tesseract/snap/snapcraft.yaml

name: tesseract
version: git
summary: open source optical character recognition engine
description: |
  Tesseract has unicode (UTF-8) support, and can recognize more than 100
  languages "out of the box". It can be trained to recognize other languages.
  Tesseract supports various output formats: plain-text, hocr(html), pdf.

  If you want to access the files under /media/* or /run/media/* you'll have
  to connect the snap to the `core` snap's `removable-media` interface:

      $ sudo snap connect tesseract:removable-media

grade: stable # must be 'stable' to release into candidate/stable channels
confinement: strict

apps:
  tesseract:
    command: >
      env
      TESSDATA_PREFIX=$SNAP_USER_COMMON
      tesseract
    plugs:
      - home
      - removable-media

parts:
  tesseract:
    source: .
    plugin: autotools
    build-packages:
      - pkg-config
      - libpng12-dev
      - libjpeg8-dev
      - libtiff5-dev
      - zlib1g-dev
      - libicu-dev
      - libpango1.0-dev
      - libcairo2-dev
    stage-packages:
      - libgomp1
    after: [leptonica]
  leptonica:
    source: https://github.com/DanBloomberg/leptonica/archive/1.74.2.tar.gz
    plugin: autotools
    stage-packages:
      - libjbig0
      - libjpeg-turbo8
      - libopenjp2-7
      - libtiff5
Add the packaging metadata to build the tesseract snap 2017-02-03 14:37:39 +08:00			`name: tesseract`
Use automatic git-based versioning for the snap Snapcraft supports automatic `git describe` based versioning when the `version` key is set to `git`. This gives more information of the source status of a snap distribution. Refer-to: Snapcraft.yaml reference - doc - snapcraft.io <https://forum.snapcraft.io/t/snapcraft-yaml-reference/4276> Signed-off-by: 林博仁(Buo-ren, Lin) <Buo.Ren.Lin@gmail.com> 2018-09-03 16:17:47 +08:00			`version: git`
Add the packaging metadata to build the tesseract snap 2017-02-03 14:37:39 +08:00			`summary: open source optical character recognition engine`
			`description: \|`
			`Tesseract has unicode (UTF-8) support, and can recognize more than 100`
			`languages "out of the box". It can be trained to recognize other languages.`
			`Tesseract supports various output formats: plain-text, hocr(html), pdf.`

Assert removable-media interface in the snap This allows access to the files under `/media/` and `/run/media/`, as the connection is not automatic connect instructions is also added to the snap's description. Refer-to: Interfaces - doc - snapcraft.io <https://forum.snapcraft.io/t/interfaces/6154> Signed-off-by: 林博仁(Buo-ren, Lin) <Buo.Ren.Lin@gmail.com> 2018-09-03 16:45:08 +08:00			`If you want to access the files under /media/* or /run/media/* you'll have`
			to connect the snap to the `core` snap's `removable-media` interface:

			`$ sudo snap connect tesseract:removable-media`

Flip snap packaging's grade to stable This change allows downstream packagers to publish the snap to the candidate and stable channels. Signed-off-by: 林博仁(Buo-ren, Lin) <Buo.Ren.Lin@gmail.com> 2018-09-03 16:20:15 +08:00			`grade: stable # must be 'stable' to release into candidate/stable channels`
Add the packaging metadata to build the tesseract snap 2017-02-03 14:37:39 +08:00			`confinement: strict`

			`apps:`
			`tesseract:`
Split app. command arguments into separate lines This allows cleaner diffs for future modifications using the YAML's "folded" block scalar style. Refer-to: Folded Style - Block Scalar Styles - Block Styles <http://yaml.org/spec/1.2/spec.html#id2796251> Signed-off-by: 林博仁(Buo-ren, Lin) <Buo.Ren.Lin@gmail.com> 2018-09-03 16:32:09 +08:00			`command: >`
			`env`
			`TESSDATA_PREFIX=$SNAP_USER_COMMON`
			`tesseract`
Assert removable-media interface in the snap This allows access to the files under `/media/` and `/run/media/`, as the connection is not automatic connect instructions is also added to the snap's description. Refer-to: Interfaces - doc - snapcraft.io <https://forum.snapcraft.io/t/interfaces/6154> Signed-off-by: 林博仁(Buo-ren, Lin) <Buo.Ren.Lin@gmail.com> 2018-09-03 16:45:08 +08:00			`plugs:`
			`- home`
			`- removable-media`
Add the packaging metadata to build the tesseract snap 2017-02-03 14:37:39 +08:00
			`parts:`
			`tesseract:`
			`source: .`
			`plugin: autotools`
			`build-packages:`
			`- pkg-config`
			`- libpng12-dev`
			`- libjpeg8-dev`
			`- libtiff5-dev`
			`- zlib1g-dev`
			`- libicu-dev`
			`- libpango1.0-dev`
			`- libcairo2-dev`
Stage packages that provides the depending libraries Snapcraft will soonly drop the feature to automatic staging the depending libraries into the snap, specify it manually to avoid breakage in the future. This deals with the following warning message in the build: ``` Priming leptonica Files from the build host were migrated into the snap to satisfy dependencies that would otherwise not be met. This feature will be removed in a future release. If these libraries are needed in the final snap, ensure that the following are either satisfied by a stage-packages entry or through a part: usr/lib/x86_64-linux-gnu/libjbig.so.0 usr/lib/x86_64-linux-gnu/libjpeg.so.8 usr/lib/x86_64-linux-gnu/libopenjp2.so.7 usr/lib/x86_64-linux-gnu/libtiff.so.5 Priming tesseract Files from the build host were migrated into the snap to satisfy dependencies that would otherwise not be met. This feature will be removed in a future release. If these libraries are needed in the final snap, ensure that the following are either satisfied by a stage-packages entry or through a part: usr/lib/x86_64-linux-gnu/libgomp.so.1 ``` Signed-off-by: 林博仁(Buo-ren, Lin) <Buo.Ren.Lin@gmail.com> 2018-09-03 17:13:06 +08:00			`stage-packages:`
			`- libgomp1`
Add the packaging metadata to build the tesseract snap 2017-02-03 14:37:39 +08:00			`after: [leptonica]`
			`leptonica:`
Download the leptonica source from github 1.74.2 is no longer available from the leptonica website. But anyway, it seems safer going forward to download it from github. It's https, and it won't disappear as easily. Also, this is the same source used by travis, so there's less chance of shipping something untested. 2017-06-30 06:29:29 +08:00			`source: https://github.com/DanBloomberg/leptonica/archive/1.74.2.tar.gz`
Add the packaging metadata to build the tesseract snap 2017-02-03 14:37:39 +08:00			`plugin: autotools`
Stage packages that provides the depending libraries Snapcraft will soonly drop the feature to automatic staging the depending libraries into the snap, specify it manually to avoid breakage in the future. This deals with the following warning message in the build: ``` Priming leptonica Files from the build host were migrated into the snap to satisfy dependencies that would otherwise not be met. This feature will be removed in a future release. If these libraries are needed in the final snap, ensure that the following are either satisfied by a stage-packages entry or through a part: usr/lib/x86_64-linux-gnu/libjbig.so.0 usr/lib/x86_64-linux-gnu/libjpeg.so.8 usr/lib/x86_64-linux-gnu/libopenjp2.so.7 usr/lib/x86_64-linux-gnu/libtiff.so.5 Priming tesseract Files from the build host were migrated into the snap to satisfy dependencies that would otherwise not be met. This feature will be removed in a future release. If these libraries are needed in the final snap, ensure that the following are either satisfied by a stage-packages entry or through a part: usr/lib/x86_64-linux-gnu/libgomp.so.1 ``` Signed-off-by: 林博仁(Buo-ren, Lin) <Buo.Ren.Lin@gmail.com> 2018-09-03 17:13:06 +08:00			`stage-packages:`
			`- libjbig0`
			`- libjpeg-turbo8`
			`- libopenjp2-7`
Add newline at end of file Signed-off-by: 林博仁(Buo-ren, Lin) <Buo.Ren.Lin@gmail.com> 2018-09-03 17:13:45 +08:00			`- libtiff5`