From b624966d8be2bb6a1f4d12677265b3f31de8533e Mon Sep 17 00:00:00 2001 From: Anton Novojilov Date: Fri, 10 Sep 2021 13:38:49 +0300 Subject: [PATCH] First version --- .codebeatsettings | 11 + .github/CODE_OF_CONDUCT.md | 42 +++ .github/CONTRIBUTING.md | 19 ++ .github/ISSUE_TEMPLATE.md | 53 ++++ .github/PULL_REQUEST_TEMPLATE.md | 24 ++ .github/workflows/ci.yml | 47 ++++ .github/workflows/codeql.yml | 28 ++ Dockerfile | 36 +++ LICENSE | 201 ++++++++++++++ Makefile | 49 ++++ README.md | 85 +++++- SECURITY.md | 36 +++ rsz.go | 440 +++++++++++++++++++++++++++++++ 13 files changed, 1069 insertions(+), 2 deletions(-) create mode 100644 .codebeatsettings create mode 100644 .github/CODE_OF_CONDUCT.md create mode 100644 .github/CONTRIBUTING.md create mode 100644 .github/ISSUE_TEMPLATE.md create mode 100644 .github/PULL_REQUEST_TEMPLATE.md create mode 100644 .github/workflows/ci.yml create mode 100644 .github/workflows/codeql.yml create mode 100644 Dockerfile create mode 100644 LICENSE create mode 100644 Makefile create mode 100644 SECURITY.md create mode 100644 rsz.go diff --git a/.codebeatsettings b/.codebeatsettings new file mode 100644 index 0000000..8e5dd08 --- /dev/null +++ b/.codebeatsettings @@ -0,0 +1,11 @@ +{ + "GOLANG": { + "ABC": [15, 25, 50, 70], + "LOC": [30, 45, 70, 100], + "BLOCK_NESTING": [4, 6, 8, 10], + "TOO_MANY_IVARS": [50, 75, 100, 150], + "TOO_MANY_FUNCTIONS": [64, 128, 256, 512], + "TOTAL_LOC": [1500, 3000, 5000, 10000], + "TOTAL_COMPLEXITY": [350, 600, 900, 1200] + } +} diff --git a/.github/CODE_OF_CONDUCT.md b/.github/CODE_OF_CONDUCT.md new file mode 100644 index 0000000..45abf3d --- /dev/null +++ b/.github/CODE_OF_CONDUCT.md @@ -0,0 +1,42 @@ +# Contributor Code of Conduct + +As contributors and maintainers of this project, and in the interest of +fostering an open and welcoming community, we pledge to respect all people who +contribute through reporting issues, posting feature requests, updating +documentation, submitting pull requests or patches, and other activities. + +We are committed to making participation in this project a harassment-free +experience for everyone, regardless of level of experience, gender, gender +identity and expression, sexual orientation, disability, personal appearance, +body size, race, ethnicity, age, religion, or nationality. + +Examples of unacceptable behavior by participants include: + +* The use of sexualized language or imagery +* Personal attacks +* Trolling or insulting/derogatory comments +* Public or private harassment +* Publishing other's private information, such as physical or electronic + addresses, without explicit permission +* Other unethical or unprofessional conduct + +Project maintainers have the right and responsibility to remove, edit, or +reject comments, commits, code, wiki edits, issues, and other contributions +that are not aligned to this Code of Conduct, or to ban temporarily or +permanently any contributor for other behaviors that they deem inappropriate, +threatening, offensive, or harmful. + +By adopting this Code of Conduct, project maintainers commit themselves to +fairly and consistently applying these principles to every aspect of managing +this project. Project maintainers who do not follow or enforce the Code of +Conduct may be permanently removed from the project team. + +This Code of Conduct applies both within project spaces and in public spaces +when an individual is representing the project or its community. + +Instances of abusive, harassing, or otherwise unacceptable behavior may be +reported by contacting a project maintainer at `conduct@essentialkaos.com`. All +complaints will be reviewed and investigated and will result in a response that +is deemed necessary and appropriate to the circumstances. Maintainers are +obligated to maintain confidentiality with regard to the reporter of an +incident. diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md new file mode 100644 index 0000000..d7da3fb --- /dev/null +++ b/.github/CONTRIBUTING.md @@ -0,0 +1,19 @@ +# Contributing Guidelines + +**IMPORTANT! Contribute your code only if you have an excellent understanding of project idea and all existing code base. Otherwise, a nicely formatted issue will be more helpful to us.** + +### Issues + +1. Provide product version where the problem was found; +2. Provide info about your environment; +3. Provide detailed info about your problem; +4. Provide steps to reproduce the problem; +5. Provide actual and expected results. + +### Code + +1. Check your code **before** creating pull request; +2. If tests are present in a project, add tests for your code; +3. Add inline documentation for your code; +4. Apply code style used throughout the project; +5. Create your pull request to `develop` branch (_pull requests to other branches are not allowed_). diff --git a/.github/ISSUE_TEMPLATE.md b/.github/ISSUE_TEMPLATE.md new file mode 100644 index 0000000..96e4fb1 --- /dev/null +++ b/.github/ISSUE_TEMPLATE.md @@ -0,0 +1,53 @@ +_Before opening an issue, search for similar bug reports or feature requests on GitHub Issues. If yes, please add a_ 👍 _reaction to the existing issue. If no similar issue can be found, fill out either the "Bug Report" or the "Feature Request" section below. Erase the other section and everything on and above this line._ + +### Bug report + +**System info:** + +* **Version used (`rsz --version`):** +* **OS (e.g. from `/etc/*-release`):** +* **Kernel (`uname -a`):** +* **Install tools:** + +**Steps to reproduce:** + +1. [First Step] +2. [Second Step] +3. [and so on...] + +**Expected behavior:** + +[What you expected to happen] + +**Actual behavior:** + +[What actually happened] + +**Additional info:** + +[Include gist of relevant config, logs, etc.] + +Please run those if possible and link them from a [gist](http://gist.github.com). + +--- + +### Feature Request + +Opening a feature request kicks off a discussion. Requests may be closed if we're not actively planning to work on them. + +**Proposal:** + +[Description of the feature] + +**Current behavior:** + +[What currently happens] + +**Desired behavior:** + +[What you would like to happen] + +**Use case:** + +[Why is this important (helps with prioritizing requests)] + diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md new file mode 100644 index 0000000..e7814b8 --- /dev/null +++ b/.github/PULL_REQUEST_TEMPLATE.md @@ -0,0 +1,24 @@ +### What did you implement: + +Closes #XXXXX + +### How did you implement it: + +... + +### How can we verify it: + +... + +### TODO's: + +- [ ] Write tests +- [ ] Write documentation +- [ ] Check that there aren't other open pull requests for the same issue/feature +- [ ] Format your source code by `make fmt` +- [ ] Provide verification config / commands +- [ ] Enable "Allow edits from maintainers" for this PR +- [ ] Update the messages below + +**Is this ready for review?:** No +**Is it a breaking change?:** No diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml new file mode 100644 index 0000000..abebf0b --- /dev/null +++ b/.github/workflows/ci.yml @@ -0,0 +1,47 @@ +name: CI + +on: + push: + branches: [master, develop] + pull_request: + branches: [master] + +jobs: + Go: + name: Go + runs-on: ubuntu-latest + + env: + SRC_DIR: src/github.com/${{ github.repository }} + GO111MODULE: auto + + strategy: + matrix: + go: [ '1.16.x', '1.17.x' ] + + steps: + - name: Set up Go + uses: actions/setup-go@v2 + with: + go-version: ${{ matrix.go }} + id: go + + - name: Setup PATH + run: | + echo "GOPATH=${{ github.workspace }}" >> "$GITHUB_ENV" + echo "GOBIN=${{ github.workspace }}/bin" >> "$GITHUB_ENV" + echo "${{ github.workspace }}/bin" >> "$GITHUB_PATH" + + - name: Checkout + uses: actions/checkout@v2 + with: + path: ${{env.SRC_DIR}} + + - name: Download dependencies + working-directory: ${{env.SRC_DIR}} + run: make deps + + - name: Run tests + working-directory: ${{env.SRC_DIR}} + run: make all + diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml new file mode 100644 index 0000000..3444662 --- /dev/null +++ b/.github/workflows/codeql.yml @@ -0,0 +1,28 @@ +name: "CodeQL" + +on: + push: + branches: [master, develop] + pull_request: + branches: [master] + schedule: + - cron: '0 17 * * 1,3,5' + +jobs: + analyse: + name: Analyse + runs-on: ubuntu-latest + + steps: + - name: Checkout repository + uses: actions/checkout@v2 + with: + fetch-depth: 2 + + - name: Initialize CodeQL + uses: github/codeql-action/init@v1 + with: + languages: go + + - name: Perform CodeQL Analysis + uses: github/codeql-action/analyze@v1 diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..af485cc --- /dev/null +++ b/Dockerfile @@ -0,0 +1,36 @@ +## BUILDER ##################################################################### + +FROM golang:alpine as builder + +WORKDIR /go/src/github.com/essentialkaos/rsz + +COPY . . + +ENV GO111MODULE=auto + +RUN apk add --no-cache git=~2.32 make=4.3-r0 upx=3.96-r1 && \ + make deps && \ + make all && \ + upx rsz + +## FINAL IMAGE ################################################################# + +FROM essentialkaos/alpine:3.13 + +LABEL org.opencontainers.image.title="rsz" \ + org.opencontainers.image.description="Simple utility for image resizing" \ + org.opencontainers.image.vendor="ESSENTIAL KAOS" \ + org.opencontainers.image.authors="Anton Novojilov" \ + org.opencontainers.image.licenses="Apache-2.0" \ + org.opencontainers.image.url="https://kaos.sh/rsz" \ + org.opencontainers.image.source="https://github.com/essentialkaos/rsz" + +COPY --from=builder /go/src/github.com/essentialkaos/rsz/rsz \ + /usr/bin/ + +# hadolint ignore=DL3018 +RUN apk add --no-cache ca-certificates + +ENTRYPOINT ["rsz"] + +################################################################################ diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..12fb719 --- /dev/null +++ b/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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In no event and under no legal theory, + whether in tort (including negligence), contract, or otherwise, + unless required by applicable law (such as deliberate and grossly + negligent acts) or agreed to in writing, shall any Contributor be + liable to You for damages, including any direct, indirect, special, + incidental, or consequential damages of any character arising as a + result of this License or out of the use or inability to use the + Work (including but not limited to damages for loss of goodwill, + work stoppage, computer failure or malfunction, or any and all + other commercial damages or losses), even if such Contributor + has been advised of the possibility of such damages. + + 9. Accepting Warranty or Additional Liability. While redistributing + the Work or Derivative Works thereof, You may choose to offer, + and charge a fee for, acceptance of support, warranty, indemnity, + or other liability obligations and/or rights consistent with this + License. However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS + + APPENDIX: How to apply the Apache License to your work. + + To apply the Apache License to your work, attach the following + boilerplate notice, with the fields enclosed by brackets "[]" + replaced with your own identifying information. (Don't include + the brackets!) The text should be enclosed in the appropriate + comment syntax for the file format. We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright 2020 ESSENTIAL KAOS + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..7a414ff --- /dev/null +++ b/Makefile @@ -0,0 +1,49 @@ +################################################################################ + +# This Makefile generated by GoMakeGen 1.3.2 using next command: +# gomakegen . +# +# More info: https://kaos.sh/gomakegen + +################################################################################ + +.DEFAULT_GOAL := help +.PHONY = fmt vet all clean git-config deps help + +################################################################################ + +all: rsz ## Build all binaries + +rsz: ## Build rsz binary + go build rsz.go + +install: ## Install all binaries + cp rsz /usr/bin/rsz + +uninstall: ## Uninstall all binaries + rm -f /usr/bin/rsz + +git-config: ## Configure git redirects for stable import path services + git config --global http.https://pkg.re.followRedirects true + +deps: git-config ## Download dependencies + go get -d -v github.com/disintegration/imaging + go get -d -v pkg.re/essentialkaos/ek.v12 + +fmt: ## Format source code with gofmt + find . -name "*.go" -exec gofmt -s -w {} \; + +vet: ## Runs go vet over sources + go vet -composites=false -printfuncs=LPrintf,TLPrintf,TPrintf,log.Debug,log.Info,log.Warn,log.Error,log.Critical,log.Print ./... + +clean: ## Remove generated files + rm -f rsz + +help: ## Show this info + @echo -e '\n\033[1mSupported targets:\033[0m\n' + @grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) \ + | awk 'BEGIN {FS = ":.*?## "}; {printf " \033[33m%-12s\033[0m %s\n", $$1, $$2}' + @echo -e '' + @echo -e '\033[90mGenerated by GoMakeGen 1.3.2\033[0m\n' + +################################################################################ diff --git a/README.md b/README.md index 1cc1d13..dd064e8 100644 --- a/README.md +++ b/README.md @@ -1,2 +1,83 @@ -# rsz -Simple utility for image resizing +

+ +

+ GitHub Actions CI Status + GoReportCard + Codebeat badge + GitHub Actions CodeQL Status + +

+ +

Installation • Command-line completion • Man documentation • Usage • Build Status • Contributing • License

+ +
+ +`rsz` is a simple utility for image resizing. + +### Installation + +#### From source + +To build the `rsz` from scratch, make sure you have a working Go 1.16+ workspace (_[instructions](https://golang.org/doc/install)_), then: + +``` +go install github.com/essentialkaos/rsz +``` + +#### Prebuilt binaries + +You can download prebuilt binaries for Linux and OS X from [EK Apps Repository](https://apps.kaos.st/rsz/latest): + +```bash +bash <(curl -fsSL https://apps.kaos.st/get) rsz +``` + +### Command-line completion + +You can generate completion for `bash`, `zsh` or `fish` shell. + +Bash: +```bash +sudo rsz --completion=bash 1> /etc/bash_completion.d/rsz +``` + +ZSH: +```bash +sudo rsz --completion=zsh 1> /usr/share/zsh/site-functions/rsz +``` + +Fish: +```bash +sudo rsz --completion=fish 1> /usr/share/fish/vendor_completions.d/rsz.fish +``` + +### Man documentation + +You can generate man page using next command: + +```bash +rsz --generate-man | sudo gzip > /usr/share/man/man1/rsz.1.gz +``` + +### Usage + +``` + +``` + +### Build Status + +| Branch | Status | +|--------|----------| +| `master` | [![CI](https://kaos.sh/w/rsz/ci.svg?branch=master)](https://kaos.sh/w/rsz/ci?query=branch:master) | +| `develop` | [![CI](https://kaos.sh/w/rsz/ci.svg?branch=develop)](https://kaos.sh/w/rsz/ci?query=branch:develop) | + +### Contributing + +Before contributing to this project please read our [Contributing Guidelines](https://github.com/essentialkaos/contributing-guidelines#contributing-guidelines). + +### License + +[Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0) + +

diff --git a/SECURITY.md b/SECURITY.md new file mode 100644 index 0000000..f42c71e --- /dev/null +++ b/SECURITY.md @@ -0,0 +1,36 @@ +# Security Policies and Procedures + +This document outlines security procedures and general policies for all +ESSENTIAL KAOS projects. + + * [Reporting a Bug](#reporting-a-bug) + * [Disclosure Policy](#disclosure-policy) + +## Reporting a Bug + +The ESSENTIAL KAOS team and community take all security bugs in our projects +very seriously. Thank you for improving the security of our project. We +appreciate your efforts and responsible disclosure and will make every effort +to acknowledge your contributions. + +Report security bugs by emailing our security team at security@essentialkaos.com. + +The security team will acknowledge your email within 48 hours and will send a +more detailed response within 48 hours, indicating the next steps in handling +your report. After the initial reply to your report, the security team will +endeavor to keep you informed of the progress towards a fix and full +announcement, and may ask for additional information or guidance. + +Report security bugs in third-party dependencies to the person or team +maintaining the dependencies. + +## Disclosure Policy + +When the security team receives a security bug report, they will assign it to a +primary handler. This person will coordinate the fix and release process, +involving the following steps: + + * Confirm the problem and determine the affected versions; + * Audit code to find any similar potential problems; + * Prepare fixes for all releases still under maintenance. These fixes will be + released as fast as possible. diff --git a/rsz.go b/rsz.go new file mode 100644 index 0000000..f772afb --- /dev/null +++ b/rsz.go @@ -0,0 +1,440 @@ +package main + +// ////////////////////////////////////////////////////////////////////////////////// // +// // +// Copyright (c) 2021 ESSENTIAL KAOS // +// Apache License, Version 2.0 // +// // +// ////////////////////////////////////////////////////////////////////////////////// // + +import ( + "fmt" + "image" + "os" + "strconv" + "strings" + + "pkg.re/essentialkaos/ek.v12/fmtc" + "pkg.re/essentialkaos/ek.v12/fmtutil" + "pkg.re/essentialkaos/ek.v12/fsutil" + "pkg.re/essentialkaos/ek.v12/options" + "pkg.re/essentialkaos/ek.v12/strutil" + "pkg.re/essentialkaos/ek.v12/usage" + "pkg.re/essentialkaos/ek.v12/usage/completion/bash" + "pkg.re/essentialkaos/ek.v12/usage/completion/fish" + "pkg.re/essentialkaos/ek.v12/usage/completion/zsh" + "pkg.re/essentialkaos/ek.v12/usage/man" + "pkg.re/essentialkaos/ek.v12/usage/update" + + "github.com/disintegration/imaging" +) + +// ////////////////////////////////////////////////////////////////////////////////// // + +// Basic utility info +const ( + APP = "rsz" + VER = "0.0.1" + DESC = "Simple utility for image resizing" +) + +// ////////////////////////////////////////////////////////////////////////////////// // + +// Options +const ( + OPT_FILTER = "f:filter" + OPT_LIST_FILTERS = "F:list-filters" + OPT_NO_COLOR = "nc:no-color" + OPT_HELP = "h:help" + OPT_VER = "v:version" + + OPT_COMPLETION = "completion" + OPT_GENERATE_MAN = "generate-man" +) + +// ////////////////////////////////////////////////////////////////////////////////// // + +// optMap contains information about all supported options +var optMap = options.Map{ + OPT_FILTER: {Value: "CatmullRom"}, + OPT_LIST_FILTERS: {Type: options.BOOL}, + OPT_NO_COLOR: {Type: options.BOOL}, + OPT_HELP: {Type: options.BOOL, Alias: "u:usage"}, + OPT_VER: {Type: options.BOOL, Alias: "ver"}, + + OPT_COMPLETION: {}, + OPT_GENERATE_MAN: {Type: options.BOOL}, +} + +// supportedFilters is a slice with supported filters +var supportedFilters = []string{ + "BSpline", + "Bartlett", + "Blackman", + "Box", + "CatmullRom", + "Cosine", + "Gaussian", + "Hamming", + "Hann", + "Hermite", + "Lanczos", + "Linear", + "MitchellNetravali", + "NearestNeighbor", + "Welch", +} + +// ////////////////////////////////////////////////////////////////////////////////// // + +// main is main function +func main() { + args, errs := options.Parse(optMap) + + if len(errs) != 0 { + for _, err := range errs { + printError(err.Error()) + } + + os.Exit(1) + } + + preConfigureUI() + + if options.Has(OPT_COMPLETION) { + os.Exit(genCompletion()) + } + + if options.Has(OPT_GENERATE_MAN) { + os.Exit(genMan()) + } + + configureUI() + + if options.GetB(OPT_LIST_FILTERS) { + listFilters() + os.Exit(0) + } + + if options.GetB(OPT_VER) { + os.Exit(showAbout()) + } + + if options.GetB(OPT_HELP) || len(args) < 3 { + os.Exit(showUsage()) + } + + process(args) +} + +// preConfigureUI preconfigures UI based on information about user terminal +func preConfigureUI() { + term := os.Getenv("TERM") + + fmtc.DisableColors = true + + if term != "" { + switch { + case strings.Contains(term, "xterm"), + strings.Contains(term, "color"), + term == "screen": + fmtc.DisableColors = false + } + } + + if !fsutil.IsCharacterDevice("/dev/stdout") && os.Getenv("FAKETTY") == "" { + fmtc.DisableColors = true + } + + if os.Getenv("NO_COLOR") != "" { + fmtc.DisableColors = true + } +} + +// configureUI configures user interface +func configureUI() { + if options.GetB(OPT_NO_COLOR) { + fmtc.DisableColors = true + } +} + +// listFilters prints names of supported resampling filters +func listFilters() { + current := options.GetS(OPT_FILTER) + + fmtc.NewLine() + + for _, filter := range supportedFilters { + if filter == current { + fmtc.Printf(" {s}•{!} %s {s-}(default){!}\n", filter) + } else { + fmtc.Printf(" {s}•{!} %s\n", filter) + } + } + + fmtc.NewLine() +} + +// process starts image processing +func process(args []string) { + srcImage, size, outImage := args[0], args[1], args[2] + + err := checkSrcImage(srcImage) + + if err != nil { + printErrorAndExit(err.Error()) + } + + err = resizeImage(srcImage, outImage, size) + + if err != nil { + printErrorAndExit(err.Error()) + } + + fmtc.Printf( + "{g}Image successfully resized and saved as {g*}%s{!} {s-}(%s){!}\n", + outImage, fmtutil.PrettySize(fsutil.GetSize(outImage)), + ) +} + +// resizeImage resizes image +func resizeImage(srcImage, outImage, size string) error { + filter, err := getResampleFilter() + + if err != nil { + return err + } + + img, err := imaging.Open(srcImage) + + if err != nil { + return fmt.Errorf("Can't open image: %v", err.Error()) + } + + w, h, err := parseSize(size, img.Bounds()) + + img = imaging.Resize(img, w, h, filter) + err = imaging.Save(img, outImage) + + if err != nil { + return fmt.Errorf("Can't save image: %v", err.Error()) + } + + return nil +} + +// getResampleFilter returns resampling filter config +func getResampleFilter() (imaging.ResampleFilter, error) { + filter := options.GetS(OPT_FILTER) + + switch strings.ToLower(filter) { + case strings.ToLower("BSpline"): + return imaging.BSpline, nil + case strings.ToLower("Bartlett"): + return imaging.Bartlett, nil + case strings.ToLower("Blackman"): + return imaging.Blackman, nil + case strings.ToLower("Box"): + return imaging.Box, nil + case strings.ToLower("CatmullRom"): + return imaging.CatmullRom, nil + case strings.ToLower("Cosine"): + return imaging.Cosine, nil + case strings.ToLower("Gaussian"): + return imaging.Gaussian, nil + case strings.ToLower("Hamming"): + return imaging.Hamming, nil + case strings.ToLower("Hann"): + return imaging.Hann, nil + case strings.ToLower("Hermite"): + return imaging.Hermite, nil + case strings.ToLower("Lanczos"): + return imaging.Lanczos, nil + case strings.ToLower("Linear"): + return imaging.Linear, nil + case strings.ToLower("MitchellNetravali"): + return imaging.MitchellNetravali, nil + case strings.ToLower("NearestNeighbor"): + return imaging.NearestNeighbor, nil + case strings.ToLower("Welch"): + return imaging.Welch, nil + } + + return imaging.ResampleFilter{}, fmt.Errorf("Unknown resampling filter \"%s\"", filter) +} + +// checkSrcImage checks source image before processing +func checkSrcImage(srcImage string) error { + if !fsutil.IsExist(srcImage) { + return fmt.Errorf("Image %s doesn't exist", srcImage) + } + + if !fsutil.IsReadable(srcImage) { + return fmt.Errorf("Image file %s is not readable", srcImage) + } + + if !fsutil.IsNonEmpty(srcImage) { + return fmt.Errorf("Image file %s is empty", srcImage) + } + + return nil +} + +// parseSize parses new image size +func parseSize(size string, bounds image.Rectangle) (int, int, error) { + switch { + case strings.Contains(size, "x"): + return parseExactSize(size) + case strings.Contains(size, "%"), strings.Contains(size, "."): + return parseRelativeSize(size, bounds) + } + + return 0, 0, fmt.Errorf("Unsupported size definition \"%s\"", size) +} + +// parseExactSize parses exact image size +func parseExactSize(size string) (int, int, error) { + ws := strutil.ReadField(size, 0, false, "x") + hs := strutil.ReadField(size, 1, false, "x") + + w, err := strconv.Atoi(ws) + + if err != nil { + return 0, 0, fmt.Errorf("Can't parse width value: %v", err) + } + + h, err := strconv.Atoi(hs) + + if err != nil { + return 0, 0, fmt.Errorf("Can't parse height value: %v", err) + } + + return w, h, nil +} + +// parseRelativeSize parses relative image size +func parseRelativeSize(size string, bounds image.Rectangle) (int, int, error) { + var err error + var mod float64 + + if strings.Contains(size, "%") { + mod, err = strconv.ParseFloat(strings.Trim(size, "%"), 64) + + if err != nil { + return 0, 0, fmt.Errorf("Can't parse size: %v", err) + } + + mod /= 100.0 + } else { + mod, err = strconv.ParseFloat(size, 64) + + if err != nil { + return 0, 0, fmt.Errorf("Can't parse size: %v", err) + } + } + + return int(float64(bounds.Max.X) * mod), + int(float64(bounds.Max.Y) * mod), nil +} + +// printError prints error message to console +func printError(f string, a ...interface{}) { + fmtc.Fprintf(os.Stderr, "{r}"+f+"{!}\n", a...) +} + +// printError prints warning message to console +func printWarn(f string, a ...interface{}) { + fmtc.Fprintf(os.Stderr, "{y}"+f+"{!}\n", a...) +} + +// printErrorAndExit print error mesage and exit with exit code 1 +func printErrorAndExit(f string, a ...interface{}) { + printError(f, a...) + os.Exit(1) +} + +// ////////////////////////////////////////////////////////////////////////////////// // + +// showUsage prints usage info +func showUsage() int { + genUsage().Render() + return 0 +} + +// showAbout prints info about version +func showAbout() int { + genAbout().Render() + return 0 +} + +// genCompletion generates completion for different shells +func genCompletion() int { + info := genUsage() + + switch options.GetS(OPT_COMPLETION) { + case "bash": + fmt.Printf(bash.Generate(info, "rsz")) + case "fish": + fmt.Printf(fish.Generate(info, "rsz")) + case "zsh": + fmt.Printf(zsh.Generate(info, optMap, "rsz")) + default: + return 1 + } + + return 0 +} + +// genMan generates man page +func genMan() int { + fmt.Println( + man.Generate( + genUsage(), + genAbout(), + ), + ) + + return 0 +} + +// genUsage generates usage info +func genUsage() *usage.Info { + info := usage.NewInfo("", "src-image", "size", "output-image") + + info.AddOption(OPT_FILTER, "Resampling filter name") + info.AddOption(OPT_NO_COLOR, "Disable colors in output") + info.AddOption(OPT_HELP, "Show this help message") + info.AddOption(OPT_VER, "Show version") + + info.AddExample( + "image.png 256x256 thumbnail.png", + "Convert image to exact size", + ) + + info.AddExample( + "image.png 25% thumbnail.png", + "Convert image to relative size (25% of original)", + ) + + info.AddExample( + "image.png 0.55 thumbnail.png", + "Convert image to relative size (55% of original)", + ) + + return info +} + +// genAbout generates info about version +func genAbout() *usage.About { + return &usage.About{ + App: APP, + Version: VER, + Desc: DESC, + Year: 2009, + Owner: "ESSENTIAL KAOS", + License: "Apache License, Version 2.0 ", + UpdateChecker: usage.UpdateChecker{"essentialkaos/rsz", update.GitHubChecker}, + } +} + +// ////////////////////////////////////////////////////////////////////////////////// //