regex101: npm expression parser using javascript engine.

^start of line

Group exe(?<exe>npm)?

?repeats the group contents below at most once:

npmthe literal text npm (case sensitive)

\ ?optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

Group run(?<run>(?<=\k<exe> )run(?:-script)?)?

?repeats the group contents below at most once:

Positive Lookbehind(?<=\k<exe> )

\k<exe>the text saved by group exe

the literal (32₁₀ / 40₈ / 20₁₆)

runthe literal text run (case sensitive)

Non-Capturing Group(?:-script)?

?repeats the group contents below at most once:

-scriptthe literal text -script (case sensitive)

\ ?optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

Group command(?<command>(?<=\k<run> )[a-z]+(?:[-|:|.|_][a-z]+)?|(?<!\k<run> )[a-z]+(?:[-][a-z]+)?)?

?repeats the group contents below at most once:

1st Alternative(?<=\k<run> )[a-z]+(?:[-|:|.|_][a-z]+)?

Positive Lookbehind(?<=\k<run> )

\k<run>the text saved by group run

the literal (32₁₀ / 40₈ / 20₁₆)

Character Class[a-z]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Non-Capturing Group(?:[-|:|.|_][a-z]+)?

?repeats the group contents below at most once:

Character Class[-|:|.|_]

-the literal - (45₁₀ / 55₈ / 2D₁₆)

|the literal | (124₁₀ / 174₈ / 7C₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Character Class[a-z]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

2nd Alternative(?<!\k<run> )[a-z]+(?:[-][a-z]+)?

Negative Lookbehind(?<!\k<run> )

\k<run>the text saved by group run

the literal (32₁₀ / 40₈ / 20₁₆)

Character Class[a-z]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Non-Capturing Group(?:[-][a-z]+)?

?repeats the group contents below at most once:

Character Class[-]

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[a-z]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

\ ?optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

Group pkgdetails(?<pkgdetails>[a-z0-9\>\=\:\+\#\^\.\@\/][a-z0-9\>\=\:\+\#\^\~\.\@\/\-]+)?

?repeats the group contents below at most once:

Character Class[a-z0-9\>\=\:\+\#\^\.\@\/]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\>the literal > (62₁₀ / 76₈ / 3E₁₆)

\=the literal = (61₁₀ / 75₈ / 3D₁₆)

\:the literal : (58₁₀ / 72₈ / 3A₁₆)

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

\#the literal # (35₁₀ / 43₈ / 23₁₆)

\^the literal ^ (94₁₀ / 136₈ / 5E₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\@the literal @ (64₁₀ / 100₈ / 40₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Character Class[a-z0-9\>\=\:\+\#\^\~\.\@\/\-]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\>the literal > (62₁₀ / 76₈ / 3E₁₆)

\=the literal = (61₁₀ / 75₈ / 3D₁₆)

\:the literal : (58₁₀ / 72₈ / 3A₁₆)

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

\#the literal # (35₁₀ / 43₈ / 23₁₆)

\^the literal ^ (94₁₀ / 136₈ / 5E₁₆)

\~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\@the literal @ (64₁₀ / 100₈ / 40₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

\ ?optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

Group options(?<options>(?:\ [-]{1,2}[a-zA-Z]+(?:[-][a-z]+)*)*)?

?repeats the group contents below at most once:

Non-Capturing Group(?:\ [-]{1,2}[a-zA-Z]+(?:[-][a-z]+)*)*

*repeats the group contents below any number of times:

\ the literal (32₁₀ / 40₈ / 20₁₆)

Character Class[-]{1,2}

{1,2}matches between 1 and 2 characters from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[a-zA-Z]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Non-Capturing Group(?:[-][a-z]+)*

*repeats the group contents below any number of times:

Character Class[-]

Character Class[a-z]+

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Search reference

Regular Expression

^(?<exe>npm)?\ ?(?<run>(?<=\k<exe> )run(?:-script)?)?\ ?(?<command>(?<=\k<run> )[a-z]+(?:[-|:|.|_][a-z]+)?|(?<!\k<run> )[a-z]+(?:[-][a-z]+)?)?\ ?(?<pkgdetails>[a-z0-9\>\=\:\+\#\^\.\@\/][a-z0-9\>\=\:\+\#\^\~\.\@\/\-]+)?\ ?(?<options>(?:\ [-]{1,2}[a-zA-Z]+(?:[-][a-z]+)*)*)?$

New

npm install cordova-browser@~5.0.1 --production --save

npm install --no-package-lock
npm -v

npm version major
npm version minor
npm version patch

npm run build
npm run build:spypkg
npm run build-spypkg
npm run build.spypkg
npm run build_spypkg
npm run-script build:spypkg
npm run-script build-spypkg
npm run-script build.spypkg
npm run-script build_spypkg

i sots --D
i sots --production
i sots --production --no-save
install sots --production --no-save
npm install sots --production --no-save

npm install ./package.tgz
npm install https://github.com/indexzero/forever/tarball/v0.5.6
npm install sax
npm install sax -P
npm install sax -D
npm install sax -O

i

npm i
i sax
i sax -D
install
install sax -P
install sax -D
install sax -O
npm install githubname/reponame
npm install @myorg/privatepackage
npm install node-tap --save-dev
npm install dtrace-provider --save-optional
npm install readable-stream --save-exact
npm install ansi-regex --save-bundle
npm install sax@latest
npm install @myorg/mypackage@latest
npm install sax@0.1.1
npm install @myorg/privatepackage@1.5.0
npm install sax@">=0.1.0 <0.2.0"
npm install @myorg/privatepackage@">=0.1.0 <0.2.0"
npm install git+ssh://git@github.com:npm/cli.git#v1.0.27
npm install git+ssh://git@github.com:npm/cli#semver:^5.0
npm install git+https://isaacs@github.com/npm/cli.git
npm install git://github.com/npm/cli.git#v1.0.27
npm install mygithubuser/myproject
npm install github:mygithubuser/myproject
npm install gist:101a11beef
npm install bitbucket:mybitbucketuser/myproject
npm install gitlab:mygitlabuser/myproject
npm install gitlab:myusr/myproj#semver:^5.0
npm install sax@">=0.1.0 <0.2.0" bench supervisor
npm install sax --force