipAclBbw+8quDsfcvFjOpI5iCf4p/cqCs=
+github.com/alcortesm/tgz v0.0.0-20161220082320-9c5fe88206d7/go.mod h1:6zEj6s6u/ghQa61ZWa/C2Aw3RkjiTBOix7dkqa1VLIs=
+github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239 h1:kFOfPq6dUM1hTo4JG6LR5AXSUEsOjtdm0kw0FtQtMJA=
+github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
+github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5 h1:0CwZNZbxp69SHPdPJAN/hZIm0C4OItdklCFmMRWYpio=
+github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5/go.mod h1:wHh0iHkYZB8zMSxRWpUBQtwG5a7fFgvEO+odwuTv2gs=
 github.com/chzyer/logex v1.1.10 h1:Swpa1K6QvQznwJRcfTfQJmTE72DqScAa40E+fbHEXEE=
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e h1:fY5BOSpyZCqRo5OhCuC+XN+r/bBCmeuuJtjz+bCNIf8=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1 h1:q763qf9huN11kDQavWsoZXJNW3xEE4JJyHa5Q25/sd8=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
-github.com/cloudson/git2go v0.0.0-20191006111621-d809ba5282bf h1:4ZRjBIIIzpcKadgdlZ/PrXL9Nzvzc+Ocgj7jkKyInco=
-github.com/cloudson/git2go v0.0.0-20191006111621-d809ba5282bf/go.mod h1:+2sIqmFkqG9ZMPRAOjp55Q3VTDQwpzQEtAymVW6vGWA=
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/emirpasic/gods v1.12.0 h1:QAUIPSaCu4G+POclxeqb3F+WPpdKqFGlw36+yOzGlrg=
+github.com/emirpasic/gods v1.12.0/go.mod h1:YfzfFFoVP/catgzJb4IKIqXjX78Ha8FMSDh3ymbK86o=
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+github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568/go.mod h1:xEzjJPgXI435gkrCt3MPfRiAkVrwSbHsst4LCFVfpJc=
+github.com/gliderlabs/ssh v0.2.2 h1:6zsha5zo/TWhRhwqCD3+EarCAgZ2yN28ipRnGPnwkI0=
+github.com/gliderlabs/ssh v0.2.2/go.mod h1:U7qILu1NlMHj9FlMhZLlkCdDnU1DBEAqr0aevW3Awn0=
+github.com/go-git/gcfg v1.5.0 h1:Q5ViNfGF8zFgyJWPqYwA7qGFoMTEiBmdlkcfRmpIMa4=
+github.com/go-git/gcfg v1.5.0/go.mod h1:5m20vg6GwYabIxaOonVkTdrILxQMpEShl1xiMF4ua+E=
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+github.com/go-git/go-billy/v5 v5.0.0/go.mod h1:pmpqyWchKfYfrkb/UVH4otLvyi/5gJlGI4Hb3ZqZ3W0=
+github.com/go-git/go-git-fixtures/v4 v4.0.1 h1:q+IFMfLx200Q3scvt2hN79JsEzy4AmBTp/pqnefH+Bc=
+github.com/go-git/go-git-fixtures/v4 v4.0.1/go.mod h1:m+ICp2rF3jDhFgEZ/8yziagdT1C+ZpZcrJjappBCDSw=
+github.com/go-git/go-git/v5 v5.1.0 h1:HxJn9g/E7eYvKW3Fm7Jt4ee8LXfPOm/H1cdDu8vEssk=
+github.com/go-git/go-git/v5 v5.1.0/go.mod h1:ZKfuPUoY1ZqIG4QG9BDBh3G4gLM5zvPuSJAozQrZuyM=
+github.com/google/go-cmp v0.3.0 h1:crn/baboCvb5fXaQ0IJ1SGTsTVrWpDsCWC8EGETZijY=
+github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/imdario/mergo v0.3.9 h1:UauaLniWCFHWd+Jp9oCEkTBj8VO/9DKg3PV3VCNMDIg=
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 github.com/jessevdk/go-flags v1.4.0 h1:4IU2WS7AumrZ/40jfhf4QVDMsQwqA7VEHozFRrGARJA=
 github.com/jessevdk/go-flags v1.4.0/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
+github.com/kevinburke/ssh_config v0.0.0-20190725054713-01f96b0aa0cd h1:Coekwdh0v2wtGp9Gmz1Ze3eVRAWJMLokvN3QjdzCHLY=
+github.com/kevinburke/ssh_config v0.0.0-20190725054713-01f96b0aa0cd/go.mod h1:CT57kijsi8u/K/BOFA39wgDQJ9CxiF4nAY/ojJ6r6mM=
+github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
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 github.com/mattn/go-runewidth v0.0.4 h1:2BvfKmzob6Bmd4YsL0zygOqfdFnK7GR4QL06Do4/p7Y=
 github.com/mattn/go-runewidth v0.0.4/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzpuz5H//U1FU=
+github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
+github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
+github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e h1:fD57ERR4JtEqsWbfPhv4DMiApHyliiK5xCTNVSPiaAs=
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 github.com/olekukonko/tablewriter v0.0.1 h1:b3iUnf1v+ppJiOfNX4yxxqfWKMQPZR5yoh8urCTFX88=
 github.com/olekukonko/tablewriter v0.0.1/go.mod h1:vsDQFd/mU46D+Z4whnwzcISnGGzXWMclvtLoiIKAKIo=
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
-golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9 h1:L2auWcuQIvxz9xSEqzESnV/QN/gNRXNApHi3fYwl2w0=
-golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
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+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20200302210943-78000ba7a073 h1:xMPOj6Pz6UipU1wXLkrtqpHbR0AVFnyPEQq/wRWz9lM=
+golang.org/x/crypto v0.0.0-20200302210943-78000ba7a073/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
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+golang.org/x/net v0.0.0-20200301022130-244492dfa37a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8XK9/i0At2xKjWk4p6zsU=
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+gopkg.in/warnings.v0 v0.1.2 h1:wFXVbFY8DY5/xOe1ECiWdKCzZlxgshcYVNkBHstARME=
+gopkg.in/warnings.v0 v0.1.2/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.4 h1:/eiJrUcujPVeJ3xlSWaiNi3uSVmDGBK1pDHUHAnao1I=
+gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

lexical/tokens.go

@@ -60,8 +60,8 @@ func allocMapTokenNames() {
 			T_IN:               "T_IN",
 			T_EOF:              "T_EOF",
 			T_ASC:              "T_ASC",
-			T_NOT: 		           "T_NOT",
-			T_COUNT:   "T_COUNT",
+			T_NOT:              "T_NOT",
+			T_COUNT:            "T_COUNT",
 		}
 	}
 }

parser/ast.go

@@ -58,7 +58,7 @@ type NodeAdapterBinToConst struct {
 type NodeIn struct {
 	leftValue  NodeExpr
 	rightValue NodeExpr
-	Not 	   bool
+	Not        bool
 }
 
 type NodeEqual struct {
@@ -75,7 +75,7 @@ type NodeLike struct {
 	leftValue  NodeExpr
 	rightValue NodeExpr
 	Pattern    *regexp.Regexp
-	Not 	   bool
+	Not        bool
 }
 
 type NodeGreater struct {

parser/parser.go

@@ -165,7 +165,7 @@ func gTableParams() ([]string, error) {
 		}
 		look_ahead = token
 		return []string{"*"}, nil
-	} else	if look_ahead == lexical.T_COUNT {
+	} else if look_ahead == lexical.T_COUNT {
 		result, err := gCount()
 		return result, err
 	}

parser/parser_test.go

@@ -73,7 +73,6 @@ func TestUsingCount(t *testing.T) {
 	}
 }
 
-
 func TestUsingOneFieldName(t *testing.T) {
 	New("select name from files")
 
@@ -148,7 +147,6 @@ func TestErrorWithMalformedCount(t *testing.T) {
 	}
 }
 
-
 func TestErrorWithInvalidRootNode(t *testing.T) {
 	New("name from files")
 
@@ -294,8 +292,6 @@ func TestWhereWithIn(t *testing.T) {
 		t.Errorf("RValue should be 'message'")
 	}
 
-
-
 }
 
 func TestWhereWithNotIn(t *testing.T) {

runtime/commits.go

@@ -2,19 +2,20 @@ package runtime
 
 import (
 	"fmt"
-	"strconv"
 	"log"
+	"strconv"
 	"strings"
 
-	"github.com/cloudson/git2go"
 	"github.com/cloudson/gitql/parser"
 	"github.com/cloudson/gitql/utilities"
+	"github.com/go-git/go-git/v5/plumbing/object"
 )
 
 func walkCommits(n *parser.NodeProgram, visitor *RuntimeVisitor) (*TableData, error) {
-	builder.walk, _ = repo.Walk()
-	builder.walk.PushHead()
-	builder.walk.Sorting(git.SortTime)
+	iter, err := repo.CommitObjects()
+	if err != nil {
+		return nil, err
+	}
 
 	s := n.Child.(*parser.NodeSelect)
 	where := s.Where
@@ -34,37 +35,39 @@ func walkCommits(n *parser.NodeProgram, visitor *RuntimeVisitor) (*TableData, er
 			fields = append(fields, s.Order.Field)
 		}
 	}
-	fn := func(object *git.Commit) bool {
-		builder.setCommit(object)
+
+	iter.ForEach(func(commit *object.Commit) error {
+		builder.setCommit(commit)
 		boolRegister = true
 		visitor.VisitExpr(where)
+
 		if boolRegister {
 			if !s.Count {
 				newRow := make(tableRow)
 				for _, f := range fields {
-					newRow[f] = metadataCommit(f, object)
+					newRow[f] = metadataCommit(f, commit)
 				}
+
 				rows = append(rows, newRow)
 			}
 			counter = counter + 1
 		}
+
 		if !usingOrder && !s.Count && counter > s.Limit {
-			return false
+			return fmt.Errorf("limit") // stop iteration
 		}
-		return true
-	}
 
-	err := builder.walk.Iterate(fn)
-	if err != nil {
-		fmt.Printf(err.Error())
-	}
+		return nil
+	})
+
 	if s.Count {
 		newRow := make(tableRow)
 		// counter was started from 1!
-		newRow[COUNT_FIELD_NAME] = strconv.Itoa(counter-1)
+		newRow[COUNT_FIELD_NAME] = strconv.Itoa(counter - 1)
 		counter = 2
 		rows = append(rows, newRow)
 	}
+
 	rowsSliced := rows[len(rows)-counter+1:]
 	rowsSliced, err = orderTable(rowsSliced, s.Order)
 	if err != nil {
@@ -75,13 +78,15 @@ func walkCommits(n *parser.NodeProgram, visitor *RuntimeVisitor) (*TableData, er
 		counter = s.Limit
 		rowsSliced = rowsSliced[0:counter]
 	}
+
 	tableData := new(TableData)
 	tableData.rows = rowsSliced
 	tableData.fields = resultFields
+
 	return tableData, nil
 }
 
-func metadataCommit(identifier string, object *git.Commit) string {
+func metadataCommit(identifier string, commit *object.Commit) string {
 	key := ""
 	for key, _ = range builder.tables {
 		break
@@ -91,24 +96,26 @@ func metadataCommit(identifier string, object *git.Commit) string {
 	if err != nil {
 		log.Fatalln(err)
 	}
+
 	switch identifier {
 	case "hash":
-		return object.Id().String()
+		return commit.ID().String()
 	case "author":
-		return object.Author().Name
+		return commit.Author.Name
 	case "author_email":
-		return object.Author().Email
+		return commit.Author.Email
 	case "committer":
-		return object.Committer().Name
+		return commit.Committer.Name
 	case "committer_email":
-		return object.Committer().Email
+		return commit.Committer.Email
 	case "date":
-		return object.Committer().When.Format(parser.Time_YMDHIS)
+		//return object.Committer().When.Format()
+		return commit.Author.When.Format(parser.Time_YMDHIS)
 	case "full_message":
-		return object.Message()
+		return commit.Message
 	case "message":
 		// return first line of a commit message
-		message := object.Message()
+		message := commit.Message
 		r := []rune("\n")
 		idx := strings.IndexRune(message, r[0])
 		if idx != -1 {