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This allows bwrap to be built as a subproject in larger Meson projects. When built as a subproject, we install into the --libexecdir and require a program prefix to be specified: for example, Flatpak would use program_prefix=flatpak- to get /usr/libexec/flatpak-bwrap. Loosely based on previous work by Jussi Pakkanen (see containers#133). Differences between the Autotools and Meson builds: The Meson build requires a version of libcap that has pkg-config metadata (introduced in libcap 2.23, in 2013). The Meson build has no equivalent of --with-priv-mode=setuid. On distributions like Debian <= 10 and RHEL <= 7 that require a setuid bwrap executable, the sysadmin or distribution packaging will need to set the correct permissions on the bwrap executable; Debian already did this via packaging rather than the upstream build system. The Meson build supports being used as a subproject, and there is CI for this. It automatically disables shell completions and man pages, moves the bubblewrap executable to ${libexecdir}, and renames the bubblewrap executable according to a program_prefix option that the caller must specify (for example, Flatpak would use -Dprogram_prefix=flatpak- to get /usr/libexec/flatpak-bwrap). See the tests/use-as-subproject/ directory for an example. Signed-off-by: Simon McVittie <smcv@collabora.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| bash_completion_dir = get_option('bash_completion_dir') | ||
|
|
||
| if bash_completion_dir == '' | ||
| bash_completion = dependency( | ||
| 'bash-completion', | ||
| version : '>=2.0', | ||
| required : false, | ||
| ) | ||
|
|
||
| if bash_completion.found() | ||
| if meson.version().version_compare('>=0.51.0') | ||
| bash_completion_dir = bash_completion.get_variable( | ||
| default_value: '', | ||
| pkgconfig: 'completionsdir', | ||
| pkgconfig_define: [ | ||
| 'prefix', get_option('prefix'), | ||
| 'datadir', get_option('prefix') / get_option('datadir'), | ||
| ], | ||
| ) | ||
| else | ||
| bash_completion_dir = bash_completion.get_pkgconfig_variable( | ||
| 'completionsdir', | ||
| default: '', | ||
| define_variable: [ | ||
| 'prefix', get_option('prefix'), | ||
| 'datadir', get_option('prefix') / get_option('datadir'), | ||
| ], | ||
| ) | ||
| endif | ||
| endif | ||
| endif | ||
|
|
||
| if bash_completion_dir == '' | ||
| bash_completion_dir = get_option('datadir') / 'bash-completion' / 'completions' | ||
| endif | ||
|
|
||
| install_data('bwrap', install_dir : bash_completion_dir) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,7 @@ | ||
| if get_option('bash_completion').enabled() | ||
| subdir('bash') | ||
| endif | ||
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|
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| if get_option('zsh_completion').enabled() | ||
| subdir('zsh') | ||
| endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,7 @@ | ||
| zsh_completion_dir = get_option('zsh_completion_dir') | ||
|
|
||
| if zsh_completion_dir == '' | ||
| zsh_completion_dir = get_option('datadir') / 'zsh' / 'site-functions' | ||
| endif | ||
|
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| install_data('_bwrap', install_dir : zsh_completion_dir) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,144 @@ | ||
| project( | ||
| 'bubblewrap', | ||
| 'c', | ||
| version : '0.5.0', | ||
| meson_version : '>=0.49.0', | ||
| default_options : [ | ||
| 'warning_level=2', | ||
| ], | ||
| ) | ||
|
|
||
| cc = meson.get_compiler('c') | ||
| add_project_arguments('-D_GNU_SOURCE', language : 'c') | ||
|
|
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| # Keep this in sync with ostree, except remove -Wall (part of Meson | ||
| # warning_level 2) and -Werror=declaration-after-statement | ||
| add_project_arguments( | ||
| cc.get_supported_arguments([ | ||
| '-Werror=shadow', | ||
| '-Werror=empty-body', | ||
| '-Werror=strict-prototypes', | ||
| '-Werror=missing-prototypes', | ||
| '-Werror=implicit-function-declaration', | ||
| '-Werror=pointer-arith', | ||
| '-Werror=init-self', | ||
| '-Werror=missing-declarations', | ||
| '-Werror=return-type', | ||
| '-Werror=overflow', | ||
| '-Werror=int-conversion', | ||
| '-Werror=parenthesis', | ||
| '-Werror=incompatible-pointer-types', | ||
| '-Werror=misleading-indentation', | ||
| '-Werror=missing-include-dirs', | ||
| '-Werror=aggregate-return', | ||
|
|
||
| # Extra warnings specific to bubblewrap | ||
| '-Werror=switch-default', | ||
| '-Wswitch-enum', | ||
|
|
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| # Meson warning_level=2 would do this, but we are not fully | ||
| # signedness-safe yet | ||
| '-Wno-sign-compare', | ||
| '-Wno-error=sign-compare', | ||
|
|
||
| # Deliberately not warning about these, ability to zero-initialize | ||
| # a struct is a feature | ||
| '-Wno-missing-field-initializers', | ||
| '-Wno-error=missing-field-initializers', | ||
| ]), | ||
| language : 'c', | ||
| ) | ||
|
|
||
| if ( | ||
| cc.has_argument('-Werror=format=2') | ||
| and cc.has_argument('-Werror=format-security') | ||
| and cc.has_argument('-Werror=format-nonliteral') | ||
| ) | ||
| add_project_arguments([ | ||
| '-Werror=format=2', | ||
| '-Werror=format-security', | ||
| '-Werror=format-nonliteral', | ||
| ], language : 'c') | ||
| endif | ||
|
|
||
| sh = find_program('sh', required : true) | ||
| bash = find_program('bash', required : false) | ||
|
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| libcap_dep = dependency('libcap', required : true) | ||
|
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| selinux_dep = dependency( | ||
| 'libselinux', | ||
| version : '>=2.1.9', | ||
| # if disabled, Meson will behave as though libselinux was not found | ||
| required : get_option('selinux'), | ||
| ) | ||
|
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| cdata = configuration_data() | ||
| cdata.set_quoted('PACKAGE_STRING', 'bubblewrap') | ||
|
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| if selinux_dep.found() | ||
| cdata.set('HAVE_SELINUX', 1) | ||
| if selinux_dep.version().version_compare('>=2.3') | ||
| cdata.set('HAVE_SELINUX_2_3', 1) | ||
| endif | ||
| endif | ||
|
|
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| if get_option('require_userns') | ||
| cdata.set('ENABLE_REQUIRE_USERNS', 1) | ||
| endif | ||
|
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| configure_file( | ||
| output : 'config.h', | ||
| configuration : cdata, | ||
| ) | ||
|
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| if meson.is_subproject() | ||
| bwrapdir = get_option('libexecdir') | ||
|
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| if get_option('program_prefix') == '' | ||
| error('program_prefix option must be set when bwrap is a subproject') | ||
| endif | ||
| else | ||
| bwrapdir = get_option('bindir') | ||
| endif | ||
|
|
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| bwrap = executable( | ||
| get_option('program_prefix') + 'bwrap', | ||
| [ | ||
| 'bubblewrap.c', | ||
| 'bind-mount.c', | ||
| 'network.c', | ||
| 'utils.c', | ||
| ], | ||
| install : true, | ||
| install_dir : bwrapdir, | ||
| dependencies : [selinux_dep, libcap_dep], | ||
| ) | ||
|
|
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| xsltproc = find_program('xsltproc', required : get_option('man')) | ||
|
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| if xsltproc.found() and not meson.is_subproject() | ||
| custom_target( | ||
| 'bwrap.1', | ||
| output : 'bwrap.1', | ||
| input : 'bwrap.xml', | ||
| command : [ | ||
| xsltproc, | ||
| '--nonet', | ||
| '--stringparam', 'man.output.quietly', '1', | ||
| '--stringparam', 'funcsynopsis.style', 'ansi', | ||
| '--stringparam', 'man.th.extra1.suppress', '1', | ||
| '--stringparam', 'man.authors.section.enabled', '0', | ||
| '--stringparam', 'man.copyright.section.enabled', '0', | ||
| '-o', '@OUTPUT@', | ||
| 'http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl', | ||
| '@INPUT@', | ||
| ], | ||
| install : true, | ||
| install_dir : get_option('mandir') / 'man1', | ||
| ) | ||
| endif | ||
|
|
||
| if not meson.is_subproject() | ||
| subdir('completions') | ||
| endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| option( | ||
| 'bash_completion', | ||
| type : 'feature', | ||
| description : 'install bash completion script', | ||
| value : 'enabled', | ||
| ) | ||
| option( | ||
| 'bash_completion_dir', | ||
| type : 'string', | ||
| description : 'install bash completion script in this directory', | ||
| value : '', | ||
| ) | ||
| option( | ||
| 'man', | ||
| type : 'feature', | ||
| description : 'generate man pages', | ||
| value : 'auto', | ||
| ) | ||
| option( | ||
| 'program_prefix', | ||
| type : 'string', | ||
| description : 'Prepend string to bwrap executable name, for use with subprojects', | ||
| ) | ||
| option( | ||
| 'require_userns', | ||
| type : 'boolean', | ||
| description : 'require user namespaces by default when installed setuid', | ||
| value : 'false', | ||
| ) | ||
| option( | ||
| 'selinux', | ||
| type : 'feature', | ||
| description : 'enable optional SELINUX support', | ||
| value : 'auto', | ||
| ) | ||
| option( | ||
| 'zsh_completion', | ||
| type : 'feature', | ||
| description : 'install zsh completion script', | ||
| value : 'enabled', | ||
| ) | ||
| option( | ||
| 'zsh_completion_dir', | ||
| type : 'string', | ||
| description : 'install zsh completion script in this directory', | ||
| value : '', | ||
| ) |
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