mirror of
https://github.com/spf13/cobra
synced 2024-11-24 14:47:12 +00:00
First try at better zsh completions:
A very basic POC. Need to refactor to generate completion structure before passing to the template to avoid repeated computations. What works: * Real zsh completion (not built on bash) * Basic flags (with long flag and optional shorthand) * Basic filename completion indication (not with file extensions though) What's missing: * File extensions to filename completions * Positional args * Do we require handling only short flags?
This commit is contained in:
Haim Ashkenazi
Steve Francia
parent
67fc4837d2
commit
7e2436b79d
5 changed files with 477 additions and 143 deletions
132
Gopkg.lock
generated
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132
Gopkg.lock
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@ -0,0 +1,132 @@
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# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
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[[projects]]
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name = "github.com/cpuguy83/go-md2man"
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packages = ["md2man"]
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revision = "20f5889cbdc3c73dbd2862796665e7c465ade7d1"
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version = "v1.0.8"
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[[projects]]
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name = "github.com/fsnotify/fsnotify"
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packages = ["."]
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revision = "c2828203cd70a50dcccfb2761f8b1f8ceef9a8e9"
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version = "v1.4.7"
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[[projects]]
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branch = "master"
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name = "github.com/hashicorp/hcl"
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packages = [
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".",
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"hcl/ast",
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"hcl/parser",
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"hcl/printer",
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"hcl/scanner",
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"hcl/strconv",
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"hcl/token",
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"json/parser",
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"json/scanner",
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"json/token"
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]
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revision = "23c074d0eceb2b8a5bfdbb271ab780cde70f05a8"
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[[projects]]
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name = "github.com/inconshreveable/mousetrap"
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packages = ["."]
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revision = "76626ae9c91c4f2a10f34cad8ce83ea42c93bb75"
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version = "v1.0"
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[[projects]]
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name = "github.com/magiconair/properties"
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packages = ["."]
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revision = "c3beff4c2358b44d0493c7dda585e7db7ff28ae6"
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version = "v1.7.6"
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[[projects]]
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branch = "master"
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name = "github.com/mitchellh/go-homedir"
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packages = ["."]
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revision = "b8bc1bf767474819792c23f32d8286a45736f1c6"
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[[projects]]
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branch = "master"
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name = "github.com/mitchellh/mapstructure"
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packages = ["."]
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revision = "a4e142e9c047c904fa2f1e144d9a84e6133024bc"
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[[projects]]
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name = "github.com/pelletier/go-toml"
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packages = ["."]
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revision = "acdc4509485b587f5e675510c4f2c63e90ff68a8"
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version = "v1.1.0"
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[[projects]]
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name = "github.com/russross/blackfriday"
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packages = ["."]
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revision = "4048872b16cc0fc2c5fd9eacf0ed2c2fedaa0c8c"
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version = "v1.5"
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[[projects]]
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name = "github.com/spf13/afero"
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packages = [
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".",
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"mem"
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]
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revision = "bb8f1927f2a9d3ab41c9340aa034f6b803f4359c"
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version = "v1.0.2"
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[[projects]]
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name = "github.com/spf13/cast"
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packages = ["."]
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revision = "8965335b8c7107321228e3e3702cab9832751bac"
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version = "v1.2.0"
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[[projects]]
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branch = "master"
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name = "github.com/spf13/jwalterweatherman"
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packages = ["."]
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revision = "7c0cea34c8ece3fbeb2b27ab9b59511d360fb394"
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[[projects]]
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branch = "master"
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name = "github.com/spf13/pflag"
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packages = ["."]
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revision = "6a877ebacf28c5fc79846f4fcd380a5d9872b997"
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[[projects]]
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branch = "master"
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name = "github.com/spf13/viper"
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packages = ["."]
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revision = "aafc9e6bc7b7bb53ddaa75a5ef49a17d6e654be5"
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[[projects]]
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branch = "master"
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name = "golang.org/x/sys"
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packages = ["unix"]
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revision = "37707fdb30a5b38865cfb95e5aab41707daec7fd"
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[[projects]]
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branch = "master"
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name = "golang.org/x/text"
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packages = [
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"internal/gen",
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"internal/triegen",
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"internal/ucd",
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"transform",
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"unicode/cldr",
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"unicode/norm"
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]
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revision = "4e4a3210bb54bb31f6ab2cdca2edcc0b50c420c1"
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[[projects]]
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branch = "v2"
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name = "gopkg.in/yaml.v2"
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packages = ["."]
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revision = "d670f9405373e636a5a2765eea47fac0c9bc91a4"
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[solve-meta]
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analyzer-name = "dep"
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analyzer-version = 1
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inputs-digest = "d7aecc8ee6a8b343ebf8c2539348464f2566a18dfc511cd374b2cd76bebb1c6d"
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solver-name = "gps-cdcl"
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solver-version = 1
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54
Gopkg.toml
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54
Gopkg.toml
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@ -0,0 +1,54 @@
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# Gopkg.toml example
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#
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# Refer to https://github.com/golang/dep/blob/master/docs/Gopkg.toml.md
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# for detailed Gopkg.toml documentation.
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#
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# required = ["github.com/user/thing/cmd/thing"]
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# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
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#
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# [[constraint]]
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# name = "github.com/user/project"
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# version = "1.0.0"
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#
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# [[constraint]]
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# name = "github.com/user/project2"
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# branch = "dev"
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# source = "github.com/myfork/project2"
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#
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# [[override]]
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# name = "github.com/x/y"
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# version = "2.4.0"
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#
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# [prune]
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# non-go = false
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# go-tests = true
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# unused-packages = true
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[[constraint]]
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name = "github.com/cpuguy83/go-md2man"
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version = "1.0.8"
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[[constraint]]
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name = "github.com/inconshreveable/mousetrap"
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version = "1.0.0"
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[[constraint]]
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branch = "master"
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name = "github.com/mitchellh/go-homedir"
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[[constraint]]
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name = "github.com/spf13/pflag"
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branch = "master"
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[[constraint]]
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name = "github.com/spf13/viper"
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branch = "master"
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[[constraint]]
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branch = "v2"
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name = "gopkg.in/yaml.v2"
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[prune]
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go-tests = true
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unused-packages = true
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@ -1,11 +1,82 @@
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package cobra
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import (
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"bytes"
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"fmt"
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"io"
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"os"
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"strings"
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"text/template"
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"github.com/spf13/pflag"
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)
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var (
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funcMap = template.FuncMap{
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"constructPath": constructPath,
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"subCmdList": subCmdList,
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"extractFlags": extractFlags,
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"simpleFlag": simpleFlag,
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}
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zshCompletionText = `
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{{/* for pflag.Flag (specifically annotations) */}}
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{{define "flagAnnotations" -}}
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{{with index .Annotations "cobra_annotation_bash_completion_filename_extensions"}}:filename:_files{{end}}
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{{- end}}
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{{/* for pflag.Flag with short and long options */}}
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{{define "complexFlag" -}}
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"(-{{.Shorthand}} --{{.Name}})"{-{{.Shorthand}},--{{.Name}}}"[{{.Usage}}]{{template "flagAnnotations" .}}"
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{{- end}}
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{{/* for pflag.Flag with either short or long options */}}
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{{define "simpleFlag" -}}
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"{{with .Name}}--{{.}}{{else}}-{{.Shorthand}}{{end}}[{{.Usage}}]{{template "flagAnnotations" .}}"
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{{- end}}
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{{/* should accept Command (that contains subcommands) as parameter */}}
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{{define "argumentsC" -}}
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function {{constructPath .}} {
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local line
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_arguments -C \
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{{range extractFlags . -}}
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{{" "}}{{if simpleFlag .}}{{template "simpleFlag" .}}{{else}}{{template "complexFlag" .}}{{end}} \
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{{end}} "1: :({{subCmdList .}})" \
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"*::arg:->args"
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case $line[1] in {{- range .Commands}}
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{{.Use}})
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{{constructPath .}}
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;;
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{{end}} esac
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}
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{{range .Commands}}
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{{template "selectCmdTemplate" .}}
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{{- end}}
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{{- end}}
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{{/* should accept Command without subcommands as parameter */}}
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{{define "arguments" -}}
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function {{constructPath .}} {
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{{with extractFlags . -}}
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{{ " _arguments" -}}
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{{range .}} \
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{{if simpleFlag .}}{{template "simpleFlag" .}}{{else}}{{template "complexFlag" .}}{{end -}}
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{{end}}
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{{end -}}
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}
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{{- end}}
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{{define "selectCmdTemplate" -}}
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{{if .Commands}}{{template "argumentsC" .}}{{else}}{{template "arguments" .}}{{end}}
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{{- end}}
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{{define "Main" -}}
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#compdef _{{.Use}} {{.Use}}
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{{template "selectCmdTemplate" .}}
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{{end}}
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`
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)
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// GenZshCompletionFile generates zsh completion file.
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@ -21,106 +92,56 @@ func (c *Command) GenZshCompletionFile(filename string) error {
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// GenZshCompletion generates a zsh completion file and writes to the passed writer.
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func (c *Command) GenZshCompletion(w io.Writer) error {
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buf := new(bytes.Buffer)
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writeHeader(buf, c)
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maxDepth := maxDepth(c)
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writeLevelMapping(buf, maxDepth)
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writeLevelCases(buf, maxDepth, c)
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_, err := buf.WriteTo(w)
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return err
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tmpl, err := template.New("Main").Funcs(funcMap).Parse(zshCompletionText)
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if err != nil {
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return fmt.Errorf("error creating zsh completion template: %v", err)
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}
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return tmpl.Execute(w, c)
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}
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func writeHeader(w io.Writer, cmd *Command) {
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fmt.Fprintf(w, "#compdef %s\n\n", cmd.Name())
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func constructPath(c *Command) string {
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var path []string
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tmpCmd := c
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path = append(path, tmpCmd.Use)
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for {
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if !tmpCmd.HasParent() {
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break
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}
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tmpCmd = tmpCmd.Parent()
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path = append(path, tmpCmd.Use)
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}
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// reverse path
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for left, right := 0, len(path)-1; left < right; left, right = left+1, right-1 {
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path[left], path[right] = path[right], path[left]
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}
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return "_" + strings.Join(path, "_")
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}
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func maxDepth(c *Command) int {
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if len(c.Commands()) == 0 {
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return 0
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// subCmdList returns a space separated list of subcommands names
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func subCmdList(c *Command) string {
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var subCmds []string
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for _, cmd := range c.Commands() {
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subCmds = append(subCmds, cmd.Use)
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}
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maxDepthSub := 0
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for _, s := range c.Commands() {
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subDepth := maxDepth(s)
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if subDepth > maxDepthSub {
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maxDepthSub = subDepth
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}
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}
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return 1 + maxDepthSub
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return strings.Join(subCmds, " ")
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}
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func writeLevelMapping(w io.Writer, numLevels int) {
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fmt.Fprintln(w, `_arguments \`)
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for i := 1; i <= numLevels; i++ {
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fmt.Fprintf(w, ` '%d: :->level%d' \`, i, i)
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fmt.Fprintln(w)
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}
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fmt.Fprintf(w, ` '%d: :%s'`, numLevels+1, "_files")
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fmt.Fprintln(w)
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func extractFlags(c *Command) []*pflag.Flag {
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var flags []*pflag.Flag
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c.LocalFlags().VisitAll(func(f *pflag.Flag) {
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flags = append(flags, f)
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})
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c.InheritedFlags().VisitAll(func(f *pflag.Flag) {
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flags = append(flags, f)
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})
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return flags
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}
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func writeLevelCases(w io.Writer, maxDepth int, root *Command) {
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fmt.Fprintln(w, "case $state in")
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defer fmt.Fprintln(w, "esac")
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for i := 1; i <= maxDepth; i++ {
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fmt.Fprintf(w, " level%d)\n", i)
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writeLevel(w, root, i)
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fmt.Fprintln(w, " ;;")
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}
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fmt.Fprintln(w, " *)")
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fmt.Fprintln(w, " _arguments '*: :_files'")
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fmt.Fprintln(w, " ;;")
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}
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func writeLevel(w io.Writer, root *Command, i int) {
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fmt.Fprintf(w, " case $words[%d] in\n", i)
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defer fmt.Fprintln(w, " esac")
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|
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commands := filterByLevel(root, i)
|
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byParent := groupByParent(commands)
|
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|
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for p, c := range byParent {
|
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names := names(c)
|
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fmt.Fprintf(w, " %s)\n", p)
|
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fmt.Fprintf(w, " _arguments '%d: :(%s)'\n", i, strings.Join(names, " "))
|
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fmt.Fprintln(w, " ;;")
|
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}
|
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fmt.Fprintln(w, " *)")
|
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fmt.Fprintln(w, " _arguments '*: :_files'")
|
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fmt.Fprintln(w, " ;;")
|
||||
|
||||
}
|
||||
|
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func filterByLevel(c *Command, l int) []*Command {
|
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cs := make([]*Command, 0)
|
||||
if l == 0 {
|
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cs = append(cs, c)
|
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return cs
|
||||
}
|
||||
for _, s := range c.Commands() {
|
||||
cs = append(cs, filterByLevel(s, l-1)...)
|
||||
}
|
||||
return cs
|
||||
}
|
||||
|
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func groupByParent(commands []*Command) map[string][]*Command {
|
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m := make(map[string][]*Command)
|
||||
for _, c := range commands {
|
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parent := c.Parent()
|
||||
if parent == nil {
|
||||
continue
|
||||
}
|
||||
m[parent.Name()] = append(m[parent.Name()], c)
|
||||
}
|
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return m
|
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}
|
||||
|
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func names(commands []*Command) []string {
|
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ns := make([]string, len(commands))
|
||||
for i, c := range commands {
|
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ns[i] = c.Name()
|
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}
|
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return ns
|
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func simpleFlag(p *pflag.Flag) bool {
|
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return p.Name == "" || p.Shorthand == ""
|
||||
}
|
||||
|
|
|
|||
|
|
@ -2,74 +2,92 @@ package cobra
|
|||
|
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import (
|
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"bytes"
|
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"strings"
|
||||
"regexp"
|
||||
"testing"
|
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)
|
||||
|
||||
func TestZshCompletion(t *testing.T) {
|
||||
func TestGenZshCompletion(t *testing.T) {
|
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var debug bool
|
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var option string
|
||||
|
||||
tcs := []struct {
|
||||
name string
|
||||
root *Command
|
||||
expectedExpressions []string
|
||||
}{
|
||||
{
|
||||
name: "trivial",
|
||||
root: &Command{Use: "trivialapp"},
|
||||
expectedExpressions: []string{"#compdef trivial"},
|
||||
},
|
||||
{
|
||||
name: "linear",
|
||||
name: "simple command",
|
||||
root: func() *Command {
|
||||
r := &Command{Use: "linear"}
|
||||
|
||||
sub1 := &Command{Use: "sub1"}
|
||||
r.AddCommand(sub1)
|
||||
|
||||
sub2 := &Command{Use: "sub2"}
|
||||
sub1.AddCommand(sub2)
|
||||
|
||||
sub3 := &Command{Use: "sub3"}
|
||||
sub2.AddCommand(sub3)
|
||||
r := &Command{
|
||||
Use: "mycommand",
|
||||
Long: "My Command long description",
|
||||
}
|
||||
r.Flags().BoolVar(&debug, "debug", debug, "description")
|
||||
return r
|
||||
}(),
|
||||
expectedExpressions: []string{"sub1", "sub2", "sub3"},
|
||||
expectedExpressions: []string{
|
||||
`function _mycommand {\s+_arguments \\\s+"--debug\[description\]"\s+}`,
|
||||
"#compdef _mycommand mycommand",
|
||||
},
|
||||
},
|
||||
{
|
||||
name: "flat",
|
||||
name: "flags with both long and short flags",
|
||||
root: func() *Command {
|
||||
r := &Command{Use: "flat"}
|
||||
r.AddCommand(&Command{Use: "c1"})
|
||||
r.AddCommand(&Command{Use: "c2"})
|
||||
r := &Command{
|
||||
Use: "testcmd",
|
||||
Long: "long description",
|
||||
}
|
||||
r.Flags().BoolVarP(&debug, "debug", "d", debug, "debug description")
|
||||
return r
|
||||
}(),
|
||||
expectedExpressions: []string{"(c1 c2)"},
|
||||
expectedExpressions: []string{
|
||||
`"\(-d --debug\)"{-d,--debug}"\[debug description\]"`,
|
||||
},
|
||||
},
|
||||
{
|
||||
name: "tree",
|
||||
name: "command with subcommands",
|
||||
root: func() *Command {
|
||||
r := &Command{Use: "tree"}
|
||||
|
||||
sub1 := &Command{Use: "sub1"}
|
||||
r.AddCommand(sub1)
|
||||
|
||||
sub11 := &Command{Use: "sub11"}
|
||||
sub12 := &Command{Use: "sub12"}
|
||||
|
||||
sub1.AddCommand(sub11)
|
||||
sub1.AddCommand(sub12)
|
||||
|
||||
sub2 := &Command{Use: "sub2"}
|
||||
r.AddCommand(sub2)
|
||||
|
||||
sub21 := &Command{Use: "sub21"}
|
||||
sub22 := &Command{Use: "sub22"}
|
||||
|
||||
sub2.AddCommand(sub21)
|
||||
sub2.AddCommand(sub22)
|
||||
|
||||
r := &Command{
|
||||
Use: "rootcmd",
|
||||
Long: "Long rootcmd description",
|
||||
}
|
||||
d := &Command{
|
||||
Use: "subcmd1",
|
||||
Short: "Subcmd1 short descrition",
|
||||
}
|
||||
e := &Command{
|
||||
Use: "subcmd2",
|
||||
Long: "Subcmd2 short description",
|
||||
}
|
||||
r.PersistentFlags().BoolVar(&debug, "debug", debug, "description")
|
||||
d.Flags().StringVarP(&option, "option", "o", option, "option description")
|
||||
r.AddCommand(d, e)
|
||||
return r
|
||||
}(),
|
||||
expectedExpressions: []string{"(sub11 sub12)", "(sub21 sub22)"},
|
||||
expectedExpressions: []string{
|
||||
`\\\n\s+"1: :\(subcmd1 subcmd2\)" \\\n`,
|
||||
`_arguments \\\n.*"--debug\[description]"`,
|
||||
`_arguments -C \\\n.*"--debug\[description]"`,
|
||||
`function _rootcmd_subcmd1 {`,
|
||||
`function _rootcmd_subcmd1 {`,
|
||||
`_arguments \\\n.*"\(-o --option\)"{-o,--option}"\[option description]" \\\n`,
|
||||
},
|
||||
},
|
||||
{
|
||||
name: "filename completion",
|
||||
root: func() *Command {
|
||||
var file string
|
||||
r := &Command{
|
||||
Use: "mycmd",
|
||||
Short: "my command short description",
|
||||
}
|
||||
r.Flags().StringVarP(&file, "config", "c", file, "config file")
|
||||
r.MarkFlagFilename("config", "ext")
|
||||
return r
|
||||
}(),
|
||||
expectedExpressions: []string{
|
||||
`\n +"\(-c --config\)"{-c,--config}"\[config file]:filename:_files"`,
|
||||
},
|
||||
},
|
||||
}
|
||||
|
||||
|
|
@ -77,13 +95,66 @@ func TestZshCompletion(t *testing.T) {
|
|||
t.Run(tc.name, func(t *testing.T) {
|
||||
buf := new(bytes.Buffer)
|
||||
tc.root.GenZshCompletion(buf)
|
||||
output := buf.String()
|
||||
output := buf.Bytes()
|
||||
|
||||
for _, expectedExpression := range tc.expectedExpressions {
|
||||
if !strings.Contains(output, expectedExpression) {
|
||||
t.Errorf("Expected completion to contain %q somewhere; got %q", expectedExpression, output)
|
||||
for _, expr := range tc.expectedExpressions {
|
||||
rgx, err := regexp.Compile(expr)
|
||||
if err != nil {
|
||||
t.Errorf("error compiling expression (%s): %v", expr, err)
|
||||
}
|
||||
if !rgx.Match(output) {
|
||||
t.Errorf("expeced completion (%s) to match '%s'", buf.String(), expr)
|
||||
}
|
||||
}
|
||||
})
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
func BenchmarkConstructPath(b *testing.B) {
|
||||
c := &Command{
|
||||
Use: "main",
|
||||
Long: "main long description which is very long",
|
||||
Short: "main short description",
|
||||
}
|
||||
d := &Command{
|
||||
Use: "hello",
|
||||
}
|
||||
e := &Command{
|
||||
Use: "world",
|
||||
}
|
||||
c.AddCommand(d)
|
||||
d.AddCommand(e)
|
||||
for i := 0; i < b.N; i++ {
|
||||
res := constructPath(e)
|
||||
if res != "_main_hello_world" {
|
||||
b.Errorf("expeced path to be '_main_hello_world', got %s", res)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestExtractFlags(t *testing.T) {
|
||||
var debug, cmdc, cmdd bool
|
||||
c := &Command{
|
||||
Use: "cmdC",
|
||||
Long: "Command C",
|
||||
}
|
||||
c.PersistentFlags().BoolVarP(&debug, "debug", "d", debug, "debug mode")
|
||||
c.Flags().BoolVar(&cmdc, "cmd-c", cmdc, "Command C")
|
||||
d := &Command{
|
||||
Use: "CmdD",
|
||||
Long: "Command D",
|
||||
}
|
||||
d.Flags().BoolVar(&cmdd, "cmd-d", cmdd, "Command D")
|
||||
c.AddCommand(d)
|
||||
|
||||
resC := extractFlags(c)
|
||||
resD := extractFlags(d)
|
||||
|
||||
if len(resC) != 2 {
|
||||
t.Errorf("expected Command C to return 2 flags, got %d", len(resC))
|
||||
}
|
||||
if len(resD) != 2 {
|
||||
t.Errorf("expected Command D to return 2 flags, got %d", len(resD))
|
||||
}
|
||||
}
|
||||
|
|
|
|||
56
zsh_template.tmpl
Normal file
56
zsh_template.tmpl
Normal file
|
|
@ -0,0 +1,56 @@
|
|||
{{define "complexFlag"}}{{ /* for pflag.Flag with short and long options */ -}}
|
||||
"(-{{.Shorthand}} --{{.Name}})"\{-{{.Shorthand}}, --{{.Name}}\}[{{.Usage}}]
|
||||
{{- end}}
|
||||
|
||||
{{define "simpleFlag"}}{{ /* for pflag.Flag with either short or long options */ -}}
|
||||
"{{with .Name}}-{{.}}{{else}}--{{.Shorthand}}{{end}}[{{.Usage}}]"
|
||||
{{- end}}
|
||||
|
||||
{{define "argumentsC"}}
|
||||
{{- /* should accept Command (that contains subcommands) as parameter */ -}}
|
||||
function {{constructPath .}} {
|
||||
local line
|
||||
|
||||
_arguments -C \
|
||||
{{range extractFlags . -}}
|
||||
{{if simpleFlag .}}{{template "simpleFlag" .}}{{else}}{{template "complexFlag" .}}{{end}} \
|
||||
{{end -}}
|
||||
"1: :({{subCmdList .}})" \
|
||||
"*:arg:->args"
|
||||
|
||||
case $line[1] in
|
||||
{{range .Commands -}}
|
||||
{{.Use}})
|
||||
{{constructPath .}}
|
||||
;;
|
||||
{{end -}}
|
||||
esac
|
||||
}
|
||||
{{range .Commands -}}
|
||||
|
||||
{{template "selectCmdTemplate" .}}
|
||||
{{end -}}
|
||||
{{end}}
|
||||
|
||||
{{define "arguments"}}
|
||||
function {{constructPath .}} {
|
||||
{{- /* should accept Command without subcommands as parameter */ -}}
|
||||
{{with extractFlags . -}}
|
||||
_arguments \
|
||||
{{range .}}
|
||||
{{if simpleFlag .}}{{template "simpleFlag" .}}{{else}}{{template "complexFlag" .}}{{end}} \
|
||||
{{end -}}
|
||||
{{ /* leave this line empty because of the last backslash */ }}
|
||||
{{end -}}
|
||||
}
|
||||
{{end}}
|
||||
|
||||
{{define "selectCmdTemplate" -}}
|
||||
{{with .Commands}}{{template "argumentsC" .}}{{else}}{{template "arguments" .}}{{end}}
|
||||
{{end -}}
|
||||
|
||||
{{define "Main"}}
|
||||
#compdef _{{.Use}} {{.Use}}
|
||||
|
||||
{{template "selectCmdTemplate" .}}
|
||||
{{end}}
|
||||
Loading…
Reference in a new issue